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  1. 1. MYSQL <ul><li>MYSQL Install
  2. 2. Data Management
  3. 3. Advantage
  4. 4. Disadvantage
  5. 5. Commands </li></ul>
  6. 6. MySQL Presented by Jordan Nedelchev, FN: Course: Modern Software Technologies
  7. 7. MySQL The principal author Monty Widenius
  8. 8. WHAT IS MYSQL <ul><li>Free SQL (Structured Query Language) database server.
  9. 9. licensed with the GNU General public license
  10. 10. MySQL is a database management system.
  11. 11. MySQL is a relational database management system.
  12. 12. MySQL is Open Source Software. </li></ul>
  13. 13. THE IDEA <ul><li>Client PC mysql client mysql
  14. 14. Server PC MySQL Server safe_mysqld
  15. 15. QUERY
  16. 16. RESPONSE
  17. 17. Separate the logical part of the queries from the implementation logicalgly, and phisically. </li></ul>
  18. 18. HISTORY <ul><li>The authors started to use mSQL, but they came to the conclusion that mSQL as not fast enough and not flexible enough to face their needs.
  19. 19. The reslt is a new SQL server - MySQL
  20. 20. The name MySQL The directories &quot;my” Monty's daughter My </li></ul>
  21. 21. MAIN SUPPORTED PLATFORMS <ul><li>First developed for Solaris and RedHat Linux .
  22. 22. FreeBSD.
  23. 23. OpenBSD.
  24. 24. Mac OS X Server.
  25. 25. Win95, Win98, NT, and Win2000.
  26. 26. All modern systems with working Posix threads and a C++ compiler. </li></ul>
  27. 27. DOWBNLOAD <ul><li> Download instructions
  28. 28.
  29. 29. RedHat and SuSe Linux distributions.
  30. 30. Beginners MySQL Tutorial on how to install and set up MySQL on a Windows machine. </li></ul>
  31. 31. INSTALLATION <ul><li>Under RedHat Linux from an RPM package (install as root) rpm -i MySQL-VERSION.i386.rpm MySQL-client-VERSION.i386.rpm
  32. 32. Under any (other) Linux (install as root) groupadd mysql useradd -g mysql mysql cd /usr/local gunzip < /path/to/mysql-VERSION-OS.tar.gz | tar xvf - ln -s mysql-VERSION-OS mysql cd mysql scripts/mysql_install_db chown -R mysql /usr/local/mysql chgrp -R mysql /usr/local/mysql bin/safe_mysqld --user=mysql & </li></ul>
  33. 33. START MYSQL Server As root under Linux with the command safe_mysqld &
  34. 34. START A MYSQL CLIENT <ul><li>Without using passwords (when the password for the specified user is empty) mysql -u <user> -h <Host>
  35. 35. Using passwords mysql -u <user> -h <Host> -p Example: mysql -u root -h localhost
  36. 36. Exitting with the command quit or exit . </li></ul>
  38. 38. USE databaseName;
  39. 39. SHOW TABLES;
  40. 40. DESCRIBE table;
  41. 41. SELECT * FROM table;
  42. 42. SELECT * FROM table G
  43. 43. CREATE DATABASE databaseName;
  44. 44. DROP DATABASE databaseName;
  45. 45. CREATE TABLE tableName(name1 type1, name2 type2, ...);
  46. 46. DROP TABLE tableName;
  47. 47. INSERT INTO TABLE VALUES( value1, value2, ...);
  48. 48. SELECT field1, field2, ... FROM tableName;
  49. 49. SELECT * INTO OUTFILE 'C:/tmp/skr.txt' FROM skr;
  50. 50. LOAD DATA INFILE /path/file.txt INTO TABLE skr; </li></ul>
  51. 53. GRANT PRIVILEGES <ul><li>Change the password of the MySQL's administrator (root) mysql -u root mysql UPDATE USER SET Password=password('new_password’) WHERE user='root'; FLUSH PRIVILEGES; OR SET PASSWORD FOR root=PASSWORD('new_password'); </li></ul>
  52. 54. Main Features <ul><li>Fully multi-threaded using kernel threads.
