difference between primary key and foreign key
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heya frnd
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A primary key is a column or a set of columns that uniquely identify a row in a table. ... Usually a foriegn key is in a table that is different from the table whose primary key it is required to match. A table can have multiple foriegn key. The primary key cannot accept null values.
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here is ur answer
A primary key is a column or a set of columns that uniquely identify a row in a table. ... Usually a foriegn key is in a table that is different from the table whose primary key it is required to match. A table can have multiple foriegn key. The primary key cannot accept null values.
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