9.1.7.2. Using COLLATE in SQL Statements

With the COLLATE clause, you can override whatever the default collation is for a comparison. COLLATE may be used in various parts of SQL statements. Here are some examples:

  • With ORDER BY:

    SELECT k
    FROM t1
    ORDER BY k COLLATE latin1_german2_ci;
    
  • With AS:

    SELECT k COLLATE latin1_german2_ci AS k1
    FROM t1
    ORDER BY k1;
    
  • With GROUP BY:

    SELECT k
    FROM t1
    GROUP BY k COLLATE latin1_german2_ci;
    
  • With aggregate functions:

    SELECT MAX(k COLLATE latin1_german2_ci)
    FROM t1;
    
  • With DISTINCT:

    SELECT DISTINCT k COLLATE latin1_german2_ci
    FROM t1;
    
  • With WHERE:

         SELECT *
         FROM t1
         WHERE _latin1 'Müller' COLLATE latin1_german2_ci = k;
    
         SELECT *
         FROM t1
         WHERE k LIKE _latin1 'Müller' COLLATE latin1_german2_ci;
    
  • With HAVING:

    SELECT k
    FROM t1
    GROUP BY k
    HAVING k = _latin1 'Müller' COLLATE latin1_german2_ci;
    
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