sql 去除重复值的问题

UPDATE aaron a,

  (SELECT

     SUBSTRING_INDEX(NAME,sname,-2)    ssname

   FROM (SELECT *

         FROM aaron AS a,

           (SELECT

              CONCAT(SUBSTRING_INDEX(NAME,'||',1),'||') AS sname

            FROM aaron) AS aa) AS aaa) aaaa

SET a.name = aaaa.ssname





去除c10-1.jpg||/c10-1.jpg||/c10-2.jpg||

变为/c10-1.jpg||/c10-2.jpg||

  

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