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SAP Sybase SQL Anywhere 16.0 » SQL Anywhere Server - SQL Usage » Data integrity » Entity and referential integrity


Primary keys enforce entity integrity

Once you specify the primary key for each table, maintaining entity integrity requires no further action by either client application developers or by the database administrator.

The table owner defines the primary key for a table when they create it. If they modify the structure of a table at a later date, they can also redefine the primary key.

 See also