MELJUN CORTES DATA & Information

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MELJUN CORTES DATA & Information

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MELJUN CORTES DATA & Information

  1. 1. DATA ARE THE RAWMATERIALS FROMWHICH INFORMATION DERIVED.INFORMATION IS THE RESULT FROMTHOUGHTFUL ANALYSIS, MANIPULATION,AND PRESENTATION OF DATA IN A FORMTHAT WILL ENHANCE THE DECISION-MAKINGPROCESS. MELJUN CORTES
  2. 2. DATA INFORMATIONINPUT OUTPUT PROCESS PREPARED BY: Mary Ann Bernadette Taduyo
  3. 3. TYPES OF DATA NUMERIC CONSISTS OF NOS. & DECIMALPOINTS, AS WELL AS THE PLUS (+) & MINUS (-) SIGNS. TEXT/TEXTUAL/ALPHANUMERICCAN CONTAIN ANY COMBINATION OF LETTERS,NOS., & SPECIAL CHARACTERS. USUALLYORGANIZED IN WORDS, SENTENCES & PARAGRAPHS. AUDIO-VISUAL DATA IN THE FORM OFVOICES & MUSIC, INCLUDING, GRAPHS, DRAWINGS& VISUAL IMAGES. PHYSICAL DATA THAT CAN BE CAPTUREDFROM THE ENVIRONMENT SUCH AS LIGHT,TEMPERATURE & PRESSSURE. PREPARED BY: Mary Ann Bernadette Taduyo
  4. 4. QUALITIES OF INFORMATION ACCURACY - refers to the degree to whichinformation is free from error. VERIFIABILITY - to ascertain that the result iscorrect or that a procedure or sequence of operationshave been performed. COMPLETENESS - refers to the degree to whichinformation is free from omissions. TIMELINESS - refers to the time sensitivity ofinformation. RELEVANCE - refers to the appropriateness of theinformation as input for a particular decision. ECONOMICAL - refers to the cost of ownership. PREPARED BY: Mary Ann Bernadette Taduyo
  5. 5. HIERARCHY OF DATA ORGANIZATION BIT BYTE / CHARACTER FIELD / DATA ELEMENT RECORD FILE DATABASE PREPARED BY: Mary Ann Bernadette Taduyo
  6. 6. HIERARCHY OF DATA ORGANIZATIONBIT a binary digit - 0 or 1.BYTE/CHARACTER a group of adjacent bits (consisting of 8 bits) configured to represent a character or symbol. Configured according to an encoded system such as ASCII or EBCDIC. ASCII = American Standard Code for Information Interchange. EBCDIC = Extended Binary Coded Decimal Interchange Code. PREPARED BY: Mary Ann Bernadette Taduyo
  7. 7. HIERARCHY OF DATA ORGANIZATIONFIELD/DATA ELEMENT the smallest logical unit of data. Also called ATTRIBUTE/CATEGORY.RECORD a collection of related fields describing an event or an item.FILE a collection of related records.DATABASE a collection of related files. the integrated data resource for a computer-based information system. has the characteristic of being integrated & shared. PREPARED BY: Mary Ann Bernadette Taduyo
  8. 8. PREPARED BY: Mary Ann Bernadette Taduyo
  9. 9. PREPARED BY: Mary Ann Bernadette Taduyo
  10. 10. PREPARED BY: Mary Ann Bernadette Taduyo
