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    DB2® Database Demonstration Program Version 9.5 Installation and ... DB2® Database Demonstration Program Version 9.5 Installation and ... Document Transcript

    • DB2® Database Demonstration Program Version 9.5 Installation and Quick Reference Guide George Baklarz DB2 Worldwide Technical Sales Support IBM Toronto Laboratory
    • DB2 Database Demonstration Program Version 9.5 DB2 Demonstration Program Version 9.5 Usage Guide This document contains proprietary information of IBM. It is provided under a license agreement and is protected by copyright law. The information contained in this publication does not include any product warranties, and any statements provided in this manual should not be interpreted as such. When you send information to IBM, you grant IBM a nonexclusive right to use or distribute the information in any way it believes appropriate without incurring any obligation to you. © Copyright International Business Machines Corporation 1997 - 2008. All rights reserved. US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Credits Material in this document was prepared by the DB2 Worldwide Pre-sales Support group. Copyright © 2007 IBM ii
    • DB2 Database Demonstration Program Version 9.5 Legal Notices This page may contain other proprietary notices and copyright information, the terms of which must be observed and followed. INFORMATION IN THIS DEMONSTRATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SOME JURISDICTIONS DO NOT ALLOW THE EXCLUSION OF IMPLIED WARRANTIES, SO THE ABOVE EXCLUSION MAY NOT APPLY TO YOU. Information in this demonstration may contain technical inaccuracies or typographical errors. Information may be changed or updated without notice. IBM may also make improvements and/or changes in the products and/or the programs described in this information at any time without notice. Information IBM publishes in this demonstration may contain references or cross references to IBM products, programs and services that are not announced or available in your country. Such references do not imply that IBM intends to announce such products, programs or services in your country. Consult your local IBM business contact for information regarding the products, programs and services which may be available to you. IN NO EVENT WILL IBM BE LIABLE TO ANY PARTY OR ANY DIRECT, INDIRECT, SPECIAL OR OTHER CONSEQUENTIAL DAMAGES FOR ANY USE OF THIS DEMONSTRATION, INCLUDING, WITHOUT LIMITATION, ANY LOST PROFITS, BUSINESS INTERRUPTION, LOSS OF PROGRAMS OR OTHER DATA ON YOUR INFORMATION HANDLING SYSTEM OR OTHERWISE, EVEN IF WE ARE EXPRESSLY ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Copyright © 2007, 2008 IBM i
    • DB2 Database Demonstration Program Version 9.5 Copyright and Trademark information Disclaimer and Trademarks This presentation may contain other proprietary notices and copyright information, the terms of which must be observed and followed. Information concerning non-IBM products was obtained from the suppliers of those products, their published announcements, or other publicly available sources. IBM has not tested those products and cannot confirm the accuracy of performance, compatibility, or any other claims related to non-IBM products. Questions on the capabilities of non-IBM products should be addressed to the suppliers of those products. All statements regarding IBM’s future direction or intent are subject to change or withdrawal without notice, and represent goals and objectives only. This information may contain examples of data and reports used in daily business operations. To illustrate them as completely as possible, the examples include the names of individuals, companies, brands, and products. All of these names are fictitious, and any similarity to the names and addresses used by an actual business enterprise is entirely coincidental. Trademarks The following terms are trademarks or registered trademarks of other companies and have been used in at least one of the pages of the presentation: The following terms are trademarks of International Business Machines Corporation in the United States, other countries, or both: AIX, AS/400, DataJoiner, DataPropagator, DB2, DB2 Connect, DB2 Extenders, DB2 OLAP Server, DB2 Universal Database, Distributed Relational Database Architecture, DRDA, eServer, IBM, IMS, iSeries, MVS, Net.Data, OS/390, OS/400, PowerPC, pSeries, RS/6000, SQL/400, SQL/DS, Tivoli, VisualAge, VM/ESA, VSE/ESA, WebSphere, z/OS, zSeries Microsoft, Windows, Windows NT, Windows XP, Windows Vista, and the Windows logo are trademarks of Microsoft Corporation in the United States, other countries, or both. Intel and Pentium are trademarks of Intel Corporation in the United States, other countries, or both. UNIX is a registered trademark of The Open Group in the United States and other countries. Java and all Java-based trademarks are trademarks of Sun Microsystems, Inc. in the United States, other countries, or both. Other company, product, or service names may be trademarks or service marks of others. © Copyright IBM Corporation 2008. All rights reserved. Copyright © 2007, 2008 IBM ii
