答案是:
(1) Update p set weight=weight+5 where color=’红’ (2) delete from j where jno not in (select jno from spj) (3)select jname from j where not exists (select * from spj where spj.jno=j.jno and sno in (select sno from s where city=
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本题添加时间:2023/4/3 12:59:00