标签:no data work flow update 同表 查询 WHERE event
[root@db01 /data/backup]# mysql.dba zhouwanchun [root@localhost:mysql3306.sock] [zhouwanchun]> UPDATE work_flow_event SET process_status = '3', process_message = '审批拒绝' WHERE flow_no IN ( SELECT flow_no FROM work_flow_event WHERE flow_no IN ( SELECT flow_no FROM work_flow WHERE flow_data -> '$.customerNumber' = '101379' AND flow_key LIKE 'price%' AND flow_data -> '$.endTime' < '2021-05-11' AND curr_node = '02' ) AND node_code = '02' ); ERROR 1093 (HY000): You can't specify target table 'work_flow_event' for update in FROM clause
[root@localhost:mysql3306.sock] [zhouwanchun]> UPDATE work_flow_event SET process_status = '3', process_message = '审批拒绝' WHERE flow_no IN (select * from ( SELECT flow_no FROM work_flow_event as a WHERE a.flow_no IN ( SELECT b.flow_no FROM work_flow as b WHERE b.flow_data -> '$.customerNumber' = '101379' AND b.flow_key LIKE 'price%' AND b.flow_data -> '$.endTime' < '2021-05-11' AND b.curr_node = '02' ) AND a.node_code = '02' )); ERROR 1248 (42000): Every derived table must have its own alias
[root@localhost:mysql.sock] [zhouwanchun]> UPDATE work_flow_event SET process_status = '3', process_message = '审批拒绝' WHERE flow_no IN (select * from ( SELECT flow_no FROM work_flow_event as a WHERE a.flow_no IN ( SELECT b.flow_no FROM work_flow as b WHERE b.flow_data -> '$.customerNumber' = '101379' AND b.flow_key LIKE 'price%' AND b.flow_data -> '$.endTime' < '2021-05-11' AND b.curr_node = '02' ) AND a.node_code = '02' ) as b); Query OK, 0 rows affected (0.72 sec) Rows matched: 3644 Changed: 0 Warnings: 0
-- 总结
派生表要加表别名。 原始表不能出现在 where 后面第一层的子查询当中。 在同一语句中,不能先 select 出同一表中的某些值,再 update 这个表。 同表不支持 update 子查询的结果,将子查询结果,再 select 一次,这样就规避了错误。标签:no,data,work,flow,update,同表,查询,WHERE,event 来源: https://www.cnblogs.com/zhouwanchun/p/16554168.html
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