存储过程
触发器现有字典表（Dict）
字段
说明
Id
标示
ItemKey
键
ItemValue
值
UpperId
上层标示
需求一：当新增一条记录的时候，若已存在相同键的，拒绝插入//操作步骤：展开相关表，右击‘触发器’，新建即可
[flash=500,400]http://s1.knowsky.com/20160211/yt345x1z1p432.gif[/flash]
USE [sqlffwj]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TRIGGER [dbo].[CheckKeyRepeated]
ON [dbo].[Dict]
for INSERT
AS
if(select COUNT(*) from [Dict], inserted inobj where [Dict].ItemKey = inobj.ItemKey and [Dict].Id != inobj.Id) > 0
BEGIN
raiserror('已有相同键，不能插入',16,1)
rollback tran
END
[flash=500,400]http://s1.knowsky.com/20160211/yt345x1z1p432.gif[/flash]
需求二：当删除一条记录的时候，若有下层记录，拒绝删除[flash=500,400]http://s1.knowsky.com/20160211/yt345x1z1p432.gif[/flash]
USE [sqlffwj]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TRIGGER [dbo].[CheckDependence]
ON [dbo].[Dict]
for delete
AS
if(select COUNT(*) from [Dict], deleted delbj where [Dict].UpperId = delbj.Id) > 0
BEGIN
raiserror('有下层记录，不能删除',16,1)
rollback tran
END
[flash=500,400]http://s1.knowsky.com/20160211/yt345x1z1p432.gif[/flash]
需求三：当删除一条记录的时候，若有下层记录，下层也一起删除[flash=500,400]http://s1.knowsky.com/20160211/yt345x1z1p432.gif[/flash]
USE [sqlffwj]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TRIGGER [dbo].[CheckDependence2]
ON [dbo].[Dict]
AFTER delete
AS
while(select COUNT(*) from [Dict] where UpperId != 0 and UpperId not in (select Id from [Dict])) > 0
BEGIN
delete from [Dict]
where UpperId != 0 and UpperId not in (select Id from [Dict])
END
[flash=500,400]http://s1.knowsky.com/20160211/yt345x1z1p432.gif[/flash]
存储过程 现有用户表（User）
字段
说明
Id
标示
Name
姓名
Age
年龄
DeptId
部门标示
部门表（Dept）
字段
说明
Id
标示
Name
名称
需求一：用存储过程查询所有用户的信息（标示、姓名、年龄、部门名） //操作步骤：展开数据库，再展开可编程性，右击‘存储过程’，新建即可
[flash=500,400]http://s1.knowsky.com/20160211/yt345x1z1p432.gif[/flash]
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATEPROCEDURE [dbo].[GetUsers]
AS
BEGIN
select [User].Id '标示',[User].Name '姓名', [User].Age '年龄', [Dept].Name '部门' from [User] left join [Dept] on [User].DeptId = [Dept].Id
END
GO
[flash=500,400]http://s1.knowsky.com/20160211/yt345x1z1p432.gif[/flash]
/* 调用 */
exec GetUsers
需求二：用存储过程查询指定部门的用户信息（标示、姓名、年龄、部门名）[flash=500,400]http://s1.knowsky.com/20160211/yt345x1z1p432.gif[/flash]
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE PROCEDURE [dbo].[GetUsersByDept]
(
@deptid int /* 部门标示 */
)
AS
BEGIN
select [User].Id '标示',[User].Name '姓名', [User].Age '年龄', [Dept].Name '部门'
from [User] left join [Dept] on [User].DeptId = [Dept].Id
where [Dept].Id = @deptid
END
GO
[flash=500,400]http://s1.knowsky.com/20160211/yt345x1z1p432.gif[/flash]
/* 调用 */
exec GetUsersByDept 2
需求三：在项目中用ADO调用存储过程'GetUsersByDept'1、环境：VS2010+sql2008
2、新建edmx文件，引用两张表和存储过程
[flash=500,400]http://s1.knowsky.com/20160211/towjgskv0t532.jpg[/flash]
3、切换到‘模型浏览器’，‘添加函数导入’
[flash=500,400]http://s1.knowsky.com/20160211/bbjcr0kbkvu32.jpg[/flash]
4、在‘添加函数导入’面板，点击‘获取列信息’，获取到列信息后再点击‘创建新的复杂类型’，确定后就可以通过Func调用存储过程了
[flash=500,400]http://s1.knowsky.com/20160211/knnsdc21lvm33.jpg[/flash]
5、调用代码Demo
using (var context = new SqltestEntities())
{
var result = context.GetUsersByDept(2);
throw new Exception(result.Count().ToString());
}