Anonymous
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Cars &Transportation
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2 weeks ago
How many primary keys can a table?
Contents
- How many primary keys can a table have?
- Can a table have 3 primary keys?
- Can a table have all primary keys?
How many primary keys can a table have?
Each table can only have one primary key. Access can automatically create a primary key field for you when you create a table, or you can specify the fields that you want to use as the 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.
Can a table have all primary keys?
Every table can have (but does not have to have) a primary key. The column or columns defined as the primary key ensure uniqueness in the table; no two rows can have the same key. The primary key of one table may also help to identify records in other tables, and be part of the second table's primary key.
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