How many primary keys can be there for a base table?

Question

A table can have only one primary key, which may consist of single or multiple fields. When multiple fields are used as a primary key, they are called a composite key. If a table has a primary key defined on any field(s), then you cannot have two records having the same value of that field(s).

How many primary key A table can have in a table?

A table's primary key should be explicitly defined in the CREATE TABLE statement. Tables can only have one primary key.

Can a table have 3 primary keys?

A table can only ever have a one primary key. It is not possible to create a table with two different primary keys. You can create a table with two different unique indexes (which are much like a primary key) but only one primary key can exist.

Expert · Answer

A table's primary key should be explicitly defined in the CREATE TABLE statement. Tables can only have one primary key.

Expert · Answer

A table can only ever have a one primary key. It is not possible to create a table with two different primary keys. You can create a table with two different unique indexes (which are much like a primary key) but only one primary key can exist.

How many primary keys can be there for a base table?

How many primary key A table can have in a table?

Can a table have 3 primary keys?

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