sql 自定义百分比转换小数函数代码

--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 (NFN, NIF, NTF))
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 (NFN, NIF, NTF))
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)