Question

我有像

这样的字符串

WebApp - 10148

Smart - App - 1458

预期结果

WebApp

Smart - App

我想将字符从 - 修剪为右边的数字。

我尝试了以下查询，结果就是这个

select LEFT(app+' - ', CHARINDEX(' - ',app+' - ')-1) from repository

WebApp
Smart

任何人都可以协助我对此进行排序吗？

Answer 1

试试这个：

reverse(right(reverse(@string), len(@string) - charindex('-',reverse(@string),1)));

Answer 2

只是为了一种有趣的CTE重复方法（我使用Rahul的回答:-)）

DECLARE @tbl TABLE(x VARCHAR(100));
INSERT INTO @tbl VALUES('WebApp - 10148'),('Smart - App - 1458');

WITH FindHyphens AS
(
    SELECT x,0 AS StartInx, PATINDEX('% - %',x) AS PosHyphen,SUBSTRING(x,PATINDEX('% - %',x)+1,1000) AS Subst FROM @tbl
    UNION ALL
    SELECT x,StartInx+PATINDEX('% - %',Subst),PATINDEX('% - %',Subst),SUBSTRING(Subst,PATINDEX('% - %',Subst)+1,1000)
    FROM FindHyphens
    WHERE PATINDEX('% - %',Subst)>0
)
,FindLastHyphen AS
(
    SELECT x, MAX(StartInx+PosHyphen)-1 AS LastPos
    FROM FindHyphens
    GROUP BY x
)
SELECT SUBSTRING(x,1,LastPos)
FROM FindLastHyphen

根据字符修剪字符串

2 个答案: