select * from zwfw_region t where (select count(1) from zwfw_region where uniquecoding=t.regioncode and regioncode=t.uniquecoding) and LENGTH(uniquecoding) =6
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select * from zwfw_region t where (select count(1) from zwfw_region where uniquecoding=t.regioncode and regioncode=t.uniquecoding) and LENGTH(uniquecoding) =6
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