Web Reference: Jan 12, 2026 · Learn why SQL Server throws the invalid length error in functions like LEFT, SUBSTRING, and RIGHT, and discover practical fixes to prevent it. I would like to display the column B in my below SQL, but when I add it to the query it gives me the following error: Column T2.B' is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause. Jan 16, 2026 · The "Invalid column name" error (error number 207) in SQL Server occurs when the query processor cannot find a specified column in the target table or view. At first glance, this seems straightforward— the column doesn’t exist.
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