1. Chapter 9
Query-by-Example
Pearson Education © 2009

2. Chapter 9 - Objectives The main features of Query-By-Example (QBE).
The types of queries provided by the Microsoft Access DBMS QBE facility.
How to use QBE to build queries to select fields and records.
How to use QBE to target single or multiple tables.
Pearson Education © 2009

3. Chapter 9 - Objectives How to perform calculations using QBE.
How to use advanced QBE facilities including parameter, find matched, find unmatched, crosstab, and autolookup queries.
How to use QBE action queries to change content of tables.
Pearson Education © 2009

4. Query-by-Example (QBE)
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 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.
Pearson Education © 2009

5. Query-by-Example (QBE)
Allows user to:
- Ask questions about data in one or more tables.
- Specify the fields we want in the answer.
- Select records according to some criteria.
- Perform calculations on the data in tables.
- Insert and delete records.
- Modify values of fields.
- Create new fields and tables.
Pearson Education © 2009

6. Introduction to Microsoft Access
Pearson Education © 2009

7. Summary of Microsoft Access Query Types
Pearson Education © 2009

8. Introduction to Microsoft Access Queries
Pearson Education © 2009

9. Building Select Queries using QBE - Specifying Criteria
Pearson Education © 2009

10. Building Select Queries using QBE - Specifying Criteria
Pearson Education © 2009

11. Building Select Queries using QBE - Specifying Criteria
Pearson Education © 2009

12. Creating Multi-table Queries
Pearson Education © 2009

13. Calculating Totals
Pearson Education © 2009

14. Calculating Totals
Pearson Education © 2009

15. Using Advanced Queries - Parameter Query
Pearson Education © 2009

16. Using Advanced Queries - Crosstab Query
Pearson Education © 2009

17. Using Advanced Queries - Crosstab Query
Pearson Education © 2009

18. Using Advanced Queries - Find Matched Query
Pearson Education © 2009

19. Using Advanced Queries - Find Unmatched Query
Pearson Education © 2009

20. Using Advanced Queries - Autolookup Query
Pearson Education © 2009

21. Changing Content of Tables - Make-Table Action Query
Pearson Education © 2009

22. Changing Content of Tables - Delete Action Query
Pearson Education © 2009

23. Changing Content of Tables - Update Action Query
Pearson Education © 2009

24. Changing Content of Tables - Append Action Query
Pearson Education © 2009

25. Changing Content of Tables - Append Action Query
Pearson Education © 2009