sql - Get a substring truncated in SQL Server

Question

Question for everyone... I have some values I've inserted into a table as I try to play around with string functions. What I'm trying to do is remove the end of the string and keep everything before it:

CREATE TABLE #BrokerNameT
  (
     BrokerName VARCHAR(100)
  )

INSERT INTO #BrokerNameT
            (BrokerName)
VALUES      ('Peter Pan Co Cash'),
            ('Batman Co Cash'),
            ('Spiderman Algo'),
            ('Spiderman Cash') 

Here what I'm looking to is simply return: 'Peter Pan Co', 'Batman Co', and 'Spiderman'

Is it possible to search for the first space from the end of a string? If i was able to do that, couldn't I just then keep everything before the first space?

Any idea how I'd go about doing this?

Could I use two reverses to achieve this?

Answer 1

反转字符串，然后找到第一个空格的位置，然后您就知道最后一个空格距离末尾有多远。

SELECT
  SUBSTRING(
    BrokerName,
    1,
    LEN(BrokerName) - CHARINDEX(' ', REVERSE(BrokerName))
  )
FROM
  #BrokerNameT

Answer 2

这是一个查询：

select *,
       left(BrokerName, len(BrokerName) - charindex(' ', reverse(BrokerName))
           ) as AllButLast
from BrokerNameT

这是一个 SQLFiddle 来演示它。