Do Primary Key Values And Alternate Key Values Have To Be Unique?

1.	Do Primary Key Values And Alternate Key Values Have To Be Unique?
Answer» PRIMARY KEY values must be UNIQUE and alternate key values need not be unique. Primary key values must be unique and alternate key values need not be unique.

Answer»

PRIMARY KEY values must be UNIQUE and alternate key values need not be unique.

Primary key values must be unique and alternate key values need not be unique.

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