IN A TABLE CAN WE USE PRIMARY KEY IN ONE COLUMN AND IN
ANOTHER COLUMN BOTH UNIQUE AND NOT NULL CONSTRAINS.IF YES
HOW?PLZ GIVE ME A EXAMPLE.
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Answer / oceanblue
Yes, you can have a column for Primary key and have another
column which will have no duplicates or null.
e.g.
A Salary Table will have employee ID as primary key. The
table also contains TAX-ID which can not be null or duplicate.
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