Defining composite primary keys

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Contents 1 Introduction 2 Part 1 3 See also 4 External links

[edit] Introduction

Some times you need to define a primary key that is a combination of two fields. This is called a primary composite key.

[edit] Part 1

To define a composite Primary key,

1. open up the Table Designer,
2. right click on the first field and select "Primary key",
3. right click on the second field and click on "Composite Primary key".

You should now see two key images next to the two fields which indicates that they form a composite primary key.

[edit] See also

• Tips
• Tutorials

[edit] External links