Server:如何在查询中使用子字符串？

Question

我有这样的一排：

Arturo Ochando <20>

但我只想：

Arturo Ochando

我怎么能这么做？

在“select”操作中如何使用？

更新：，我想找到第一个和最后一个'‘，只捕捉里面的东西。

示例：

语音:英文版)钴爪

返回

钴爪

向你问好，瓦尔特·亨里克。

Answer 1

获取第一个[和下一个]之间的文本。

-- 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'
)
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)

获取第一个[和最后一个]之间的文本。

-- 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

听起来，您需要一个正则表达式，才能从源字符串中获取所需的数据。

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

Answer 3

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