sql 分组，然后用逗号分隔

Posted 2021-05-14

  INSERT INTO Service2
  (
  	ServiceName,
  	SourceId
  )
  SELECT ServiceName,
         SourceId                  = STUFF(
             (
                 SELECT ',' + SourceId
                 FROM   (
                            SELECT DISTINCT ServiceName,
                                   SourceId
                            FROM   [Service]
                        ) t
                 WHERE  ServiceName     = s.ServiceName FOR XML PATH('')
             ),
             1,
             1,
             ''
         )
  FROM   (
             SELECT DISTINCT ServiceName,
                    SourceId
             FROM   [Service]
         ) s
  GROUP BY
         ServiceName