  53. 55. Works on many different platforms.
  54. 56. Many column types
  55. 57. Very fast joins using an optimized one-sweep multi-join
  56. 58. Full operator and function support in the SELECT and WHERE parts of queries.
  57. 59. You can mix tables from different databases in the same query.
  58. 60. A privilege and password system that is very flexible and secure.
  59. 61. Handles large databases.
  60. 62. Tested with a broad range of different compilers. (C/C++)
  61. 63. No memory leaks.
  62. 64. Full support for several different character sets. </li></ul>
  63. 65. Documentation <ul><li>
  64. 66.
  65. 67. As text manual.txt
  66. 68. As HTML manual_toc.html
  67. 69. As GNU Info
  68. 70. As PostScript </li></ul>
  69. 71. ADVANTAGES <ul><li>very fast
  70. 72. reliable and easy to use
  71. 73. multi-threaded multi-user and robust SQL database server. </li></ul>
  72. 74. DISADVANTAGES <ul><li>Missing Sub-selects.
  73. 75. MySQL doesn't yet support the Oracle SQL extension: i SELECT ... INTO TABLE , but supports INSERT INTO ... SELECT ..
  74. 76. Does not support Stored Procedures and Triggers.
  75. 77. MySQL doesn't support views, but this is on the TODO. </li></ul>
  76. 78. MYSQL COMMANDS To login (from unix shell) use -h only if needed. # [mysql dir]/bin/mysql -h hostname -u root -p Create a database on the sql server. mysql> create database [databasename]; List all databases on the sql server. mysql> show databases; Switch to a database. mysql> use [db name]; To see all the tables in the db. mysql> show tables; To see database's field formats. mysql> describe [table name]; To delete a db. mysql> drop database [database name]; To delete a table. mysql> drop table [table name]; Show all data in a table. mysql> SELECT * FROM [table name];
  77. 79. Returns the columns and column information pertaining to the designated table. mysql> show columns from [table name]; Show certain selected rows with the value &quot;whatever&quot;. mysql> SELECT * FROM [table name] WHERE [field name] = &quot;whatever&quot;; Show all records containing the name &quot;Bob&quot; AND the phone number '3444444'. mysql> SELECT * FROM [table name] WHERE name = &quot;Bob&quot; AND phone_number = '3444444'; Show all records not containing the name &quot;Bob&quot; AND the phone number '3444444' order by the phone_number field. mysql> SELECT * FROM [table name] WHERE name != &quot;Bob&quot; AND phone_number = '3444444' order by phone_number; Show all records starting with the letters 'bob' AND the phone number '3444444'. mysql> SELECT * FROM [table name] WHERE name like &quot;Bob%&quot; AND phone_number = '3444444'; Show all records starting with the letters 'bob' AND the phone number '3444444' limit to records 1 through 5. mysql> SELECT * FROM [table name] WHERE name like &quot;Bob%&quot; AND phone_number = '3444444' limit 1,5; Use a regular expression to find records. Use &quot;REGEXP BINARY&quot; to force case-sensitivity. This finds any record beginning with a. mysql> SELECT * FROM [table name] WHERE rec RLIKE &quot;^a&quot;;
  78. 80. Show unique records. mysql> SELECT DISTINCT [column name] FROM [table name]; Show selected records sorted in an ascending (asc) or descending (desc). mysql> SELECT [col1],[col2] FROM [table name] ORDER BY [col2] DESC; Return number of rows. mysql> SELECT COUNT(*) FROM [table name]; Sum column. mysql> SELECT SUM(*) FROM [table name]; Join tables on common columns. mysql> select lookup.illustrationid, lookup.personid,person.birthday from lookup left join person on lookup.personid=person.personid=statement to join birthday in person table with primary illustration id; Creating a new user. Login as root. Switch to the MySQL db. Make the user. Update privs. # mysql -u root -p mysql> use mysql; mysql> INSERT INTO user (Host,User,Password) VALUES('%','username',PASSWORD('password')); mysql> flush privileges; Change a users password from unix shell. # [mysql dir]/bin/mysqladmin -u username -h -p password 'new-password'
