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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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| July 07, 2008 03:13:20 |
#10 |
| mohanban |
Member Since: July 2008 Total Comments: 1 |
RE: What is the basic difference between primary key and (unique key along with Not NULL).
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| In addition to all this,unique key along with Not NULL constraint has got a name i.e. "candidate key".So a table having a column which is unique as well as not null apart from primar key is known as a candidate key.Thanks... |
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