Fixed problem with LEFT JOIN and
            COUNT() on a column which was declared
            NULL + and it had a
            DEFAULT value.
          
            Fixed core dump problem when using
            CONCAT() in a WHERE
            clause.
          
            Fixed problem with AVG() and
            STD() with NULL
            values.
          
This is a translation of the MySQL Reference Manual that can be found at dev.mysql.com. The original Reference Manual is in English, and this translation is not necessarily as up to date as the English version.

