Column names in each table must be unique. Column name ‘%.*ls’ in table ‘%.*ls’ is specified more than once.

Error Message:
Msg 2705, Level 16, State 3, Line 1
Column names in each table must be unique. Column name ‘%.*ls’ in table ‘%.*ls’ is specified more than once.

Severity level:
16.

Description:
This error message appears when you try to specify a name for a column more than once upon creation of a table.

Consequences:
The T-SQL statement can be parsed, but causes the error at runtime.

Resolution:
Error 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. Columns names within a table must be unique.

Versions:
All versions of SQL Server

Example(s):
USE tempdb;
GO
IF OBJECT_ID(‘tempdb..#t’) > 0
 DROP TABLE #t
GO
CREATE TABLE #t
(
 id INT
 CONSTRAINT PK_t PRIMARY KEY,
 id INT
)

Remarks:
In the above example we try to use the name ID for more than one column in the same table. This raises the error.




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