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Results tagged with foreign-key
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user 225459
A type of integrity constraint used in a RDBMS platform to ensure that a value in a column matches one of a range of key values from another table.
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Is it necessary for a foreign key to be a primary key in another table? Why?
I am new to database implementation. I want to know if it is necessary for a foreign key to be primary key of another table.
Foreign key is not unique - it may have duplicate entries. If it must be pr …
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