A.死鎖出現(xiàn)了,必須殺掉某個(gè)會(huì)話(huà)才能解開(kāi)
B.死鎖能夠被ORACLE偵測(cè)到,并且自動(dòng)解開(kāi)
C.應(yīng)用軟件設(shè)計(jì)應(yīng)充分考慮避免死鎖
D.出現(xiàn)死鎖后會(huì)報(bào)ORA-60
A.MAX
B.SUM
C.COUNT
D.AVG
A.UNION
B.MINUS
C.UNIONALL
D.INTERSECT