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Primary Key vs Unique Key
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Primary key and unique key are entity integrity constraints. The main difference between the two keys is that there can be multiple unique key columns with null values, whereas that there can only be... |










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i like
shubham shrivastav
Mon, 06/30/2014 - 15:02
Good clarify. ....
amardeep
Thu, 06/05/2014 - 15:23
The difference are good
riya
Thu, 06/05/2014 - 09:23
The basic differences are vry good nd vry easy...............
Lipika
Thu, 05/22/2014 - 08:12
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