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Database is an Microsoft app where you can add loads of information to. 

 

You can do loads within it like:

 

• Quires

• Record

• Form

• Calculations

• Sorts

• Macros

• Relationships between tables

 

There is many other things I haven't learnt that you can do.

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In Access you have primary and foreign keys

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A peimary key uniquely identifies a row and there can only be on primary key in each table. 

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A foreign key  is a column or group of columns in a relational database table that provides a link between data in two table. Normally the link is between the primary key. 

 

Database can be a little hard you just need to get your head around it.