Cannot create the clustered index "%.*ls" on view "%.*ls" because the select list of the view definition does not include all columns in the GROUP BY clause. Consider adding these columns to the select list.
Msg 8660, Level 16, State 0, Line 2
Cannot create the clustered index “%.*ls” on view “%.*ls” because the select list of the view definition does not include all columns in the GROUP BY clause. Consider adding these columns to the select list.
This error message appears when you try to create a clustered index on a view, but not all columns in the GROUP BY clause are also contained in the SELECT list.
The T-SQL statement can be parsed, but causes the error at runtime.
Error of the Severity level 16 are generated by the user and can be fixed by the SQL Server user. The statement cannot be run this way. All columns in the GROUP BY list must also be contained in the SELECT list.
This error message was introduced with SQL Server 2000.
SET NUMERIC_ROUNDABORT OFF;
IF OBJECT_ID (‘dbo.v’, ‘View’) IS NOT NULL
DROP VIEW dbo.v;
IF OBJECT_ID(‘dbo.t’) IS NOT NULL
DROP TABLE dbo.t;
CREATE TABLE dbo.t
c1 int NOT NULL
CREATE VIEW dbo.v
SUM(T.c1) AS c1, COUNT_BIG(*) AS MyCount
CREATE UNIQUE CLUSTERED INDEX cix_v
ON dbo.v (c1);
In the above example we try to create an index on a view. Since the column c1 of the base table is contained in the GROUP BY list but not in the SELECT list, the error is raised.