写法1:
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update sas_order_supply_month_pay set RECEIVE_TIME= REPLACE (RECEIVE_TIME,DATE_FORMAT(RECEIVE_TIME, '%Y-%m-%d' ),( select PERIOD_END from sas_task_supply_month_pay_period where belong= '1729' and CREATE_TIME like '%2017-07-12%' )) where ORDER_CODE= 'PO201707130115' ; |
写法2:
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update sas_order_supply_month_pay set RECEIVE_TIME= ADDTIME (( select PERIOD_END from sas_task_supply_month_pay_period where belong= '1729' and CREATE_TIME like '%2017-07-12%' )+interval 0 hour , time (RECEIVE_TIME)) where ORDER_CODE= 'PO201707130115' ; |
写法3:
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update sas_order_supply_month_pay set RECEIVE_TIME = concat(( select PERIOD_END from sas_task_supply_month_pay_period where belong= '1729' and CREATE_TIME like '%2017-07-12%' ), ' ' ,DATE_FORMAT(RECEIVE_TIME, '%H:%i:%S' )) where ORDER_CODE= 'PO201707130115' ; |
说明: s
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as_order_supply_month_pay表的RECEIVE_TIME字段格式为 "2017-06-16 12:13:16" ,sas_task_supply_month_pay_period表的PERIOD_END字段格式为 "2017-07-12" , |
执行后RECEIVE_TIME
修改为"2017-07-12 12:13:16"
。
错误写法:
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update sas_order_supply_month_pay set RECEIVE_TIME = DATE_FORMAT(concat(( select PERIOD_END from sas_task_supply_month_pay_period where belong= '1729' and CREATE_TIME like '%2017-07-12%' ), ' ' ,( select DATE_FORMAT(RECEIVE_TIME, '%H:%i:%S' ) from sas_order_supply_month_pay where ORDER_CODE= 'PO201707130115' )), "yyyy-MM-dd %H:%i:%S" ) where ORDER_CODE= 'PO201707130115' ; |
错误写法报错:
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[Err] 1093 - You can 't specify target table ' sas_order_supply_month_pay' for update in FROM clause |
错误分析:
错误语句:
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( select DATE_FORMAT(RECEIVE_TIME, '%H:%i:%S' ) from sas_order_supply_month_pay where ORDER_CODE= 'PO201707130115' ) |
此语句单独执行是可以的,但是合在一起执行报错,猜测:修改表和子查询不能是同一个表?
以上所述是小编给大家介绍的MYSQL替换时间(年月日)字段时分秒不变的实现方法,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持!
原文链接:http://www.cnblogs.com/againn/archive/2017/07/14/7168987.html