3.explain the use of primary key in a table

1.	3.explain the use of primary key in a table
Answer» Answer: The PRIMARY KEY constraint uniquely identifies each record in a table. Primary keys must contain UNIQUE values, and cannot contain NULL values. A table can have only ONE primary key; and in the table, this primary key can CONSIST of single or MULTIPLE columns (FIELDS). Explanation: hope this helps uh

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Answer:

The PRIMARY KEY constraint uniquely identifies each record in a table. Primary keys must contain UNIQUE values, and cannot contain NULL values. A table can have only ONE primary key; and in the table, this primary key can CONSIST of single or MULTIPLE columns (FIELDS).

Explanation:

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3.explain the use of primary key in a table ​

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3.explain the use of primary key in a table