查看表MARKS结构,哪个SQL语句能执行成功()
A: SELEC
B: student_name,subject1.FRO
C: marks.WHERE-subject1>AVG(subject1)
D: SELEC
E: student_name,SUM(subject1)FRO
F: marks.WHERE-student_name-LIKE’R%’
G: SELEC
H: SUM(subject1+subject2+subject3)FRO
I: marks.WHERE-student_name-ISNULL
J: SELEC
K: SUM(DISTINC
L: NVL(subject1,0)),MAX(subject1)FRO
M: mark.sWHERE-subject1>subject2
A: SELEC
B: student_name,subject1.FRO
C: marks.WHERE-subject1>AVG(subject1)
D: SELEC
E: student_name,SUM(subject1)FRO
F: marks.WHERE-student_name-LIKE’R%’
G: SELEC
H: SUM(subject1+subject2+subject3)FRO
I: marks.WHERE-student_name-ISNULL
J: SELEC
K: SUM(DISTINC
L: NVL(subject1,0)),MAX(subject1)FRO
M: mark.sWHERE-subject1>subject2
举一反三
- 查看表INVOICE的结果,哪两个SQL语句能执行成功() A: SELEC B: AVG(inv_date)FRO C: invoice D: SELEC E: MAX(inv_date),MIN(cust_id)FRO F: invoice G: SELEC H: MAX(AVG(SYSDATE-inv_date))FRO I: invoice J: SELEC K: AVG(inv_date-SYSDATE),AVG(inv_amt)FRO L: invoice
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- To examine 1 thing thoroughly, and then start the other. A: alternating (point-by-point) B: block (subject -by subject)
- All changes in the contract_______the confirmation by both parties. A: are subject to B: is subject to C: subject to D: subject