SQL中OBJECT_ID，OBJECT_NAME，OBJECT_DEFINITION的用法

标签:OBJECT_ID,OBJECT_NAME,OBJECT_DEFINITION

在SQL SERVER中数据库中的对象(表,存储过程,函数,视图等)在系统表中保存都用objectid做标识的.执行下面的SQL就明白了:

SELECT * FROM sys.objects

与对象相关最常用的三个函数:

OBJECT_ID:此方法返回数据库对象标识号。类型为int，表示该对象在系统中的编号。

OBJECT_NAME:根据对象ID得到对象名

OBJECT_DEFINITION:返回对象的源文件.

示例1:

--新建一个存储过程
create PROCEDURE [dbo].[usp_TestProcedure]
AS
BEGIN
PRINT 'this is a procedure '
END

DECLARE @ObjectID INT
DECLARE @ObjectName varchar(20)
DECLARE @ObjectDefine varchar(max)
SET @ObjectID = OBJECT_ID('usp_TestProcedure')
set @ObjectName = OBJECT_NAME(@ObjectID)
SET @ObjectDefine = OBJECT_DEFINITION(@ObjectID)

select @ObjectID,@ObjectName,@ObjectDefine

其中@ObjectName为:usp_TestProcedure.

@ObjectDefine:

create PROCEDURE [dbo].[usp_TestProcedure]
AS
BEGIN
PRINT 'this is a procedure '
END

示例2:

a.表不存在时新建表:

IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[cs_Threads]') AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[cs_Threads](
[ThreadID] [int] IDENTITY(1,1) NOT NULL,
[SectionID] [int] NOT NULL,
[UserID] [int] NOT NULL,
[PostAuthor] [nvarchar](64) NULL CONSTRAINT [DF_cs_Threads_PostAuthor] DEFAULT (''),
[PostDate] [datetime] NOT NULL,
[ThreadDate] [datetime] NOT NULL,
[LastViewedDate] [datetime] NOT NULL CONSTRAINT [DF_cs_Threads_LastViewedDate] DEFAULT (getdate()),
[StickyDate] [datetime] NOT NULL,
[TotalViews] [int] NOT NULL CONSTRAINT [DF_cs_Threads_TotalViews] DEFAULT ((0)),
[TotalReplies] [int] NOT NULL CONSTRAINT [DF_cs_Threads_TotalReplies] DEFAULT ((0)),
[MostRecentPostAuthorID] [int] NOT NULL,
[MostRecentPostAuthor] [nvarchar](64) NULL CONSTRAINT [DF_cs_Threads_MostRecentPostAuthor] DEFAULT (''),
[MostRecentPostID] [int] NOT NULL,
[IsLocked] [bit] NOT NULL,
[IsSticky] [bit] NOT NULL,
[IsApproved] [bit] NOT NULL CONSTRAINT [DF_cs_Threads_IsApproved] DEFAULT ((1)),
[RatingSum] [int] NOT NULL CONSTRAINT [DF_cs_Threads_RatingSum] DEFAULT ((0)),
[TotalRatings] [int] NOT NULL CONSTRAINT [DF_cs_Threads_TotalRating] DEFAULT ((0)),
[ThreadEmoticonID] [int] NOT NULL CONSTRAINT [DF_cs_Threads_ThreadEmoticon] DEFAULT ((0)),
[ThreadStatus] [int] NOT NULL CONSTRAINT [DF_cs_Threads_ThreadStatus] DEFAULT ((0)),
[SettingsID] [int] NULL,
CONSTRAINT [PK_cs_Threads] PRIMARY KEY CLUSTERED
(
[ThreadID] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO

