Convertir le champ datetime en un simple champ de date en SQL (Oracle)

Utilisez simplement la fonction TRUNC.

SELECT DISTINCT
TRUNC(C.RECEIPTDATE),
(I.CLIENTID ||' - '||PO.CLIENTNAME) AS CLIENT,
D.INVOICEID,
TRUNC(D.SVCFROMDATE),
TRUNC(D.SVCTODATE),
D.SVCCODE
FROM M_EQP_ORDERS
WHERE.....