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identity_column

Identity Column

Identity columns are nice way to let the system generate unique ids for each inserted row in a table.

By default the system doesn't let you insert a value into an identity column but you can override this.

See Inserting values into an identity column.

OVERRIDING USER VALUE

If you want to the use the system generated values you can specify this on the SQL statement with OVERRIDE USER VALUE.

  INSERT INTO ORDERS OVERRIDING USER VALUE
      (SELECT * FROM TODAYS_ORDER)

OVERRIDING SYSTEM VALUE

If you want to the use the user provided values you can specify this on the SQL statement with OVERRIDE SYSTEM VALUE.

  INSERT INTO ORDERS OVERRIDING SYSTEM VALUE
      (SELECT * FROM TODAYS_ORDER)
identity_column.txt · Last modified: 2018/10/15 10:52 by mihael