    • DB2 Database Demonstration Program Version 9.5 Table of Contents DB2 Demonstration Program Version 9.5 Usage Guide.......................................................... 2 Legal Notices................................................................................................................................. 1 Copyright and Trademark information..................................................................................... 2 Disclaimer and Trademarks .................................................................................................... 2 Trademarks................................................................................................................................ 2 Introduction .................................................................................................................................. 1 DB2 Certification.......................................................................................................................... 2 Installation Requirements .......................................................................................................... 4 Installing the DB2DEMO Program............................................................................................... 5 Installation File......................................................................................................................... 5 Setup and Installation of the Program ................................................................................. 5 Advanced Installation ............................................................................................................ 10 Uninstalling the Demonstration........................................................................................... 11 Support..................................................................................................................................... 11 Using the DB2DEMO Program.................................................................................................... 12 Starting the Program ............................................................................................................. 12 Overview of the Panels ......................................................................................................... 14 Scripting Panel........................................................................................................................ 15 SQL Input Window .................................................................................................................. 20 SQL Output Window ............................................................................................................... 28 Performance Monitoring ....................................................................................................... 30 DB2DEMO Program Credits........................................................................................................ 31 Copyright © 2007, 2008 IBM iii
    • DB2 Database Demonstration Program Version 9.5 Introduction Now that you've installed DB2, you probably want to know what it can do. The DB2DEMO program lets you explore the various features of DB2, including: • SQL Features: o Referential Integrity o Domains and Constraints o Triggers o Recursive SQL o Outer Joins • Advanced Object-Relational Features: o Large Object Support (BLOBs) o User-defined Types o User-defined Functions o Table functions o Row-types and Typed Tables o Reference Types o SQL PL Stored Procedure Language • XML Support o SQL/XML Functions o XML Data type o XQuery Language Extensions • Business Intelligence Features: o Star Schema support o Multi-dimensional Analysis o Dynamic Bitmap indexes o Automatic Summary Tables o Compression o Table Partitioning • Manageability • Performance This demo lets you try out many of these features of DB2, including showing you some of the administrative and performance features. The only thing you need to do is check that you have requirements and then install the code! Copyright © 2007, 2008 IBM 1
    • DB2 Database Demonstration Program Version 9.5 DB2 Certification For additional help on using DB2, or getting certified on DB2, you may want to look at The DB2® 9 for Linux®, UNIX®, and Windows® DBA Guide, Reference, and Exam Prep, Sixth Edition, ISBN 013185514, by George Baklarz and Paul Zikopoulos. This book is a complete guide to the IBM’s relational database servers, known as DB2. DB2 is available on many operating systems, and the book has been written to cover the version available on Linux, UNIX, and Windows. Any significant differences in the implementation of DB2 on various operating systems are highlighted. If you are planning to become certified, or you would simply like to understand the powerful new DB2 database servers from IBM, then this book is a great resource. The book is divided into four parts: • Part 1 — Introduction to DB2 (Chapters 1–4). Installing and configuring DB2 servers and clients are covered in Chapters 2–4. • Part 2 — Using SQL (Chapters 5–10). The Structured Query Language (SQL) is discussed in Chapter 5, 6, and 7. Chapter 8 covers the new pureXML capabilities, while Chapter 9 discusses the SQL PL programming language. Database concurrency is discussed in Chapter 10. • Part 3 — DB2 Database Administration (Chapters 11–14). Creating a DB2 database and its related table spaces is covered in Chapter 11. Copyright © 2007, 2008 IBM 2
