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GeekInterview.com > Interview Questions > Oracle > SQL Plus
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Question: What is the basic difference between primary key and (unique key along with Not NULL).
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| April 04, 2007 15:21:23 |
#3 |
| ggk.krishna |
Member Since: February 2007 Total Comments: 7 |
RE: What is the basic difference between primary key a...
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Hi Anil,
Apart from NOTNULL, I can tell you one more difference.
We can define Primary key on only one column in a table.
But for Unique key there is no limit. we can define as many columns as we want. |
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