1. Mark Dixon Page 1 02 – Queries: Query by Example

2. Mark Dixon Page 2 Questions: Databases Consider the following table: a) How many records does it contain? b) How many fields does it contain? 9 6

3. Mark Dixon Page 3 Session Aims & Objectives Aims –Introduce you to queries Objectives, by end of this week’s sessions, you should be able to: –create a query using 'query by example' to: extract a subset of records and fields from a database table

4. Mark Dixon Page 4 Creating Queries: New Query Select the database window Select queries option Double click on Create Query in Design view

5. Mark Dixon Page 5 Creating Queries: Add Table Click Add button Click Close button

6. Mark Dixon Page 6 Creating Queries: Add Fields Drag field names into query

7. Mark Dixon Page 7 View you Query Click View button

8. Mark Dixon Page 8 Return to Query Design Click View button again

9. Mark Dixon Page 9 Modify your Query Type in criteria

10. Mark Dixon Page 10 Criteria Massive variety – very powerful: > greater than < less than = equal to >= greater than or equal to <= less than or equal to <> not equal to Like "*or*" * means any text (i.e. contains "or")

11. Mark Dixon Page 11 Tutorial Exercise 1: Plants database LEARNING OBJECTIVE: to understand table, field, and record, so that you can create your own database with a single table containing several fields and records using MS Access TASK: Create the plants database (shown in earlier slide).

12. Mark Dixon Page 12 Tutorial Exercise 2: Plants database LEARNING OBJECTIVE: to understand queries, so that you can create your own query that displays selected fields and records from a table using MS Access TASK 1: Create the query (shown in earlier slide). TASK 2: Experiment with Show, Sort and Criteria combinations