在插入到另一个表时更新MySQL表是指在将数据插入一个表时,同时更新另一个表中的相关数据。这通常通过使用MySQL的触发器(Trigger)来实现。 触发器是MySQL数据库中的一种特殊对象,它可以...
Re: Trigger To Update Another Table 2590 tarique Tuku July 23, 2008 11:15PM Re: Trigger To Update Another Table 2460 Max Hugen July 23, 2008 11:52PM Sorry, you can't reply to this topic. It has been closed. Content reproduced on this site is the property of the respective copyright...
CREATE PROCEDURE, ALTER PROCEDURE, DROP PROCEDURE, CREATE FUNCTION, DROP FUNCTION, CREATE TRIGGER, DROP TRIGGER. 不过你可以使用 1. 2. 3. 4. 5. 6. 7. 8. CREATE PROCEDURE db5.p1 () DROP DATABASE db5// 但是类似 "USE database" 1. 2. 3. 4. 语句也是非法的,因为MySQL假定默认数据库就...
DELIMITER//CREATETRIGGERdaily_updateAFTERINSERTONtable_nameFOR EACH ROWBEGINIFNEW.date_column=CURDATE()THENINSERTINTOanother_table(column1,column2)VALUES(NEW.column1,NEW.column2);ENDIF;END//DELIMITER; 1. 2. 3. 4. 5. 6. 7. 8. 9.
表锁,是对整个表进行锁定,如果是虚拟的视图(view)、触发器(trigger),则会将其关联的所有表进行锁定 行锁,实际锁的对象不是行,而是按索引锁定,也就是说锁不会定位到某条记录,而是通过限制索引来间接作用到记录 08 "锁"和事务 SQL通用标准定义了事务的ACID四大属性,即原子性Atomcity,一致性Consistency,隔离性Isol...
OK, let's talk about the code. Using the CREATE TRIGGER statement, we've initiated the trigger, naming it 'sales_bi_trg'. MySQL triggers can fire before or after an INSERT, UPDATE or DELETE event. This one fires before any data is inserted in the 'sales' table. ...
UPDATE 是 SQL 中用于修改数据库表中现有记录的重要命令。 语法 UPDATE table_name SET column1 = value1, column2 = value2, ... WHERE condition; table_name:要更新的表的名称。 SET:指定需要修改的列及其新值。 WHERE:条件语句,用于指定哪些记录需要被更新。如果省略 WHERE 子句,表中的所有...
Before MySQL 5.7.2, there cannot be multiple triggers for a given table that have the same trigger event and action time. For example, you cannot have twoBEFORE UPDATEtriggers for a table. To work around this, you can define a trigger that executes multiple statements by using theBEGIN ....
create table t1 -> ( -> id int not null, -> name char(30) not null, -> unique index Uniqldx(id) -> ); Query OK, 0 rows affected (0.05 sec) 单列索引:实在数据表中某个字段上创建的索引 创建 create table t2 -> ( -> id int not null, ...
1. for Insert, i would like to do something like this: after the insert, take the inserted record and insert it into another table. this is what i came up with: CREATE TRIGGER testing AFTER INSERT ON table1 FOR EACH ROW BEGIN