Entrypoint lastdaylastmonth compatible with UTF-8
Input TIMESTAMP date optionally time Output TIMESTAMP date of last day of last month as date with time 00:00:00
TestSQL SELECT '30.04.2009' AS ISCORRECT, F_LASTDAYLASTMONTH('08.05.2009 15:00:00') FROM RDB$DATABASE; SELECT '31.12.2008' AS ISCORRECT, F_LASTDAYLASTMONTH('03.01.2009 15:00:00') FROM RDB$DATABASE;