Below query where given to Sysdate is between two TimeStamp
to_char(AF_AN_S, 'DDMMYYYY HH24:MI'), AF_EET, trim(FT_NAME) as AVT_NAME, AC_REG, FLB_PAX, FLB_INF, P_NAME,
P_VNAME, CLG_ACD_CODE, P_LTR_CODE, P_PERS_NR, P_NR
from IBSDBA.MV_ACT_FLIGHT,IBSDBA.MV_AIRCRAFT,
IBSDBA.MV_FL_TYP,
IBSDBA.MV_FLT_ART,
IBSDBA.MV_FLT_BLNG,IBSDBA.MV_VP_FLIGHT_ASSIGN,
IBSDBA.MV_CREW_LOG, IBSDBA.MV_PERSONAL
where P_OWNER = 'TUI'
and CLG_P_PERS_NR = P_PERS_NR
and VAS_SEQ = CLG_VAS_SEQ
and VAS_AF_ID = AF_ID
and AF_AB_S between TO_TIMESTAMP ('05.04.2012:03:00:00','DD.MM.YYYY:HH24:MI:SS')
and TO_TIMESTAMP ('05.04.2012:17:00:00','DD.MM.YYYY:HH24:MI:SS')
to_char(AF_AN_S, 'DDMMYYYY HH24:MI'), AF_EET, trim(FT_NAME) as AVT_NAME, AC_REG, FLB_PAX, FLB_INF, P_NAME,
P_VNAME, CLG_ACD_CODE, P_LTR_CODE, P_PERS_NR, P_NR
from IBSDBA.MV_ACT_FLIGHT,IBSDBA.MV_AIRCRAFT,
IBSDBA.MV_FL_TYP,
IBSDBA.MV_FLT_ART,
IBSDBA.MV_FLT_BLNG,IBSDBA.MV_VP_FLIGHT_ASSIGN,
IBSDBA.MV_CREW_LOG, IBSDBA.MV_PERSONAL
where P_OWNER = 'TUI'
and CLG_P_PERS_NR = P_PERS_NR
and VAS_SEQ = CLG_VAS_SEQ
and VAS_AF_ID = AF_ID
and AF_AB_S between TO_TIMESTAMP ('05.04.2012:03:00:00','DD.MM.YYYY:HH24:MI:SS')
and TO_TIMESTAMP ('05.04.2012:17:00:00','DD.MM.YYYY:HH24:MI:SS')