select HTTYPE, t1.Factory, t1.H_user as 财务1,t2.H_user as 财务2,t3.H_user as 财务3 , t4.H_user as 财务4select HTTYPE, t1.Factory, t1.H_user as 财务1,t2
阅读背景：
数据库自联表查询
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