Sqlserver: 使用临时表和表变量

USE [SqlserverDBName]
GO

/***********************************************************
*DataServer: XXX.XXX.XXX.XXX
*DataBase:  SqlserverDBName
*Name:      UP_YourSqlserverDBName
*Function:  UP_YourSqlserverDBName test
*Input:	 
*Output:	
*Creator: greatwqs
*Updated: 2012-08-21 temp table test
***********************************************************/
CREATE PROCEDURE [dbo].[UP_TEST_TEMP_TABLE]
(	
     @param1 varchar(MAX),
     @param2 varchar(2)
)
AS
BEGIN
     SET NOCOUNT ON
     -- 不显示执行后的控制台信息
     
     -- Create Temp Table 'TAB_XXXXXXXXXXXX'
     IF OBJECT_ID(N'tempdb.dbo.#TAB_XXXXXXXXXXXX', N'U') IS NOT NULL
     BEGIN
          DROP TABLE #TAB_XXXXXXXXXXXX
          -- use temp table not reference dbo.tabxxxx, del dbo
     END
       
     CREATE TABLE #TAB_XXXXXXXXXXXX(
          [TransID] [int] IDENTITY(1,1) NOT NULL,
          ItemName   char(25) NOT NULL,
          CONSTRAINT [PK_TAB_XXXXXXXXXXXX] PRIMARY KEY CLUSTERED 
          (
               [TransID] ASC
          ) ON [PRIMARY]
     )ON [PRIMARY]  
     
     -- INSERT DATA TO TEMP TABLE
     WHILE(@param1 = 'ABCDEFG')  
     BEGIN
          INSERT INTO #TAB_XXXXXXXXXXXX(ItemName)   
          VALUES ('ITEM_NAME') 
           
     END
     
     SELECT ItemName FROM dbo.#TAB_XXXXXXXXXXXX
     -- 临时表可以不使用WITH(NOLOCK)
     
     DROP TABLE #TAB_XXXXXXXXXXXX
END

GO

在SQL SERVER存储过程中, 如果数据较少200条, 也可以使用表变量:

BEGIN
    -- 1. 声明
    DECLARE @V_Repeated  TABLE(ProductID INT)
    
    -- 2. 插入数据
    INSERT INTO @V_Repeated(ProductID)   
    SELECT TOP (50) ProductID
    FROM DBO.Products WITH(NOLOCK)
    
    -- 3. 使用表变量数据
    UODATE DBO.XXXXXXX
    SET  XXXX='VALUE1'
    WHERE PRODUCT_FK IN (
        SELECT TOP 50 ProductID
        FROM @V_Repeated
    )
END