b.存储过程不存在时,新建存储过程

IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[cs_PostCategories_Get_ByName]') AND type in (N'P', N'PC'))
BEGIN
EXEC dbo.sp_executesql @statement = N'
CREATE PROCEDURE [dbo].[cs_PostCategories_Get_ByName]
@Name nvarchar(256),
@SectionQuerySQL ntext,
@SettingsID int
AS
SET Transaction Isolation Level Read UNCOMMITTED
CREATE TABLE #Sections
(
SectionID int
)
INSERT INTO #Sections (SectionID)
EXEC (@SectionQuerySQL)
SELECT
C.CategoryID, C.SectionID, C.Name, C.IsEnabled, C.ParentID, C.Path, C.Description, C.SettingsID,
C.TotalThreads, C.MostRecentPostDate, C.TotalSubThreads, C.MostRecentSubPostDate, C.DateCreated, C.FeaturedPostID
FROM cs_Post_Categories C
WHERE C.SectionID in (select SectionID from #Sections)
and C.SettingsID = @SettingsID
and C.[Name] = @Name
'
END

c.索引不存在时,新建索引

IF NOT EXISTS (SELECT * FROM sys.indexes WHERE object_id = OBJECT_ID(N'[dbo].[cs_Threads]') AND name = N'IX_cs_Threads')
CREATE NONCLUSTERED INDEX [IX_cs_Threads] ON [dbo].[cs_Threads]
(
[SectionID] ASC,
[ThreadID] DESC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
GO

SQL中OBJECT_ID，OBJECT_NAME，OBJECT_DEFINITION的用法相关推荐

SQL中object_id函数的用法
SQL中object_id函数的用法收藏 int object_id('objectname'); 此方法返回数据库对象标识号. 其中,参数objectname 表示要使用的对象,其数据类型为nc ...
sql中group by 和having 用法解析
--sql中的group by 用法解析: -- Group By语句从英文的字面意义上理解就是"根据(by)一定的规则进行分组(Group)". --它的作用是通过一定的规则将一 ...
关于SQL中Union和Join的用法
转载请注明出处:帘卷西风的专栏(http://blog.csdn.net/ljxfblog) 一直以来,对于数据库SQL方面都是半吊子水平,能写一些基本的增删改查的语句,大部分时间都是用下Where, ...
sql中exists,not exists的用法
exists : 强调的是是否返回结果集,不要求知道返回什么, 比如: select name from student where sex = 'm' and mark exists(selec ...
SQL中DATEADD和DATEDIFF的用法
通常,你需要获得当前日期和计算一些其他的日期,例如,你的程序可能需要判断一个月的第一天或者最后一天.你们大部分人大概都知道怎样把日期进行分割(年.月.日等),然后仅仅用分割出来的年.月.日等放在几个函 ...
sql中having、group by用法及常用聚合函数
having是用在聚合函数的用法.当我们在用聚合函数的时候,一般都要用到GROUP BY 先进行分组,然后再进行聚合函数的运算.运算完后就要用到HAVING 的用法了,就是进行判断了. 注意:sele ...
SQL 中 TRIM（）函数用法
问题描述: 在数据库中,批量导入数据的时候,没有注意字段数据的空格,造成导入数据库里的数据末尾有空格. 解决方案: trim() 函数介绍: trim 函数可以移除字符串的首尾信息.最常见的用法为移除 ...
SQL中的CONVERT函数的用法
定义和用法 CONVERT() 函数是把日期转换为新数据类型的通用函数. CONVERT() 函数可以用不同的格式显示日期/时间数据. 语法 CONVERT(data_type(length),dat ...
sql中insert的几种用法
在做项目中数据库是使用很频繁的,其中插入语句是最频繁不过的,近日写了一些存储过程,又将inset 语句看了遍. 一般格式: insert into 表名 (column1,column2,column ...

SQL中OBJECT_ID，OBJECT_NAME，OBJECT_DEFINITION的用法

SQL中OBJECT_ID，OBJECT_NAME，OBJECT_DEFINITION的用法

示例1:

示例2:

SQL中OBJECT_ID，OBJECT_NAME，OBJECT_DEFINITION的用法相关推荐

最新文章

热门文章