Data Modeling Design

Databases with Access by Moira Stephen

By Moira Stephen

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Fields that will be sorted or queried should be indexed. g. Town or Surname field. Indexed (No Duplicates) ensures that each record has a unique value in the field – useful for primary key fields. Create a new table, and enter the following table structure Field name Data type Properties MemberID Title First name/Initial Surname Address Town Postcode Region Tel no Email Child member AutoNumber Text Text Text Text Text Text Text Text Text Yes/No Primary key Field size = 6 Field size = 20 Field size = 25, Indexed (Duplicates OK) Field size = 30 Field size = 20, Indexed (Duplicates OK), Default value = Edinburgh Field size = 10, Default value = EH Field size = 20, Indexed (Duplicates OK), Default value = Lothian Field size = 20, Default value = “0131” Field size = 25 5 32 Save your table as ‘Members’ and close it.

8 Close the DVD Store database file. Personnel database You have been given the task of setting up a Personnel database to record details of the staff who work for your company and the course bookings that are made on company training courses. Set up the structure for the database following the guidelines below. 1 Create a new database – call it ‘Personnel’. g. “0131” so Access accepts it as a text rather than a number. If Access thinks it is a number, it will drop the leading 0. 33 3 Save your table as ‘Staff’ and close it.

36 1 From the Database window, click the Relationships tool . or 2 Choose Relationships from the Tools menu. The Relationships window and the Show Table dialog box are displayed. Take note You should close all tables and return to the Database window before you open the Relationships window. Showing tables Basic steps 1 If necessary, click the Show Table tool in the Relationships window to display the Show Table dialog box. 2 3 4 5 Select the tables to add to the Relationships window – to add several at once, click on the first, hold down [Ctrl] and click on the others.

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