SQL Server error “Implicit conversion of because the collation of the value is unresolved due to a collation conflict.”

Question

I getting this error while developing stored procedure

Implicit conversion of varchar value to varchar cannot be performed because the collation of th

Answer 1

ALTER TABLE DEPT1 and DEPT2 so that resulting definitions of tables do not contain any COLLATE

Answer 2

You'd need COLLATE in both places most likely.

Select City COLLATE DATABASE_DEFAULT AS Place, State, Country FROM DEPT1
UNION ALL
Select '' COLLATE DATABASE_DEFAULT AS Place, 'Arizona' As State, Country FROM DEPT2

Edit: You may need it on every string if you get it in one places

Select
    City COLLATE DATABASE_DEFAULT AS Place,
    State COLLATE DATABASE_DEFAULT AS State,
    Country COLLATE DATABASE_DEFAULT AS Country
FROM DEPT1
UNION ALL
Select
    '' COLLATE DATABASE_DEFAULT,
    'Arizona' COLLATE DATABASE_DEFAULT ,
    Country COLLATE DATABASE_DEFAULT
FROM DEPT2

Edit2:

It happens because your column collation is probably different to your database collation. So "City" has one collation but string constants have another.