CREATETRIGGERdbo.trGroups ONgroups AFTERINSERT,UPDATE,DELETE AS --This trigger submits a cached rates delete job for modified groups. --It also updates the groups' last modified columns for modified groups. --It also updates the groups' state (if currently unspecified) based on --the (first...
AFTERINSERT,UPDATE--定义都个触发,可以用逗号隔开 AS BEGIN SET NOCOUNT ON --可有可无 DECLARE @.. ;--声明变量 select insert ... --相应的select语句,insert语句(update语句、delete语句) SET NOCOUNT OFF--可有可无 END GO 4 INSTEAD OF类的语法 CREATE TRIGGERtf_name ONtable INSTEAD OFINSERT--在...
INSERT INTO users (username, email, password) VALUES ('john_doe', 'john.doe@example.com', 'secure_password'); 查看触发器 要查看数据库中的触发器,可以使用SHOW TRIGGERS语句。例如,要查看当前数据库中的所有触发器,可以使用以下SQL语句: SHOW TRIGGERS; 修改触发器 要修改触发器的定义,可以使用DROP TR...
create table trigger_a_order_2 like trigger_a_order_1; 1. insert 触发器 DELIMITER $ create trigger trigger_a_order_1_trigger after insert on trigger_a_order_1 for each row begin INSERT INTO trigger_a_order_2(order_id,order_sn,user_nick,user_mobile,address,status,payment) VALUES(new.or...
AFTER INSERT, UPDATE, DELETE AS -- This trigger submits a cached rates delete job for modified groups. -- It also updates the groups' last modified columns for modified groups. -- It also updates the groups' state (if currently unspecified) based on ...
插入触发器(INSERT trigger):在数据插入表中之前或之后触发。 更新触发器(UPDATE trigger):在数据更新表中之前或之后触发。 删除触发器(DELETE trigger):在数据删除表中之前或之后触发。 按触发粒度分类: 行级触发器(FOR EACH ROW trigger):针对每一行数据的变更操作触发。
CREATE TRIGGER trgAfterOrderInsert ON Orders AFTER INSERT AS BEGIN -- 假设Orders表有OrderId, ProductId, Quantity等列 -- Inventory表有ProductId, Quantity等列 -- 声明变量以存储影响的行数 DECLARE @RowsAffected INT; -- 尝试更新库存 UPDATE Inventory SET Quantity = Quantity - I.Quantity FROM Invento...
CREATE TRIGGER 触发器名称 {BEFORE | AFTER} {INSERT | UPDATE | DELETE} ON 表名 FOR EACH ROW 触发器执行的语句块; 举个例子🌰 假设你想在向test_trigger表插入数据后,自动在test_trigger_log表中插入一条日志信息。你可以这样创建触发器: DELIMITER // CREATE TRIGGER after_insert AFTER INSERT ON test...
table2, t_table3的值，并且启用事务，保证一致性，请参考：CREATE TRIGGER mytriggerAFTER UPDATE ON ...
更新操作(Update):Inserted表有数据(新数据),Deleted表有数据(旧数据) 笔者用到的案例: create TRIGGER [risk].[Entry_Head_port_Exchange_Trigger] ON [RiskH800].[risk].[ENTRY_HEAD] AFTER INSERT,UPDATE AS DECLARE @COUNT INT DECLARE @MANUAL_NO_COUNT INT ...