题目内容
(请给出正确答案)
[单选题]
Which command is used to add attributes or constraints to an existing relation?
A.alter table
B.drop table
C.create table
D.update table
提问人:网友shengsheng
发布时间:2022-01-07
A.alter table
B.drop table
C.create table
D.update table
A、
B、
C、
D、No overshoot
A、addition
B、subtract
C、multiply
D、divide
A、select
B、from
C、where
D、rename
A、GRANT UPDATE(balance) ON account TO Zhang ;
B、GRANT UPDATE balance OF account TO Zhang ;
C、REVOKE UPDATE(balance) ON account TO Zhang ;
D、REVOKE UPDATE balance OF account FROM Zhang ;
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