Старт транзакции
SET TRANSACTION [READ WRITE | READ ONLY]
[WAIT | NO WAIT]
[[ ISOLATION LEVEL] {SNAPSHOT [TABLE STABILITY]
I READ COMMITTED [[NO] RECORD_VERSION]}]
[RESERVING < список_таблиц > [FOR [SHARED | PROTECTED] [READ
WRITE] ], [< список таблиц > . .. ];
