Minor fixes.

@item

Full operator and function support in the @code{SELECT} and @code{WHERE}

parts of queries.  For example:

@example

mysql> SELECT CONCAT(first_name, " ", last_name) FROM tbl_name

           WHERE income/dependents > 10000 AND age > 30;

@end example

@item

Full support for SQL @code{GROUP BY} and @code{ORDER BY} clauses.  Support 

for group functions (@code{COUNT()}, @code{COUNT(DISTINCT ...)},