    • DB2 Database Demonstration Program Version 9.5 The common administration tasks are discussed in Chapters 12 and 13. Database monitoring and performance considerations are discussed in Chapter 14. • Part 4 — Developing Applications with DB2 (Chapters 15–16). An introduction to application development for DBAs is given in Chapter 15. Chapter 16 deals with some of the DBA activities that are related to application development. Not all of the material in these chapters is necessary for you to pass your certification test, but it will definitely help you when applications go into production. This book can be used as a self-study guide to help you prepare for the DB2 certification exams, or as a guide to DB2 on the Linux, UNIX, and Windows platforms. The DB2DEMO program, along with the book, are great tools for helping you learn DB2 and obtaining your DB2 Certification! For more details on the DB2 certification program, visit www.ibm.com/certify. Copyright © 2007, 2008 IBM 3
    • DB2 Database Demonstration Program Version 9.5 Installation Requirements This program is meant to be used for demonstrating the functionality of the DB2 UDB V9 product. In order to use this program, you need the following configuration: • Windows Operating System (Windows 2000/XP/2003/Vista ) • Browser (Internet Explorer, Firefox, or any suitable browser) • Access to a DB2 system with the SAMPLE database Your workstation or laptop should have a minimum of 384M of memory to run Windows and DB2, although more than 512M is ideal. The DB2DEMO program itself needs approximately 3MB of disk space for the program and help files, but this can grow to 20MB to hold the sample tables that are created during the demonstration. The program will work with DB2 Version 7+, but not all features will work if you use a down-level server. In addition to having a DB2 server available, the SAMPLE database must be created beforehand, otherwise the program will not be able to run any of the examples. The SAMPLE database is normally created as part of the First Steps program after the DB2 installation is complete. If you need to create the sample database, use the db2sampl command. While the SAMPLE database is the default database used by the DB2DEMO program, any database can be accessed by the program on all of the DB2 supported platforms, including: • AIX • HP • SUN • Linux (all platforms) • Windows 2000, Windows XP, Windows 2003 • iSeries (DB2 Connect Required) • z/OS (DB2 Connect Required) Although the database can reside on one of these machines, the actual client (demo) must run on Windows 2000/XP/2003/Vista. For details on how to do this, please see the installation procedure section. Note: The DB2DEMO program can also be used against other DB2 databases in your environment, but many of the examples are strictly for the DB2 on the Linux, UNIX, and Windows platforms. Copyright © 2007, 2008 IBM 4
    • DB2 Database Demonstration Program Version 9.5 Installing the DB2DEMO Program Installation File The DB2DEMO installation program consists of only one file that contains the executable along with all of the supporting files required to run the program. The file name is the same whether you downloaded this program from the internet or found it on a CD-ROM: • DB2DEMOSETUP.EXE - Installation program for the DB2DEMO program Before beginning the installation, make sure that you have about 10M of disk space available (half of this is temporary space that will be released when the installation is complete). Setup and Installation of the Program From within the directory that you found the DB2DEMOSETUP program (either the CD- ROM or on your hard drive), you double-click your left mouse button on this file name, or execute it from a command line: • C:DOWNLOADS>DB2DEMOsetup.exe After clicking on the DB2DEMOSETUP program, there will be some temporary messages displayed while the program unpacks some files, and then you will be presented with the first installation screen: Copyright © 2007, 2008 IBM 5
    • DB2 Database Demonstration Program Version 9.5 Make sure that you have exited any programs that may be currently running (just to be on the safe side) and the hit OK to continue on to the next step. The next screen gives you the copyright and legal information for the program. Please read it and say "YES" to continue: Copyright © 2007, 2008 IBM 6
    • DB2 Database Demonstration Program Version 9.5 The next screen that appears is the directory screen: Copyright © 2007, 2008 IBM 7
    • DB2 Database Demonstration Program Version 9.5 Select a drive and directory to place the DB2DEMO program into. By default, the name of the directory is called C:Program FilesDB2DEMO and it is placed on the C: drive. The above example shows how the installation directory can be changed. Use the Drives and Directories list boxes to change the value of the field to point to the installation directory you want. When you are ready to go, hit the NEXT button. At this point in time, the installation program will ask you for the Program Group that the DB2DEMO program will be placed into: Once you have selected the group name, the program will confirm the installation information: Copyright © 2007, 2008 IBM 8
    • DB2 Database Demonstration Program Version 9.5 Once you hit the continue button, the program will begin copying files: Copyright © 2007, 2008 IBM 9