  11. 11. PREPARED BY: Mary Ann Bernadette Taduyo
  12. 12. PREPARED BY: Mary Ann Bernadette Taduyo
  13. 13. DATA/DATABASE MANAGEMENT ENCOMPASSES THE STORAGE, RETRIEVAL & MANIPULATION OF DATA. IT CAN APPLY TO THE WAYS IN WHICH INFORMATION IS CATALOGUED, STORED & USED.SYSTEM ANY GROUP OF COMPONENTS (FUNCTIONS, PEOPLE, ACTIVITIES, & SO ON) THAT INTERFACE WITH & COMPLEMENT ONE ANOTHER TO ACHIVE ONE OR MORE PREDEFINED GOALS. PREPARED BY: Mary Ann Bernadette Taduyo
  14. 14. DATA SYSTEM A COMPUTER-BASED RECORD KEEPING SYSTEM WHOSE OVERALL PURPOSE IS TO RECORD & MAINTAIN INFORMATION. IT IS A COMPUTERIZED SYSTEM IN WHICH A COLLECTION OF STORED DATA IS INTEGRATED, SHARED & USED FOR MULTIPLE PURPOSES.DATABASE MANAGEMENT SYSTEM (DBMS) A COMPUTER-BASED SYSTEM USED TO MANAGE DATABASE OR FILES. IT IS THE SOFTWARE COMPONENT OF A DATABASE SYSTEM. ALSO CALLEDDATABASE MANAGER. A SOFTWARE SYSTEM FOR ORGANIZING, STORING, RETRIEVING, ANALYZING & MODIFYING INFORMATION IN A DATABASE.Mary Ann Bernadette Taduyo PREPARED BY:
  15. 15. IMPORTANCE OF DBMS COMPACTNESS SPEED LESS DRUDGERY ACCURACY GREATER ACCESS TO INFORMATION BETTER CONTROL (DATA SECURITY) MORE EFFICIENT SOFTWARE DEV’T. PREPARED BY: Mary Ann Bernadette Taduyo
  16. 16. RELATIONAL DATABASE A DATABASE INWHICH DATA ARE ACCESSED BY CONTENT RATHERTHAN BY ADDRESS. IN CONDUCTING SEARCHES, A RELATIONALDATABASE MATCHES INFORMATION FROM A FIELDIN ONE TABLE WITH INFORMATION IN ACORRESPONDING FIELD OF ANOTHER TABLE TOPRODUCE A THIRD TABLE THAT COMBINESREQUESTED DATA FROM BOTH TABLES. PREPARED BY: Mary Ann Bernadette Taduyo
  17. 17. RELATIONAL DATABASE MANAGEMENTSYSTEM (RDBMS) A RELATIONAL DATABASEMANAGEMENT PROGRAM, ESP. ONE THAT COMESWITH ALL THE NECESSARY SUPPORT PROGRAMS,PROGRAMING TOOLS, & DOCUMNETATION NEEDEDTO CREATE, INSTALL, & MAINTAIN CUSTOMDATABASE APPLICATION. A DBMS WHEREBY THE DATABASE CONSIST OFONE OR MORE RECTANGULAR TABLES OF ROWS &COLUMNS, DATA RECORDS IN DIFFERENT FILES. A DATABASE MANAGER THAT DRAWSINFORMATION FROM DIFFERENT TABLES (DATABASEFILES LINKED BY A COMMON FIELD.RELATIONAL DATABASE MANAGER. PREPARED BY: Mary Ann Bernadette Taduyo
  18. 18. FUNCTIONS OF RDBMS Creates a database structure containing fields, tables, & table relationships. Easily add new records, change field values in existing records, & delete records. Contains a built-in query language, which lets you obtain immediate answers to the questions you ask about your data. Contains a built-in report generator, which lets you produce professional- looking, formatted reports from your data. Provides protection of databases through security, control,PREPARED BY: Mary Ann Bernadette Taduyo & recovery facilities.
