MYSQL替换时间(年月日)字段时分秒不变实例解析
写法1:
updatesas_order_supply_month_payset RECEIVE_TIME=REPLACE(RECEIVE_TIME,DATE_FORMAT(RECEIVE_TIME,'%Y-%m-%d'),(selectPERIOD_ENDfromsas_task_supply_month_pay_periodwherebelong='1729' andCREATE_TIMElike'%2017-07-12%'))whereORDER_CODE='PO201707130115';
写法2:
updatesas_order_supply_month_payset RECEIVE_TIME=ADDTIME((selectPERIOD_ENDfromsas_task_supply_month_pay_periodwherebelong='1729' andCREATE_TIMElike'%2017-07-12%')+interval0hour,time(RECEIVE_TIME))whereORDER_CODE='PO201707130115';
写法3:
updatesas_order_supply_month_payset RECEIVE_TIME=concat((selectPERIOD_ENDfromsas_task_supply_month_pay_periodwherebelong='1729' andCREATE_TIMElike'%2017-07-12%'),'',DATE_FORMAT(RECEIVE_TIME,'%H:%i:%S'))whereORDER_CODE='PO201707130115';
说明:s
as_order_supply_month_pay表的RECEIVE_TIME字段格式为"2017-06-1612:13:16",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"2017-07-1212:13:16"。
错误写法:
updatesas_order_supply_month_payset RECEIVE_TIME=DATE_FORMAT(concat((selectPERIOD_ENDfromsas_task_supply_month_pay_periodwherebelong='1729' andCREATE_TIMElike'%2017-07-12%'),'',(selectDATE_FORMAT(RECEIVE_TIME,'%H:%i:%S')fromsas_order_supply_month_pay whereORDER_CODE='PO201707130115')),"yyyy-MM-dd%H:%i:%S")whereORDER_CODE='PO201707130115';
错误写法报错:
[Err]1093-Youcan'tspecifytargettable'sas_order_supply_month_pay'forupdateinFROMclause
错误分析:
错误语句:
(selectDATE_FORMAT(RECEIVE_TIME,'%H:%i:%S')fromsas_order_supply_month_paywhereORDER_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毛票票网站的支持!