How about = instead of 'AS'

create view dbo.GlobaldataEOLT2

as

select [NUMCAM]

,[C_Fourn]

,[date_passage]

,[heure_passage]

,[banc]

,[NUMPale]

,[Module_Status]

,[Code_defaut]

,[Total_TestTime]

,[Purgerunin_TestTime]

,[ShifterPosHyst_TestTime]

,[ShifterActRespTime_TestTime]

,[GearActStroke_TestTime]

,[GearActRespTime_TestTime]

,[LeakageON_TestTime]

,[K1K2Leakage_TestTime]

,[QPVK1DeliveryTest_TestTime]

,[PPVK2PressureTest_TestTime]

,[LeakageOFF_TestTime]

,[PRVTest_TestTime]

,[OPS_NRV_Test_TestTime]

,[version_prog]

,[Jourprod] =

CASE WHEN heure_passage BETWEEN '00:00:00' and '05:59:59' THEN day(jour_passage) -2

ELSE day([date_passage]) -1

END

FROM dbo.T_EOLT_BRUTE_FLOAT

or

CASE WHEN heure_passage BETWEEN '00:00:00' and '05:59:59' THEN day(jour_passage) -2

ELSE day([date_passage]) -1

END as [Jourprod]