    • DB2 Database Demonstration Program Version 9.5 When copying is complete, the final completion box will be displayed: Depending on which operating system you were installing on, you may be asked to reboot the machine, or be given an option to try out the demo program or look at the additional README information that is supplied with the program. You can also start up DB2DEMO by going into the DB2DEMO group and selecting the DB2DEMO icon from the DB2DEMO group (or whatever you called it) and clicking on it: To see how the program works, check out the section on running the program. If you want to run the DB2DEMO program against another server, please read the instructions on customization. Advanced Installation The SAMPLE database can be installed on any server supported by DB2. The program that creates that sample database is called db2sampl and can be found in the sqllibbin directory on your server. When you install the database on a different machine, you still need to use the DB2DEMO program on Windows 2000 or Windows XP, but the data will be on the server instead of the local machine. Copyright © 2007, 2008 IBM 10
    • DB2 Database Demonstration Program Version 9.5 In order to install this on a different server, you need to be very familiar with DB2 commands and the security of the machine you are working on. The steps required to run this demo against a different server are: 1. Install DB2 on the server operating system 2. Create a privileged userid that can administer the DB2 system 3. Create the sample database on the system 4. Create a userid on this system that can be used to connect from the remote system 5. Set up the Windows client so that the SAMPLE database has been catalogued properly. This includes installing the DB2 Client Application Enabler code on the workstation. Without this code, the demonstration program cannot run. Once the installation is complete, you should be able to run the DB2DEMO program from the client and connect to the remote SAMPLE database. Uninstalling the Demonstration To uninstall the DB2DEMO program, use the Add/Delete panel within the Services group to delete the application: Select the DB2 Demonstration program and the various files will be deleted. The directory may not be deleted if you have personalized any of the files. Support We've tried to think of everything, but occasionally things go wrong. If you have a problem with the demonstration code, please send us a note with your email address, name and a description of the problem. We can be reached at baklarz@ca.ibm.com. Copyright © 2007, 2008 IBM 11
    • DB2 Database Demonstration Program Version 9.5 Using the DB2DEMO Program Starting the Program To start the demonstration program, go either to a command or use Windows explorer to start the DB2DEMO program in the DB2DEMO directory (or wherever you chose to place it). Or you can run it from a command line: • DB2DEMO [filename.sql] {option1=value option2=value ...} Once you have started the program, you will see the introduction screen: The default database for the connection is SAMPLE. The DB2Demo scripts will be automatically loaded once you hit CONNECT. In the event that the program cannot connect to the database, it will issue an error message asking whether or not DB2 should be started: Copyright © 2007, 2008 IBM 12
    • DB2 Database Demonstration Program Version 9.5 Selecting yes will attempt to start the local DB2 instance (remote instances are not supported). If no is pressed, the program will return to the connection panel. You can choose a different database from the list, or adjust your userid and password and try connecting again. If you press CANCEL, the DB2DEMO.SQL script will be loaded and then the main DB2DEMO screen displayed. Note that no SQL will run until a subsequent connection to a database is established. A number of brief messages will display, and finally the demonstration screen will be displayed. Note: The program will use a number of defaults to start up: • password= • userid= • database="SAMPLE" • file="DB2DEMO.SQL" • font="Tahoma" • fontsize="8" • schema=(userid if blank) • sqllib="c:program filesibmsqllib" or DB2PATH value if set • instance="DB2" or DB2INSTANCE value if set If the DB2DEMO.SQL file cannot be found, the program will not display an error message. Instead, it will only show the SQL window. Copyright © 2007, 2008 IBM 13
    • DB2 Database Demonstration Program Version 9.5 Overview of the Panels The demonstration program is divided into two major panels. On the far left-hand side is the scripting panel which contains: • SQL Commamds (scripts) • Help This scripting panel can be moved and resized independently from the SQL panel. Note that this panel is optional and does not need to be shown in order to use the SQL panel. The right section of the demonstration program contains the SQL panel. The panel can be divided into 4 parts: • SQL Input • Error Messages • Output • Status Indicator The SQL panel can be resized and moved around independent of the scripting panel. Finally, there is a toolbar on the top of the SQL panel that allows you to change the operation of the program. Copyright © 2007, 2008 IBM 14
    • DB2 Database Demonstration Program Version 9.5 In addition to these screens, there are a number of windows which will be displayed depending on what you are doing: • Performance Monitor • Graphing/Plotting Menu • XML/Long string display The following section describes the function of each of the windows found in the Scripting panel. Scripting Panel The window is only shown when the DB2DEMO script (or any other script) is loaded into the program. The top section of the scripting panel contains various DB2 scripts that demonstrate features of the program. The bottom section contains any help information associated with the example. Copyright © 2007, 2008 IBM 15
