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Introduction to D atabase Management

Introduction to D atabase Management. A database is an organized collection of related information. Manual Database M ight be found on top of someone’s desk May be difficult to sort Manually find the record and physically make changes Electronic database M ight be found in your cell phone

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Introduction to D atabase Management

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  1. Introduction to Database Management

  2. A database is an organized collection of related information • Manual Database • Might be found on top of someone’s desk • May be difficult to sort • Manually find the record and physically make changes • Electronic database • Might be found in your cell phone • Sorted easily • Electronically find the record and enter the new over the old.

  3. Electronic databases contain at least 1 table • Tables have columns and rows • Each column is called a field • The field name FName has field contents of Jane and John • Each row is called a record • There are 2 records in this table • All of the information in the first record belongs to Jane Do

  4. Other examples • Rolodex on a desk (manual) • Your contact list in your cell phone (electronic) • What database have you heard discussed often at school? • iNow (STI)

  5. iNow • iNow is the database where teachers • Post attendance • Enter grades • Teachers can only see/enter specific information according to their user names and passwords • When I log in, I see my only MY classes

  6. tblClassOffering • ClassOfferingID • ClassName Here are some possible tables and fieldnames in iNow • tblClassEnrollment • EnrollmentID • StudentID • tblStudents • StudentID • FirstName

  7. tblClassOffering • ClassOfferingID • ClassName In this example, these field names could be joined creating a RELATIONAL DATABASE because the field contents are the same. • tblClassEnrollment • EnrollmentID • StudentID • tblStudents • StudentID • FirstName

  8. tblClassOffering • ClassOfferingID • ClassName I could pull out the Student’s name, the identification numbers of the classes he/she is enrolled in, and the classes’ names with one QUERY. • tblClassEnrollment • EnrollmentID • StudentID • tblStudents • StudentID • FirstName

  9. A h What’s a query?????

  10. Queries • A query is an object in a database • To query a database is to question it (ask a question) • Query a database to pull out specific information

  11. Report • A report is another Database Object • A database report may be nicely formatted for printing • A report can be generated from • A table • In alphabetically order by any chosen field • A query • With only specific fields showing • With all fields showing • In any order specified

  12. In Summary • Databases contain: • At least 1 table • Fields (column titles) • Field contents (columns) • Records (rows) • Queries (possibly) • Reports (possibly) • The Database Management System you will work with in BTA is MS Office Access 2007

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