mysql批量修改

原文链接： https://blog.csdn.net/justry_deng/article/details/83064354

UPDATE `xuer_info`
   SET userlevel = ( CASE id
                       WHEN 1 THEN '低级'
                       WHEN 2 THEN '中级'
                       WHEN 3 THEN '高级'
                       WHEN 4 THEN '特级'
                       WHEN 5 THEN 'laji'
                       ELSE '无级'
                     END ),
       username = ( CASE id
                      WHEN 1 THEN '邓'
                      WHEN 2 THEN '沙'
                      WHEN 3 THEN '利'
                      WHEN 4 THEN '文'
                      WHEN 5 THEN '亨'
                      ELSE username
                    END ),
       usertype = ( CASE id
                      WHEN 1 THEN 'A1'
                      WHEN 2 THEN 'A2'
                      WHEN 3 THEN 'A3'
                      WHEN 4 THEN 'A4'
                      WHEN 5 THEN 'A5'
                      ELSE usertype
                    END )
 WHERE id > 0