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Answer Posted / shashi kishor prasad
In a Table there can have as many as 1024 colums but not
more than that is allowed. There can be only 1 primary key
in a table However you can combine multiple keys together to
act like a primary key that is called composite key.
Composite key is also a primary key, difference is that it
is a combination of no of colums that act as candidate key.
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