{ { { UNTIL TIME | FROM TIME } [=] 'date_string'
| { TIME BETWEEN 'date_string' AND
| FROM TIME [=] 'date_string' UNTIL TIME [=]
}
'date_string'
| UNTIL SCN [=] integer
| SCN BETWEEN integer AND integer
| FROM SCN [=] integer [UNTIL SCN [=] integer]
}
[THREAD [=] integer]
| { UNTIL SEQUENCE [=] integer
| FROM SEQUENCE [=] integer [UNTIL SEQUENCE [=] integer]
| SEQUENCE [BETWEEN integer AND] integer
}
[THREAD [=] integer]
}