What is an Integrity Constrains ?

An integrity constraint is a declarative way to define a business rule for a column of a table.

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simakas

  • Oct 5th, 2007
 

Special requirements for table data:
1) allow NULL value
2) uniqueness of value
3) primary key
4) foreign key
5) special value size/text/length etc requirements

All information is stored in Data Dictionary.

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