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select t1.deptno, t1.yj 一月份, t2.yj 二月份, t3.yj 三月份
from
(select y2.deptno,y1.yj from
(select yj, deptno from yj01 where month='一月份') y1 right join yjdept y2 on y1.deptno=y2.deptno)t1
join
(select y2.deptno,y1.yj from
(select yj, deptno from yj01 where month='二月份') y1 right join yjdept y2 on y1.deptno=y2.deptno)t2
on t1.deptno=t2.deptno
join
(select y2.deptno,y1.yj from
(select yj, deptno from yj01 where month='三月份') y1 right join yjdept y2 on y1.deptno=y2.deptno)t3
on t1.deptno=t3.deptno
order by t1.deptno;
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