NULL-values constraints NOT-NULL-constraint
HAVING-clause GROUP-BY-clause aggregate-functions
ROWNUM Oracle
sub-queries correlated-subquery synchronized-subquery
sub-queries
General-Functions COALESCE IF-ELSEIF-ENDIF
collation binary-collation character-sets case-insensitive-collation
UPDATE-clause
join inner-join
inner-join cross-join on-clause join MySQL