Error Message:
Msg 4421, Level 16, State 1, Line 1
Derived table ‘%.*ls’ is not updatable because a column of the derived table is derived or constant.
Severity level:
16.
Description:
This error message appears when you try to update a column of a derived table that is either derived or constant.
Consequences:
The T-SQL statement can be parsed, but causes the error at runtime.
Resolution:
Errors of the Severity Level 16 are generated by the user and can be fixed by the SQL Server user. The statement cannot be executed this way. You cannot update a derived or constant column of a derived table.
Versions:
All versions of SQL Server.
Example(s):
UPDATE t
SET
c1 = 2
FROM
(SELECT
1 AS c1) t
Remarks:
In the above example we try to update the column c1 of the derived table t. Because c1 is a constant, the error is raised.