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QBE - Query by Example

QBE - Query by Example. Visual approach for accessing information in a database through use of query templates. Example values are entered into template to represent what access to database is to achieve, such as the answer to a query.

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QBE - Query by Example

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  1. QBE - Query by Example

  2. Visual approach for accessing information in a database through use of query templates. Example values are entered into template to represent what access to database is to achieve, such as the answer to a query. Originally developed by IBM in 1970s [Zloof] and has proved so popular that QBE (or similar) is now provided by most DBMSs. When user constructs a QBE - in background, DBMS creates an equivalent SQL statement. Query-by-Example (QBE)

  3. Introduction to Microsoft Access

  4. SQL View (MS-Access Query)

  5. New Query

  6. Projection

  7. Restriction

  8. Restriction w/ multiple criteria

  9. Join

  10. Totals (Aggregate Functions)

  11. Projecting Expressions

  12. Specifying Criteria

  13. Crosstab Query

  14. Crosstab Query (cont.)

  15. Find Matched Query (duplicates)

  16. Find Unmatched Query (Outer Join)

  17. Autolookup Query

  18. Make-Table Action Query

  19. Delete Action Query

  20. Update Action Query

  21. Append Action Query

  22. End of Lecture End Of Today’s Lecture.

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