Question

select REPLACE(comments,substring(comments, 
charindex('statement',comments), LEN(comments)),'') 
from Customer 
where charindex('statement',comments) <>0

我只想更换＆＃34;声明＆＃34;来自列注释使用替换功能，但它将记录替换为＆＃39; ＆＃39;没有＆＃34;声明＆＃34;在其中的字符串。

Answer 1

请尝试这样，这只会替换注释中的字符串语句：

declare @Customer table(comments nvarchar(max))
insert into @Customer values('this is a statement'), ('statement is this'), ('this')


select case when charindex('statement',comments) <> 0 then REPLACE(comments,substring(comments, charindex('statement',comments), LEN('statement')),'')
else comments end from @Customer 

select * from @Customer

Answer 2

您应该将其更改为使用大于比较的>

where charindex('statement',comments) > 0

（或）使用like operator

where comments like '%statement%'

SQL替换函数使用CharIndex错误

2 个答案: