CREATE TRIGGER tri_1 ON sc AFTER INSERT,UPDATE AS IF EXISTS( SELECT * FROM INSERTED WHERE grade NOT BETWEEN 0 AND 100 ) BEGIN ROLLBACK PRINT '成绩必须在0-100范围内' END 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 限制student表学生所在系的取值必须在{计算机系,信息系,物理系,数学系}...
在查询分析器中使用drop trigger 触发器名称来删除触发器。 也可以同时删除多个触发器:drop trigger 触发器名称,触发器名称... 注意:触发器名称是不加引号的。在删除触发器之前可以先看一下触发器是否存在: if Exists(select name from sysobjects where name=触发器名称 and xtype='TR') 2.用企业管理器删除 ...
使用create trigger命令创建DML触发器的语法形式如下: create trigger[schema_name.]trigger_name on {table|view} [with [encryption] execute as Clause][,...n]] {for|after|instead of} {[insert][,] [update] [,] [delete]} [with append] [not for replication] as {sql_statement [;][...n]...
CREATE TRIGGER trigger_name ON { table | view } [ WITH ENCRYPTION ] --用于加密触发器 { { { FOR | AFTER | INSTEAD OF } { [ INSERT ] [ , ] [ UPDATE ] } --激活触发器的三种操作,可以同时执行,也可选其一 [ WITH APPEND ] [ NOT FOR REPLICATION ] AS [ { IF UPDATE ( column ) [...
createtable#tableName 1. 如何使用 SQL Server 触发器 触发器2_初始化环境SQL --- 初始化环境 --- createdatabaseTriggerDatabase use TriggerDatabase go if exists(select*fromsysobjectswherename='bank') droptablebank createtablebank-- 账户信息表 ( userName...
CREATETABLEIFNOTEXISTS完结账目(账户编码INT,数额DECIMAL(8,2))// 接着建立触发器: CREATETRIGGER删除账目BEFOREDELETEON账目FOREACHROWBEGININSERTINTO完结账目(账户编码,数额)VALUES(OLD.账户编码,OLD.数额);END// 最后来试验一下触发器是否运行得当,我们从账目中删除编号为97的行: ...
问错误: SQL命令中不存在列“exist”EN我试图了解一下触发器，我想做一个触发器，检查我是否在我的...
CREATE TRIGGER 运行完成后,event_group还将充当宏,将它涉及的事件类型添加到 sys.trigger_events 目录视图中。 NOT FOR REPLICATION 适用于:SQL Server 2008 (10.0.x) 及更高版本。 指明触发器不得在复制代理修改触发器涉及的表时运行。 sql_statement
(below average).CREATETRIGGERPurchasing.LowCreditONPurchasing.PurchaseOrderHeaderAFTERINSERTASIF(ROWCOUNT_BIG() =0)RETURN; IF EXISTS (SELECT1FROMinsertedASiJOINPurchasing.VendorASvONv.BusinessEntityID = i.VendorIDWHEREv.CreditRating =5)BEGINRAISERROR ('A vendor''s credit rating is too low to ...
(below average).CREATETRIGGERPurchasing.LowCreditONPurchasing.PurchaseOrderHeaderAFTERINSERTASIF(ROWCOUNT_BIG() =0)RETURN; IF EXISTS (SELECT1FROMinsertedASiJOINPurchasing.VendorASvONv.BusinessEntityID = i.VendorIDWHEREv.CreditRating =5)BEGINRAISERROR ('A vendor''s credit rating is too low to ...