CREATE TRIGGER newproduct AFTER INSERT ON products FOR EACH ROW SELECT 'Product added'; CREATE TRIGGER--创建一个叫newproduct的新触发器 AFTER INSERT--此触发器将在INSERT语句成功后执行 FOR EACH ROW--代码对每个插入行执行 1. 2. 3. 4. 5.
CREATE TRIGGER order_before_insert BEFORE INSERT ON ordersFOR EACH ROW BEGINSET NEW.create_time = NOW();END; 完整触发器包含5个基本要素:1. 触发器名称(order_before_insert)2. 触发时机(BEFORE/AFTER)3. 触发事件(INSERT/UPDATE/DELETE)4. 关联表(orders)5. 触发逻辑(通过BEGIN...END包裹的SQL语句)...
CREATE TRIGGER trigger_name trigger_time trigger_event ON tbl_name FOR EACH ROW trigger_stmt; trigger_time是触发程序的动作时间。它可以是BEFORE或AFTER trigger_event指明了激活触发程序的语句的类型。 trigger_event可以是下述值之一: · INSERT:将新行插入表时激活触发程序,例如,通过INSERT、LOAD DATA和REPLAC...
AFTER INSERT,AFTER DELETE,AFTER UPDATE 其中,触发器名参数指要创建的触发器的名字 BEFORE和AFTER参数指定了触发执行的时间,在事件之前或是之后 FOR EACH ROW表示任何一条记录上的操作满足触发事件都会触发该触发器 创建有多个执行语句的触发器: 1 2 3 4 5 CREATE TRIGGER 触发器名 BEFORE|AFTER 触发事件 ON 表...
首先,触发器叫TRIGGER。基本结构如下: CREATEorREPLACETRIGGER名字 时间(after|before) 动作(INSERT|UPDATE|DELETE) on表A for each row begin sql语句,表B; end; 2.插入操作(insert) 首先创建数据表,默认两张表是同一个结构,下面还有不同结构的。
以下是MariaDB中create trigger的语法:MySQL不支持or replace和if not exists子句。 CREATE [OR REPLACE] TRIGGER [IF NOT EXISTS] trigger_name { BEFORE | AFTER } { INSERT | UPDATE | DELETE } ON tbl_name FOR EACH ROW trigger_body 触发器只能建立在永久表上,不能建立在视图和临时表上。MySQL/Maria...
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
将INSERT改为DELETE，NEW改为OLDCREATE TRIGGER TG_A_DELETE AFTER DELETE ON a FOR EACH ROWBEGININSERT INTO B(id)VALUES(OLD.id);ENDUPDATE触发器CREATE TRIGGER TG_A_UPDATE AFTER UPDATE ON a FOR EACH ROWBEGININSERT INTO B(id)VALUES(OLD.id);ENDcreate trigger A_Ins_Delon Afor ...
13.1.20 CREATE TRIGGER Statement CREATE [DEFINER = user] TRIGGER trigger_name trigger_time trigger_event ON tbl_name FOR EACH ROW [trigger_order] trigger_body trigger_time: { BEFORE | AFTER } trigger_event: { INSERT | UPDATE | DELETE } trigger_order: { FOLLOWS | PRECEDES } other_trigger...
create trigger 触发器名 before|after 触发事件 on 表名 for each row 执行语句 多条执行语句: delimiter $$ create trigger 触发器名 defore|after 触发事件 on 表名 for each row begin 执行语句 end $$ 多个触发器时的执行顺序: before触发器、表操作(insert、update、delete)、after触发器 触发器的查看...