[sql] 代码如下: create table wlbtest1( username varchar2(2), deptID number ); create table wlbtest2( deptName varchar2(10), deptID number ); insert into wlbtest1 values (‘a’, 1); insert into wlbtest1 values (‘b’, 1); insert into wlbtest1 values (‘c’, 1); insert into wlbtest1 values (‘d’, 2); insert int