sql server 字段合并(CAST)
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select (CAST(org_no AS VARCHAR(20)) CAST(page_no AS VARCHAR(20)) CAST(djlb_no AS VARCHAR(20))) from ERP_BASIC_BILLNO_PREFIX where org_num=#{orgNum} and page_name=#{pageName} and djlb_name=#{djlbName};")
字段1+字段2
oracle 字段合并(CONCAT)
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select (Concat(Concat(CODE,‘_‘),NAME)) 合并结果集 from GoodsCate
mysql 字段合并(CONCAT)
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SELECT declare_type_id,support_model,project_name,CONCAT(declare_type_id,support_model,project_name) from gf_index;