    • DB2 Database Demonstration Program Version 9.5 Command Window The command window contains all of the examples of SQL that are demonstrated in the DB2Demo program. By default, the DB2Demo program will automatically execute the SQL found in the command window when you click on an item. If you want to stop automatic execution, change the auto run option in the SQL panel. In order to execute one of the sample SQL commands, you need to click on one of the sections shown in the SQL Example. If you click on a [+] sign, it will expand to show the various SQL commands: When you click on an SQL command, it will have the SQL statements in the example placed into the SQL Input window and executed immediately if the Auto run option is set. You can change this behavior if you want to read about the SQL before it gets executed (see the Auto run option). If you click on the [-] when the list is already opened, it will close up again into a single item. Clicking on any of the items in command window will also refresh the SQL information box. Copyright © 2007, 2008 IBM 16
    • DB2 Database Demonstration Program Version 9.5 Usually this box will contain information on the command that is being executed. You can use the scroll bars to go up and down to see what the SQL is trying to accomplish. When the SQL executes, the DB2 Input message window will change to "Running" and then be updated with any error codes. Always take a look at this window to determine what the status of the SQL is. Refresh There are two buttons found at the top of the Script panel: Refresh and Search. The Refresh option is the first of the two buttons: . This button will reload the entire set of scripts that are currently in the panel. You can use this button to collapse all of the examples lists, or after having found some scripts with the search button. The other reason for using the refresh button is to reload examples that you have modified. Right-clicking on an example line will display the contents of that script in the Notepad editor: Copyright © 2007, 2008 IBM 17
    • DB2 Database Demonstration Program Version 9.5 You can make changes to the script and save it back to disk. However, the changes will not be reflected in the script that is found in the DB2DEMO program until you press the refresh button. Search The Search option is found next to the refresh button: This button allows you find all of the scripts (examples) in the current set of SQL statements that have the keyword that you are looking for: When a search term is entered, the set of commands in the command window is expanded to show the individual examples that have the keyword in the description line. For instance, the normal command window looks similar to the following screen: The search field is filled in with "union" and the find button pressed. Copyright © 2007, 2008 IBM 18
    • DB2 Database Demonstration Program Version 9.5 This will result in the command window being modified to show the first example with "union" in the description highlighted: The search field turns green to indicate that a value was found. In addition to highlighting the example, the help panel gets updated, along with the SQL window. The actual SQL does not get executed, as normally would be case if you clicked on an example. Subsequent values of the keyword can be found by continuing to hit the FIND button on the search panel. The program will continue to search the scripts until it can longer find the keyword. In the event that a keyword cannot be found, the field will turn red: Copyright © 2007, 2008 IBM 19
    • DB2 Database Demonstration Program Version 9.5 SQL Input Window The DB2 Input window is used to display and execute commands. You can enter any SQL or XQuery in this input window and then hit the RUN key to execute it. Note that XQuery commands must always start with XQUERY in order for DB2 to properly execute it. Near the bottom of this screen is the message panel which gets updated with status information: If you want additional error information, click anywhere in the status box and a larger error description will be displayed: Copyright © 2007, 2008 IBM 20
    • DB2 Database Demonstration Program Version 9.5 Note that the larger error message is only available when running with DB2 9 and greater. At the top of the SQL Input window are a number of buttons. The buttons (from LEFT to RIGHT) are: • Run SQL When you hit the Run SQL button it will submit the SQL to DB2 to execute. The types of SQL that you can execute from this program are: UPDATE, INSERT, DELETE, CREATE, DROP, DECLARE, VALUES, GRANT, REVOKE, WITH, XQUERY You cannot run a LOAD, CONNECT or any utility from this screen. Generally, most SQL will run. The worst that can happen is you get an error message back from DB2! To enter a SQL statement in this window, place the cursor in the input area and click with the LEFT mouse button, and then start typing. You can separate multiple SQL commands by placing a ";" at the end of each statement: select * from employee; select * from department; Occasionally you need to use a different delimiter. Triggers and SQL PL stored procedures make use of the semi-colon (;) as a delimiter between multiple statements. In order to support this form of SQL, you can substitute a "#", "$", or "@" sign instead. To do this, use the "#" as the first character of your SQL statement and always place that same character at the beginning of each of your SQL statements in that block. For instance: #select * from employee #select * from department When you hit the RUN SQL button, the message window will change to RUNNING and then will show the final message when the SQL is complete. If there is any OUTPUT from a command, the OUTPUT window will be updated. This output window allows both horizontal and vertical scrolling of data. Note that output in columns is limited to stop excessive data from being returned on SELECT statements. Copyright © 2007, 2008 IBM 21
