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Difference between primary key and unique key ?
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Answer Posted / vitthal parkar
Unique key Primary key
1. Can have null value 1. Can not have null value
2.Table can have multiple 2. Table Can have multiple unique
Unique keys keys
3Single column at a time 3. May be combination of one or
or more columns
| Is This Answer Correct ? | 35 Yes | 58 No |
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