SQL server 字段合并CAST(org_no AS VARCHAR(20))+CAST(page_no AS VARCHAR(20))+CAST(djlb_no AS VARCHAR(20)))

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；