select BM,XH,ZBNR,ZBFZ,YXBJ, BZ from ( SELECT BM,XH,ZBNR,ZBFZ,YXBJ, BZ FROM A表 union all select BM,XH,ZBNR,ZBFZ,YXBJ,case when BZ='20211216' then '202201' else null end BZ FROM A表 where BZ='20211216' union all select BM,XH,ZBNR,ZBFZ,YXBJ,case when BZ='20211216' then '202202' else null end BZ FROM A表
where BZ='20211216')
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