( 3.21).
. 3.21.
( 3.22) 1. queries .
. 3.22.
, , . , 1 ( 3.23).
. 3.23.
. , . QBE, .
- . , , .
( ) . " " .
"" "". , - "5/A" "" . , 5/A (. 3.24).
. 3.24.
1, , - , " ". query " ", (. 3.25).
. 3.25.
query query . query , , , [ ]. , .
. - , " query". query, . , (. 3.26).
. 3.26.
, (. 3.27).
. 3.27.
. Access 2007 .