SQL列数据转换为字符串

DECLARE @center_JZHW VARCHAR(500)
SET @center_JZHW = ( SELECT DISTINCT STUFF(
    ( SELECT  ‘,‘ + ce_code FROM ap_center WITH ( NOLOCK )
      WHERE   CE_PROVINCE = ‘浙江省‘ ORDER BY ce_code
      FOR XML PATH(‘‘)), 1, 1, ‘‘) AS jzhw
    FROM   ap_center t)
SELECT @center_JZHW

DECLARE @ret VARCHAR(200)
        SET @ret = ‘‘
        SELECT  @ret = @ret + ‘|‘ + RTRIM(RT_GSX_COMPTIA_CODE)
        FROM    dbo.AP_REQUEST_RETURN_PART
        WHERE   rt_so_no = @so_no
        SET @ret = CASE WHEN LEN(@ret) > 0 THEN STUFF(@ret, 1, 1, ‘‘)
                        ELSE @ret
                   END
        RETURN @ret 

SELECT DISTINCT STUFF(
    ( SELECT  ‘,‘ + rt_loan_part FROM dbo.AP_REQUEST_RETURN_PART WHERE rt_so_no=‘IPTH14060001‘
      FOR XML PATH(‘‘)), 1, 1, ‘‘) AS part
    ,STUFF(
    ( SELECT  ‘,‘ + RT_GSX_COMPTIA_CODE FROM dbo.AP_REQUEST_RETURN_PART WHERE rt_so_no=‘IPTH14060001‘
      FOR XML PATH(‘‘)), 1, 1, ‘‘) AS COMPTIA_CODE 
    FROM   AP_REQUEST_RETURN_PART t