Sql Server -- 去除非数字字符

问题描述

我有一张桌子

SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

CREATE TABLE [dbo].[TestAB](
    [A] [int] IDENTITY(1,1) NOT NULL,
    [B] [nvarchar](10) NULL,
 CONSTRAINT [PK_TestAB] PRIMARY KEY CLUSTERED 
(
    [A] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]

GO

值喜欢

INSERT INTO [TestAB]([B]) 
    VALUES('A1');

INSERT INTO [TestAB]([B]) 
    VALUES('A2');

INSERT INTO [TestAB]([B]) 
    VALUES('A5');

INSERT INTO [TestAB]([B]) 
    VALUES('A4');

INSERT INTO [TestAB]([B]) 
    VALUES('AA5');

INSERT INTO [TestAB]([B]) 
    VALUES('A9');

INSERT INTO [TestAB]([B]) 
    VALUES('C7');

INSERT INTO [TestAB]([B]) 
    VALUES('D8');

INSERT INTO [TestAB]([B]) 
    VALUES('D-9');

INSERT INTO [TestAB]([B]) 
    VALUES('R$10');

我想去掉非数字字符并将 nvarchar 数字转换为 int，然后比较它们的位置！=

I want to strip off the non numeric characters and cast the nvarchar numbers to int and then compare where they are !=

推荐答案

Select A,B,Case when A<>B then 0 else 1 end
from
(
select
A,
Cast(
Left(SubString(B, PatIndex('%[0-9.-]%', B), 100),
     PatIndex('%[^0-9.-]%', SubString(B, PatIndex('%[0-9.-]%', B), 100)+'_' )-1)
as int) as B
from TestAB
) aa 
where A<>B

SQL-Fiddle