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可以用SQL实现一样的功效,就是麻烦了点。
drop table t1; drop table t2; create table t1(id int primary key,nickname varchar(20),playNum varchar(20)); create table t2(id int primary key,nickname varchar(20),playNum varchar(20)); insert into t1 values(1,1,10); insert into t1 values(2,2,20); insert into t1 values(3,3,30); insert into t2 values(1,1,10); insert into t2 values(2,2,200); insert into t2 values(3,33,300); commit; dr