MySQL join inner-join on-clause cross-join
NOW-Function UCASE-Function scalar-functions FORMAT-Function MID-Function LEN-Function ROUND-Function LCASE-Function
operators logical-operators
Oracle NULL-values General-Functions NVL
sub-queries correlated-subquery synchronized-subquery
join cross-join inner-join
constraints CHECK-constraint
FROM-clause optimization
NULL-values
WHERE-clause DELETE-statement
