Системы обработки информации - язык баз данных SQL

       

Формат


<declare cursor> ::=

DECLARE <cursor name> CURSOR

FOR <cursor specification>

<cursor specification> ::=

<query expression> [<order by clause>...]

<query expression> ::=

<query term>

| <query expression> UNION [ALL] <query term>

<query term> ::=

<query specification> | (<query expression>)

<order by clause> ::=

ORDER BY <sort specification>

[{,<sort specification>}...]

<sort specification> ::=

{ <unsigned integer> | <column specification> }

[ASC | DESC]



Содержание раздела