如何在varchar中获取max no并增加1 [英] How to get the max no in varchar and increment by 1

问题描述

在SQL Server数据库中，我有一个数据类型为varchar（20）的字段。

每个带有前缀EMB的数据插入。假设我在该领域有三个数据。这些是

MBA00001

MBA00002

MBA004042

MBA00500



这里最大数字是MBA004042，但查询

选择max（TraRentAsset），因为RentInfo的TraRentAsset带来了MBA00500。

如何定义MBA004042并增加1结果将是MBA004043。

请帮帮我。我将非常感谢你。

In SQL Server database I there is a field which datatype is varchar(20).
Every data insert with a prefix EMB. Suppose I have three data in the field. These are
MBA00001
MBA00002
MBA004042
MBA00500

Here the max number is MBA004042 but the query
select max(TraRentAsset) as TraRentAsset from RentInfo brings MBA00500.
How can I define the MBA004042 and increment 1. The result will be now MBA004043.
Please help me. I will be very grateful to you.

推荐答案

select top 1 TraRentAsset from RentInfo
order by cast(SUBSTRING(TraRentAsset, 4, LEN(TraRentAsset)) as int) desc

DEMO [ ^ ]

使用它..

Use this..

select max(substring(isnull(TraRentAsset,'MBA0'),4,len(isnull(TraRentAsset ,'MBA0'))))+1 

检查这个

check this

Create table #file(col1 varchar(20))
insert into #file select 'MBA00001'
insert into #file select 'MBA00002'
insert into #file select 'MBA004042'
insert into #file select 'MBA00500'

select  'MBA'+Convert(Varchar(20),MAX(convert(int,REPLACE(col1,'MBA','')))) from #file

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