Error Message:
Msg 1757, Level 16, State 0, Line 4
Column ‘%.*ls.%.*ls’ is not of same collation as referencing column ‘%.*ls.%.*ls’ in foreign key ‘%.*ls’.
Severity level:
16.
Description:
This error message appears when you try to define a foreign key constraing on columns having different collations.
Consequences:
The T-SQL statement can be parsed, but causes the error at runtime.
Resolution:
Errors of the Severity Level 15 are generated by the user and can be fixed by the SQL Server user. The statement cannot be executed this way. Columns in a foreign key constraint must be of the same collation.
Versions:
All versions of SQL Server.
Example(s):
IF OBJECT_ID (‘dbo.T1’) IS NOT NULL
DROP TABLE dbo.T1;
GO
IF OBJECT_ID (‘dbo.T2’) IS NOT NULL
DROP TABLE dbo.T2;
GO
CREATE TABLE dbo.T1 (c2 varchar(20) COLLATE Albanian_BIN NOT NULL PRIMARY KEY);
CREATE TABLE dbo.T2 (c2 varchar(20) COLLATE SQL_Scandinavian_CP850_CI_AS
CONSTRAINT FK_T2_T1 FOREIGN KEY REFERENCES dbo.T1 (c2)
);
Remarks:
In the above example we try to define a foreign key constraint on columns having a different collation. This raises the error.
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