Формат
<query specification> ::=
(SELECT [ALL | DISTINCT] <select list>
<table expression>)
<select list> ::=
<value expression> [{,<value expression>}]
| *
<query specification> ::=
(SELECT [ALL | DISTINCT] <select list>
<table expression>)
<select list> ::=
<value expression> [{,<value expression>}]
| *