Question

Composite key is a combination of___________ columns.​

Answer 1

Answer:

2 or more than 2 columns

Explanation:

because in composite number it's products having 2 or more than 2 values

Answer 2

The composite key is a group of 2 or more columns that distinguish the rows uniquely.

Explanation:

• There is a limitation to the number of columns you may have in a composite key. In SQL Server 2016 and newer, the limitation is 32 columns and previous to that a primary key ought to have as much as 16 columns.
• A composite key in SQL may be described as a mixture of multiple columns, and those columns are used to identify all of the rows which are concerned uniquely.
• Even though a single column cannot pick out any row uniquely, a mixture of over one column can uniquely pick out any record.
• The combination of  2 or more columns that uniquely pick out rows in a table is the composite key.