A.Define the column MAINID as NOT UPDATABLE
B.Define the column MAINID as a PRIMARY KEY
C.Define the column MAINID as a FOREIGN KEY
D.Define an UPDATE trigger on table TABLEX
参考答案：D
ADefinethecolumnMAINIDasNOTUPDATABLEBDefinethecolu
本文来自网络，不代表煤炭资讯立场。转载请注明出处： http://www.mtxh.cn/bk/wd-bk/408955.html
