SQL SERVER – Cannot resolve collation conflict for equal to operation

Cannot resolve collation conflict for equal to operation.

In MS SQL SERVER, the collation can be set at the column level. When compared 2 different collation column in the query, this error comes up.

SELECT ID
FROM ItemsTable
INNER JOIN AccountsTable
WHERE ItemsTable.Collation1Col = AccountsTable.Collation2Col

If columns ItemsTable.Collation1Col and AccountsTable.Collation2Col have different collation, it will generate the error “Cannot resolve collation conflict for equal to operation“.

To resolve the collation conflict add following keywords around “=” operator.

SELECT ID
FROM ItemsTable
INNER JOIN AccountsTable
WHERE ItemsTable.Collation1Col COLLATE DATABASE_DEFAULT
= AccountsTable.Collation2Col COLLATE DATABASE_DEFAULT

Watch this quick video for resolution:

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