DELETE FROM PS_TL_GRP_FLD_SEC_BKP TL WHERE NOT EXISTS
(SELECT 1 FROM PSRECFIELDALL_BKP PT WHERE PT.RECNAME = TL.RECNAME AND PT.FIELDNAME=TL.FIELDNAME)
When parsing/executing this query am getting an error near TL however if delete is replaced with SELECT the same query works fine.
Thou I doubt the issue could be with the using of aliasing in a delete query Im not sure if we can write it that way.
Please check and let me know.