sql基础知识

code：

/********************************************/

/*      CREATE PROC HYEY.WL 09-06-23        */

/********************************************/

--T-sql 查询

SELECT * FROM dbo.TabTest



--删除表中内容

--TRUNCATE TABLE  dbo.TabTest



-- 要创建存储过程的数据库



USE Northwind



-- 判断要创建的存储过程名是否存在

IF(Select name From sysobjects Where name ='MyTestProc' And Type='p')



-- 删除存储过程



Drop Procedure dbo.MyTestProc

GO



-- 创建存储过程

CREATE PROC dbo.MyTestProc



-- 存储过程参数

@sumPrice money 

AS



set @sumPrice = 1.1

 -- 存储过程语句体

SELECT @sumPrice=SUM(testNum) from dbo.TabTest



SELECT testID , cast(cast(str(SUM(testNum)/@sumPrice*100,5,2)   as   varchar)as   varchar)+'%'   AS Per INTO #TempPer FROM dbo.TabTest GROUP BY testID



SELECT * FROM #TempPer



 -- 执行

 GO





-- 执行存储过程



EXEC MyTestProc



GO



--EXEC csp_AddInfo 'Junn.A','123456',20,'男'

DECLARE @sumPrice MONEY

EXEC MyTestProc @sumPrice





--Test PROC

DECLARE @sumPrice MONEY



SELECT @sumPrice=SUM(testNum) from dbo.TabTest



SELECT testID ,SUM(testNum)/@sumPrice AS Per INTO #TempPer FROM dbo.TabTest GROUP BY testID





SELECT * FROM #TempPer



--Test WL one

declare   @data   as   decimal(18,5)   

set   @data   =   0.12345   

    

select   cast(cast(@data   *   100   as   decimal(18,2))   as   varchar(10))   +   '%'   as   结果





--Test WL two



declare   @a   decimal(15,4)   

set   @a=.1234   

select   cast(cast(@a*100   as   varchar)as   varchar)+'%'   

select   cast(cast(str(@a*100,5,2)   as   varchar)as   varchar)+'%' 

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