what is a primary key?
hello guys I'm back online!❤ any my followers here?
Answers
Answered by
1
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).
Answered by
1
Answer:
The column (field) in a relation database that uniquely identifies the roe in the table.
Similar questions