  79. 81. Change a users password from MySQL prompt. Login as root. Set the password. Update privs. # mysql -u root -p mysql> SET PASSWORD FOR 'user'@'hostname' = PASSWORD('passwordhere'); mysql> flush privileges; Recover a MySQL root password. Stop the MySQL server process. Start again with no grant tables. Login to MySQL as root. Set new password. Exit MySQL and restart MySQL server. # /etc/init.d/mysql stop # mysqld_safe --skip-grant-tables & # mysql -u root mysql> use mysql; mysql> update user set password=PASSWORD(&quot;newrootpassword&quot;) where User='root'; mysql> flush privileges; mysql> quit # /etc/init.d/mysql stop # /etc/init.d/mysql start Set a root password if there is on root password. # mysqladmin -u root password newpassword Update a root password. # mysqladmin -u root -p oldpassword newpassword
  80. 82. Allow the user &quot;bob&quot; to connect to the server from localhost using the password &quot;passwd&quot;. Login as root. Switch to the MySQL db. Give privs. Update privs. # mysql -u root -p mysql> use mysql; mysql> grant usage on *.* to bob@localhost identified by 'passwd'; mysql> flush privileges; Give user privilages for a db. Login as root. Switch to the MySQL db. Grant privs. Update privs. # mysql -u root -p mysql> use mysql; mysql> INSERT INTO db (Host,Db,User,Select_priv,Insert_priv,Update_priv,Delete_priv,Create_priv,Drop_priv) VALUES ('%','databasename','username','Y','Y','Y','Y','Y','N'); mysql> flush privileges; or mysql> grant all privileges on databasename.* to username@localhost; mysql> flush privileges; To update info already in a table. mysql> UPDATE [table name] SET Select_priv = 'Y',Insert_priv = 'Y',Update_priv = 'Y' where [field name] = 'user'; Delete a row(s) from a table. mysql> DELETE from [table name] where [field name] = 'whatever';
  81. 83. Update database permissions/privilages. mysql> flush privileges; Delete a column. mysql> alter table [table name] drop column [column name]; Add a new column to db. mysql> alter table [table name] add column [new column name] varchar (20); Change column name. mysql> alter table [table name] change [old column name] [new column name] varchar (50); Make a unique column so you get no dupes. mysql> alter table [table name] add unique ([column name]); Make a column bigger. mysql> alter table [table name] modify [column name] VARCHAR(3); Delete unique from table. mysql> alter table [table name] drop index [colmn name]; Load a CSV file into a table. mysql> LOAD DATA INFILE '/tmp/filename.csv' replace INTO TABLE [table name] FIELDS TERMINATED BY ',' LINES TERMINATED BY ' ' (field1,field2,field3); Dump all databases for backup. Backup file is sql commands to recreate all db's. # [mysql dir]/bin/mysqldump -u root -ppassword --opt >/tmp/alldatabases.sql
  82. 84. Dump one database for backup. # [mysql dir]/bin/mysqldump -u username -ppassword --databases databasename >/tmp/databasename.sql Dump a table from a database. # [mysql dir]/bin/mysqldump -c -u username -ppassword databasename tablename > /tmp/databasename.tablename.sql Restore database (or database table) from backup. # [mysql dir]/bin/mysql -u username -ppassword databasename < /tmp/databasename.sql Create Table Example 1. mysql> CREATE TABLE [table name] (firstname VARCHAR(20), middleinitial VARCHAR(3), lastname VARCHAR(35),suffix VARCHAR(3),officeid VARCHAR(10),userid VARCHAR(15),username VARCHAR(8),email VARCHAR(35),phone VARCHAR(25), groups VARCHAR(15),datestamp DATE,timestamp time,pgpemail VARCHAR(255)); Create Table Example 2. mysql> create table [table name] (personid int(50) not null auto_increment primary key,firstname varchar(35),middlename varchar(50),lastnamevarchar(50) default 'bato');