SQL Server：如何在查询中使用子字符串？

Question

我有这样一行：

[Arturo Ochando] <20> 

但我只想：

Arturo Ochando 

我怎样才能做到这一点？

如何在'select'操作中使用它？

更新： 我想找到第一个和最后一个'['']'，只捕捉里面的东西。

例子：

声音：英语版）[钴爪]

回报

钴爪

最好的问候， 瓦尔特·恩里克。

Answer 1

获得第一[和未来]之间的文本。第一[和最后]之间

-- cte for test data 
;with actor_character(character) AS 
(
    select 'voice: English version) [Cobalt Claw]' union all 
    select 'voice: English version) [Cobalt Claw' union all 
    select 'voice: English version) Cobalt Claw]' union all 
    select 'voice: English version) ]Cobalt Claw[' union all 
    select 'voice: English version) Cobalt Claw' 
) 
select *, 
    case 
    -- Test for not valid positions 
    when Start.Pos = 1 or Stop.Pos = 0 
    then character 
    else substring(character, Start.Pos, Stop.Pos-Start.Pos) 
    end 
from actor_character 
    cross apply (select charindex('[', character)+1) as Start(Pos) 
    cross apply (select charindex(']', character, Start.Pos)) as Stop(Pos) 

获取文本。

-- cte for test data 
;with actor_character(character) AS 
(
    select 'voice: English version) [Cobalt Claw]' union all 
    select 'voice: English version) [Cobalt Claw' union all 
    select 'voice: English version) Cobalt Claw]' union all 
    select 'voice: English version) ]Cobalt Claw[' union all 
    select 'voice: English version) [Cobalt]Claw]' union all 
    select 'voice: English version) Cobalt Claw' 
) 
select *, 
    case 
    -- Test for not valid positions 
    when Start.Pos = 0 or Stop.Pos = 0 or Start.Pos > len(character)-Stop.Pos 
    then character 
    else substring(character, Start.Pos+1, len(character)-Stop.Pos-Start.Pos) 
    end 

from actor_character 
    cross apply (select charindex('[', character)) as Start(Pos) 
    cross apply (select charindex(']', reverse(character))) as Stop(Pos) 

Answer 2

select substring(field, charindex('[', field) + 1, charindex(']', field) - charindex('[', field) - 1) 

Answer 3

这听起来像是你需要一个正则表达式来从你的源字符串中获取你需要的数据。

http://justgeeks.blogspot.com/2008/08/adding-regular-expressions-regex-to-sql.html

http://blog.tech-cats.com/2007/09/using-regular-expression-in-sql-server.html