String segmentation functions in SQL

Source: Internet
Author: User
Tags rtrim
The code is as follows: Copy code

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

/* By kudychen 2011-9-28 */
CREATE function [dbo]. [SplitString]
(   
@ Input nvarchar (max), -- input string to be separated
@ Separator nvarchar (max) = ',', -- a string that delimit the substrings in the input string
@ RemoveEmptyEntries bit = 1 -- the return value does not include array elements that contain an empty string
)
Returns @ TABLE table
(   
[Id] int identity (1, 1 ),
[Value] nvarchar (max ))
As
Begin
Declare @ Index int, @ Entry nvarchar (max)
Set @ Index = charindex (@ Separator, @ Input)

While (@ Index> 0)
Begin
Set @ Entry = ltrim (rtrim (substring (@ Input, 1, @ Index-1 )))

If (@ RemoveEmptyEntries = 0) or (@ RemoveEmptyEntries = 1 and @ Entry <> '')
Begin
Insert into @ TABLE ([Value]) Values (@ Entry)
End

Set @ Input = substring (@ Input, @ Index + datalength (@ Separator)/2, len (@ Input ))
Set @ Index = charindex (@ Separator, @ Input)
End

Set @ Entry = ltrim (rtrim (@ Input ))
If (@ RemoveEmptyEntries = 0) or (@ RemoveEmptyEntries = 1 and @ Entry <> '')
Begin
Insert into @ TABLE ([Value]) Values (@ Entry)
End
Return

End

Test Code:

The code is as follows: Copy code

Declare @ str1 varchar (max), @ str2 varchar (max), @ str3 varchar (max)

Set @ str1 = '1, 2, 3'
Set @ str2 = '1 ### 2 ### 3'
Set @ str3 = '1 #### 2 ### 3 ###'

Select [Value] from [dbo]. [SplitString] (@ str1, ',', 1)
Select [Value] from [dbo]. [SplitString] (@ str2, '###', 1)
Select [Value] from [dbo]. [SplitString] (@ str3, '###', 0)

Code:

The code is as follows: Copy code

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

/* By kudychen 2011-9-28 */
CREATE function [dbo]. [SplitString]
(   
@ Input nvarchar (max), -- input string to be separated
@ Separator nvarchar (max) = ',', -- a string that delimit the substrings in the input string
@ RemoveEmptyEntries bit = 1 -- the return value does not include array elements that contain an empty string
)
Returns @ TABLE table
(   
[Id] int identity (1, 1 ),
[Value] nvarchar (max ))
As
Begin
Declare @ Index int, @ Entry nvarchar (max)
Set @ Index = charindex (@ Separator, @ Input)

While (@ Index> 0)
Begin
Set @ Entry = ltrim (rtrim (substring (@ Input, 1, @ Index-1 )))

If (@ RemoveEmptyEntries = 0) or (@ RemoveEmptyEntries = 1 and @ Entry <> '')
Begin
Insert into @ TABLE ([Value]) Values (@ Entry)
End

Set @ Input = substring (@ Input, @ Index + datalength (@ Separator)/2, len (@ Input ))
Set @ Index = charindex (@ Separator, @ Input)
End

Set @ Entry = ltrim (rtrim (@ Input ))
If (@ RemoveEmptyEntries = 0) or (@ RemoveEmptyEntries = 1 and @ Entry <> '')
Begin
Insert into @ TABLE ([Value]) Values (@ Entry)
End
Return

End

Test Code:

The code is as follows: Copy code

Declare @ str1 varchar (max), @ str2 varchar (max), @ str3 varchar (max)

Set @ str1 = '1, 2, 3'
Set @ str2 = '1 ### 2 ### 3'
Set @ str3 = '1 #### 2 ### 3 ###'

Select [Value] from [dbo]. [SplitString] (@ str1, ',', 1)
Select [Value] from [dbo]. [SplitString] (@ str2, '###', 1)
Select [Value] from [dbo]. [SplitString] (@ str3, '###', 0)

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.