    • DB2 Database Demonstration Program Version 9.5 By default, DB2Demo limits the number of rows returned by any answer set to 1,000. If the maximum row count is exceeded, the program will issue a warning message: By pressing YES, the program will return all rows back to the program. If there are a large number of rows in the answer set, this could take a long time. An additional message is displayed at 10,000 rows, just in case you change your mind! There are additional Non-SQL commands that you can issue in this window: o %VIEW SELECT ... This command will let you view a field in the database that is larger than 255 characters. The field is extracted from the SELECT statement and then placed into a separate window. o Other commands More advanced commands can be found in the Advanced Programming section in the online documentation. These additional commands let you load new scripts into the program, run operating system commands, create menus and a variety of other tasks. • Load Script The Load Script button will load a new SQL file into the DB2Demo program. When you want to load a new set of SQL commands, click on the File button and then select the file you want to load from the menu (next page): Copyright © 2007, 2008 IBM 22
    • DB2 Database Demonstration Program Version 9.5 When you hit the LOAD button, the file will be loaded into the demonstration program. If you don't want to change the current set of SQL, just click on the cancel button. If the file contains valid DB2DEMO scripts, the SCRIPT panel will get updated. If the program cannot determine the type of file, it will place the contents of the file into the SQL input area. • Clear SQL The Clear button clears all SQL from the input area. • Clear and Paste The Clear and Paste button will clear the contents of the current SQL window and place the contents of the clipboard into it. If you don't want to clear the contents of the existing window, you should use the standard Window shortcuts - Cntl-Insert and Shift-Insert to cut and paste. • Show last command (5) The re-cycle button with a 5 in the middle tells the program to retrieve the last SQL command issued. It keeps a list of the last 5 commands that were typed in. • Explain SQL DB2 has the Visual Explain facility which gives you a graphical snapshot of the way a transaction will run in the database engine. Unfortunately, this utility can only be invoked directly through the Control Center! Instead of using the graphical explain, this button will invoke a textual explain facility which will display a character (text) representation of how a statement will Copyright © 2007, 2008 IBM 23
    • DB2 Database Demonstration Program Version 9.5 execute. While not as detailed as a Visual Explain, it can give you some valuable insight into how the statement will execute. Consider the following SQL statement in an SQL window: Here is the corresponding explain output: • Plot Performance By clicking on this button, the command in the SQL input window will be executed 20 times and the response time plotted in a graph. See the section on Performance for more information. Copyright © 2007, 2008 IBM 24
    • DB2 Database Demonstration Program Version 9.5 • Connect If you want to connect to a different database, select the Connection option. This will bring up the following screen: When you hit the Connect button the program will attempt to connect to the database using the userid and password that you have supplied. If you do not supply a userid or password, your default userid will be used as part of the connection. • Autorun On/Off When you click on an example in the SCRIPT panel, it will have the SQL statements in the example placed into the SQL Input window and executed immediately if the Autorun button is set. You can change this behavior if you want to view the SQL before it gets executed. Pressing the key will change it to the stop icon . • Font Size If you want to increase the font size, click on the Font Size button. The size of the font will increase from a size of 8 points up to 20 points in increments of 2. Once you click past 20 points, it will go back down to 8 points. To change the font size to something outside this range, see the Font button. Copyright © 2007, 2008 IBM 25
