A. SET @Cjb_Cur = CURSOR FOR SELECT * FROM CJB
B. CREATE @CURSOR Cjb_Cur AS SELECT * FROM CJB
C. DECLARE @Cjb_Cur AS TABLE CJB
D. DECLARE @Cjb_Cur CURSOR FOR SELECT * FROM CJB
對(duì)于下面語句:
執(zhí)行后,@sum的值為()
A. 5
B. 0
C. 10
D. 1