sqlserver 字符串多行合并为一行

SELECT S_OS_PO.recId,S_OS_PO.os_PO_Number as 外协单号,S_JOB.partnum as 生产编号,        P_MO.moNumber as 制造单号, CASE WHEN T_SubcontractType.unitId=3 then S_OS_POItem.qty_PNL else S_OS_POItem.qty end as 外协数量  

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