数据库去重汇总 count(distinct xxx) 与distinct ； count（case when ）

总括： SELECT  T.dept_one as "部门", COUNT(DISTINCT (   CASE     WHEN (is_week='1') THEN     name   ELSE    NULL   end )) as "周活"    .net FROM   (SELECT m.*, s.event_property_code,s.event_property_value FR

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