    • DB2 Database Demonstration Program Version 9.5 • Font Type The fonts used by the program are controlled by this menu. When pressed, a panel will appear that gives the user the opportunity to change the size of the font and the type of font used in the SQL input window: • Column Width By default, the column width is limited to a maximum of 15 characters. This value can be changed to 20, 25, 30, or cycled back to 10 and then 15. The column width in the output window can be manually changed by dragging the line between columns to either the right or left. If the column values are too big to display, the column will be highlighted in light blue. In order to view the entire value of the column, either expand the size of the column or click on the value you want to view. This will place the value of the column into a separate window. • Column Auto-Complete The Column Auto-complete feature automatically spells out column names when a period is pressed after a table name. By default this feature is on. To turn it off, click on the button and it will change to the off setting . When typing in a SELECT statement, if the program detects a table name, it will attempt to automatically complete the column names for you. For instance, the following screen shows the table name EMPLOYEE typed into the SQL input window: Once a period (.) is typed after the EMPLOYEE table name, the first column name in the table is appended after the period. Copyright © 2007, 2008 IBM 26
    • DB2 Database Demonstration Program Version 9.5 Hitting the period (.) again will cycle through the list of all of the columns in the EMPLOYEE table. The next column is shown: Hitting the ESCAPE key will cause the field to disappear and the EMPLOYEE table name remain with the period behind it: As the remainder of the SQL statement is being built, a period at any time will result in the next column in the table being placed into the SQL text: If you need to type in a real period (for a decimal number for instance), use a zero before the decimal point (0.4 instead of .4). You can also press the ESCAPE button and the decimal will remain without a column name. Hitting the ESCAPE key will cause the field to disappear and the EMPLOYEE table name remain with the period behind it: As the remainder of the SQL statement is being built, typing a period at any time will result in the next column in the table being placed into the SQL text: If you need to type in a real period (for a decimal number for instance), use a zero before the decimal point (0.4 instead of .4). You can also press the ESCAPE key and the decimal will remain without a column name. In addition to using the period to step through all of the column names, you can also key in the first letter of the column to quickly display it on the screen. For instance, returning to the original example of EMPLOYEE. The first column displayed is EMPNO: Copyright © 2007, 2008 IBM 27
    • DB2 Database Demonstration Program Version 9.5 Typing the letter "s" or "S" will result in the display changing to SEX: Pressing "s" again will change this to SALARY: If a letter cannot be found in the column names, nothing will be displayed. You can still press ESCAPE to back out the period and type other characters. • Trace statements off Trace statements on Clicking on the Trace statements button will open up an additional window. This window will contain information on every SQL statement executed, including the SQL text and the return code for the statement. This window can be used to retrieve old commands (rather than using the Recycle button). For more information on the trace window, see the online documentation. SQL Output Window Copyright © 2007, 2008 IBM 28
    • DB2 Database Demonstration Program Version 9.5 The SQL Output panel shows the results of the query done in the SQL Input window. To resize a column, click on the column separator on the title line (column descriptions) and move it to the right or left. This will re-size the individual column. If one of the columns is too large to display on the screen (shown in light blue), you can left click on the column to have the value placed into a separate window. For instance, many of the XML examples produce strings that are too long to display in a normal window. The DB2Demo program has the ability to format the XML to make it easier to read. For instance, the following panel contains an SQL statement that creates a large XML string: This SQL results are shown below: This does not lend itself well to understanding the structure of the resulting XML! By clicking on the large character column, DB2Demo will format it into a separate window that is easier to view: Copyright © 2007, 2008 IBM 29
    • DB2 Database Demonstration Program Version 9.5 Performance Monitoring The performance screen is used to see how fast SQL transactions run. To use this performance chart, first execute an SQL command in the SQL Input window. Then, click on the performance button to start the performance graph. When you click on this button, the SQL found in the SQL Input window will run 20 times (no output is displayed during multiple executions) and the performance will be charted. Note that the plot shows the number of milliseconds taken to execute the command and the number at the top right-hand corner is the average execution time of the command. To stop a performance plot, click on the plot itself. To close the Performance screen, click on the close button at the top of the panel. Copyright © 2007, 2008 IBM 30
    • DB2 Database Demonstration Program Version 9.5 DB2DEMO Program Credits This program and documentation was compiled and created by: George Baklarz DB2 Worldwide Presales Technical Support IBM Toronto Laboratory Markham, ON, CANADA I hope you enjoy using this demonstration package, and if you have any questions or comments, please send them to me at: baklarz@ca.ibm.com Thank-you for your time in trying out the DB2 Database Product! Copyright © 2007, 2008 IBM 31