如何在 2017 年之前修剪 SQL Server 中的字符串？

Question

在 SQL Server 2017 中，您可以使用此语法，但不能在早期版本中使用：

SELECT Name = TRIM(Name) FROM dbo.Customer;

Answer 1

SELECT LTRIM(RTRIM(Names)) AS Names FROM Customer

Answer 2

To Trim on the right, use:

SELECT RTRIM(Names) FROM Customer

To Trim on the left, use:

SELECT LTRIM(Names) FROM Customer

To Trim on the both sides, use:

SELECT LTRIM(RTRIM(Names)) FROM Customer

Answer 3

I assume this is a one-off data scrubbing exercise. Once done, ensure you add database constraints to prevent bad data in the future eg

ALTER TABLE Customer ADD
   CONSTRAINT customer_names__whitespace
      CHECK (
             Names NOT LIKE ' %'
             AND Names NOT LIKE '% '
             AND Names NOT LIKE '%  %'
            );

Also consider disallowing other characters (tab, carriage return, line feed, etc) that may cause problems.

It may also be a good time to split those Names into family_name , first_name , etc :)

Answer 4

SELECT LTRIM(RTRIM(Replace(Replace(Replace(name,'   ',' '),CHAR(13), ' '),char(10), ' ')))
from author

Answer 5

“替换”的扩展版本：

REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(RTRIM(LTRIM(REPLACE("Put in your Field name", ' ',' '))),'''',''), CHAR(9), ''), CHAR(10), ''), CHAR(13), ''), CHAR(160), '') [CorrValue]

Answer 6

in sql server 2008 r2 with ssis expression we have the trim function .

SQL Server Integration Services (SSIS) is a component of the Microsoft SQL Server database software that can be used to perform a broad range of data migration tasks.

you can find the complete description on this link

http://msdn.microsoft.com/en-us/library/ms139947.aspx

but this function have some limitation in itself which are also mentioned by msdn on that page. but this is in sql server 2008 r2

TRIM("   New York   ") .The return result is "New York".

Answer 7

To trim any set of characters from the beginning and end of a string, you can do the following code where @TrimPattern defines the characters to be trimmed. In this example, Space, tab, LF and CR characters are being trimmed:

Declare @Test nvarchar(50) = Concat (' ', char(9), char(13), char(10), ' ', 'TEST', ' ', char(9), char(10), char(13),' ', 'Test', ' ', char(9), ' ', char(9), char(13), ' ')

DECLARE @TrimPattern nvarchar(max) = '%[^ ' + char(9) + char(13) + char(10) +']%'

SELECT SUBSTRING(@Test, PATINDEX(@TrimPattern, @Test), LEN(@Test) - PATINDEX(@TrimPattern, @Test) - PATINDEX(@TrimPattern, LTRIM(REVERSE(@Test))) + 2)

Answer 8

从客户中选择替换（名称，''，''）