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Difference between primary key and unique key ?

Question Posted / kundn

Answer Posted / kundn

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 ?    14 Yes 17 No



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