  19. 19. DATA INDEPENDENCE IN A DATABASE MANAGEMENT, THE STORAGE OF DATA IN A WAY THAT ENABLES YOU TO ACCESS THAT DATA WITHOUT KNOWING EXACTLY WHERE IT ITS LOCATED OR HOW IT IS STORED. IN RDBMS, THE GOAL IS TO ORGANIZE INFORMATION ECONOMICALLY INTO TABLES (WITHOUT UNNECESSARY DUPLICATION OR WASTE OF SPACE) & IN A WAY THAT ENABLES EACH TABLE TO OPERATE AS INDEPENDENTLY AS POSSIBLE.DATA REDUNDANCY THE REPETITION OF THE SAME DATA IN 2 OR MORE RECORDS. PREPARED BY: Mary Ann Bernadette Taduyo
  20. 20. DATA INTEGRITY THE ACCURACY, COMPLETENESS, & INTERNAL CONSISTENCY OF THE INFORMATION STORED IN A DATABASE. IT SHOULD HAVE THE STANDARDS OF COMFORT, CLARITY, & CONSISTENCY.DATA MANIPULATION THE USE OF THE FUNDAMENTAL DATABASE INFORMATION OPERATIONS — DATA DELETION, DATA INSERTION, DATA MODIFICATION, & DATA RETRIEVAL — TO MAKE CHANGES TO DATA RECORDS. PREPARED BY: Mary Ann Bernadette Taduyo
  21. 21. SEQUENTIAL ACCESS AN INFORMATION STORAGE & RETRIEVAL TECHNIQUE IN WHICH THE COMPUTER MUST MOVE THROUGH A SEQUENCE OF STORED DATA ITEMS TO REACH THE DESIRED ONE.RANDOM ACCESS AN INFORMATION STORAGE & RETRIEVAL TECHNIQUE IN WHICH THE COMPUTER MUST CAN ACCESS THE INFORMATION DIRECTLY, WITHOUT HAVING TO GO THROUGH A SEQUENCE OF LOCATION. ALSO CALLED DIRECT ACCESS. PREPARED BY: Mary Ann Bernadette Taduyo
  22. 22. What is OpenOffice.org Base?• In OpenOffice.org Base, you can access data that is stored in a wide variety of database file formats. OpenOffice.org Base natively supports some flat file database formats, such as the dBASE format. You can also use OpenOffice.org Base to connect to external relational databases, such as databases from MySQL or Oracle.• The following database types are read-only types in OpenOffice.org Base. From within OpenOffice.org Base it is not possible to change the database structure or to edit, insert, and delete database records for these database types: – Spreadsheet files – Text files – Address book data PREPARED BY: Mary Ann Bernadette Taduyo
  23. 23. Features of OpenOffice.org Base• Data Entry and update. Access provides easy mechanisms for adding, changing, and deleting data, including the ability to make mass changes in a single operation.• Queries (questions). Access makes it easy to ask complex questions concerning data in the database and receive instant answers. PREPARED BY: Mary Ann Bernadette Taduyo
  24. 24. Features of OpenOffice.org Base• Forms. Access can produce attractive and useful forms for viewing and updating data.• Reports. Access contains a feature to allow easy creation of sophisticated reports for presenting data. PREPARED BY: Mary Ann Bernadette Taduyo
  25. 25. Features of OpenOffice.org Base• Web Support. Access allows saving of objects (e.g. tables, reports) in HTML format to be viewed using a browser. Data access pages can be created to allow real-time access to data in the database via the Internet. PREPARED BY: Mary Ann Bernadette Taduyo
  26. 26. *** OOo.Base DATABASE WINDOW ***TABLES - The heart of each database is its tables. A tables is alot like spreadsheet. Each row is a record Each column The intersection is a field of a row and column is a CELL PREPARED BY: Mary Ann Bernadette Taduyo
  27. 27. QUERIES - A query provides you with a way of weeding out theinformation you don’t what to see, so that you can more clearly seethe information you do need. Queries is associated with values andcriteria PREPARED BY: Mary Ann Bernadette Taduyo
  28. 28. FORMS - All data you enter into your database ends up in a tablefor storage. A form resembles any fill-in-blanks sheet that youmight complete by hand such as job application. PREPARED BY: Mary Ann Bernadette Taduyo
  29. 29. REPORTS - While forms are designed to be used on-screen,reports are designed to be printed. Reports are especiallyformatted collections of data, organized according to yourspecifications. PREPARED BY: Mary Ann Bernadette Taduyo
  30. 30. WIZARDS - It’s a mini program that “interviews” you, asking youquestion about what you want to accomplish. The it takes youranswers and creates the table, report, query, or whatever accordingto your specifications. PREPARED BY: Mary Ann Bernadette Taduyo
  31. 31. Normalizing your Database PREPARED BY: Mary Ann Bernadette Taduyo
  32. 32. Data Normalization• Makes tables as efficient and compact as possible to eliminate the possibility for confusion and error. PREPARED BY: Mary Ann Bernadette Taduyo
  33. 33. First Two Normalization Rules1) Avoid Repeated Information2) Avoid Redundant Data PREPARED BY: Mary Ann Bernadette Taduyo

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