sql 自定义百分比转换小数函数代码

复制代码 代码如下: –CAST 和 CONVERT 函数 Percentage DECLARE @dec decimal(5,3), @var varchar(10),@hun decimal(5,1) set @dec=0.025 set @hun=@dec*100 set @var=cast(@hun as varchar(20))+’%’ select @var —小数转化为百分数函数

复制代码 代码如下: –CAST 和 CONVERT 函数 Percentage DECLARE @dec decimal(5,3), @var varchar(10),@hun decimal(5,1) set @dec=0.025 set @hun=@dec*100 set @var=cast(@hun as varchar(20))+’%’ select @var —小数转化为百分数函数 GetPercentageString —涂聚文 Geovin Du if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[GetPercentageString]’) and xtype in (N’FN’, N’IF’, N’TF’)) drop function [dbo].[GetPercentageString] GO CREATE function GetPercentageString ( @dec decimal(10,3) ) returns varchar(20) AS BEGIN DECLARE @var varchar(10),@hun decimal(10,1) SET @hun=@dec*100 SET @var=cast(@hun as varchar(20))+’%’ RETURN @var END GO –测试数据 涂聚文 Geovin Du SELECT [dbo].[GetPercentageString] (0.05) SELECT [dbo].[GetPercentageString] (0.25) SELECT [dbo].[GetPercentageString] (1.25) –1. 查询字符串中是否包含非数字字符 SELECT PATINDEX(‘%[^0-9]%’, ‘1235X461’) SELECT PATINDEX(‘%[^0-9]%’, ‘12350461’) –2. 查询字符串中是否包含数字字符 SELECT PATINDEX(‘%[0-9]%’, ‘SUYLLGoO’) SELECT PATINDEX(‘%[0-9]%’, ‘SUYLLG0O’) DECLARE @dec decimal(10,4), @var varchar(10),@hun decimal(10,4),@I INT,@K INT,@S VARCHAR(20) SET @var=’5.23%’ –SELECT @K=LEN(@var) –SELECT @S=LEFT(@var,@K-1) SELECT @S=RIGHT(@var,1) –SELECT @S SELECT @I=CHARINDEX(‘%’,@S) IF @I>0 BEGIN SET @var=REPLACE(@var,’%’,”) SET @hun=CAST(@var AS decimal(10,4)) SET @dec=@hun/100 SELECT @dec END ELSE BEGIN SELECT @dec=NULL –‘无效数据’ END –百分数转化为小数函数 GetPercentageNumber —涂聚文 Geovin Du if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[GetPercentageNumber]’) and xtype in (N’FN’, N’IF’, N’TF’)) drop function [dbo].[GetPercentageNumber] GO CREATE function GetPercentageNumber ( @var varchar(10) ) returns decimal(10,4) AS BEGIN DECLARE @dec decimal(10,4), @hun decimal(10,4),@I INT,@K INT,@S VARCHAR(20) SELECT @S=RIGHT(@var,1) –SELECT @S SELECT @I=CHARINDEX(‘%’,@S) IF @I>0 BEGIN SET @var=REPLACE(@var,’%’,”) SET @hun=CAST(@var AS decimal(10,4)) SET @dec=@hun/100 –SELECT @dec END ELSE BEGIN SELECT @dec=NULL –‘无效数据’ END RETURN @dec END GO –测试数据 涂聚文 Geovin Du SELECT [dbo].[GetPercentageNumber] (‘5.23%’) SELECT [dbo].[GetPercentageNumber] (‘%0.23’)