NEW.columnName (columnName为相应数据表某一列名) 使用例子 create trigger trigger_test3 after insert on user for each row insert into user_logs values(NULL,now(),concat('有新用户添加,信息为:',NEW.uid,NEW.username,NEW.password)); -- 测试 insert into user values(4,'赵六','123456'); 1...
下面是一个使用触发器循环执行UPDATE语句的示例: DELIMITER//CREATETRIGGERupdate_triggerAFTERINSERTONtable_nameFOR EACH ROWBEGINUPDATEtable_nameSETcolumn1=value1,column2=value2,...WHEREcondition;END//DELIMITER; 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 以上代码中,update_trigger是触发器的名...
问mysql trigger when update或insert - update字段在受影响的行/行中EN有的时候会需要写一段insert的s...
DELIMITER $CREATETRIGGERuser_logAFTERINSERT ONusersFOR EACH ROWBEGINDECLAREs1VARCHAR(40)character set utf8;DECLAREs2VARCHAR(20)character set utf8;#后面发现中文字符编码出现乱码,这里设置字符集SETs2= " is created";SETs1=CONCAT(NEW.name_lick,s2); #函数CONCAT可以将字符串连接INSERT INTOlogs(log_lick)...
> I want to insert a record into the row_change table > for each field that changed in the trigger field: You mean the requirement is to insert a row_change row for every `field` column where the NEW column value differs from the OLD? That'll require a block like ... ...
CREATE TRIGGER after_update_trigger AFTER UPDATE ON your_table FOR EACH ROW BEGIN -- 使用NEW关键字引用最近更新的行的新值 DECLARE updated_column_value VARCHAR(255); SET updated_column_value = NEW.column_name; -- 进行相应的处理操作 -- ... ...
MySQL 8.4 Reference Manual / ... / The sys_config_update_set_user Trigger 30.4.2.3 The sys_config_update_set_user Trigger The sys_config_update_set_user trigger for the sys_config table is similar to the sys_config_insert_set_user trigger, but for UPDATE statements. ...
Additional Column With BULK INSERT Adventureworks query about sales AFTER INSERT and AFTER UPDATE triggers on same table After INSERT Trigger question - how to use value from last added record Age Bucket in sql Age calculation in report builder query Aggregated CASE expressions versus the PIVOT oper...
You cannot change a table while the INSERT trigger is firing. The INSERT might do some locking which could result in a deadlock. Also, updating the table from a trigger would then cause the same trigger to fire again in an infinite recursive loop. Both of these reasons are why MySQL prev...
Re: INSERT INTO on AFTER UPDATE trigger 617 JK Heydt June 26, 2020 02:46PM Re: INSERT INTO on AFTER UPDATE trigger 752 JK Heydt June 26, 2020 02:49PM Re: INSERT INTO on AFTER UPDATE trigger 584 JK Heydt June 26, 2020 02:54PM Sorry...