We used php or asp for data cutting. Today, we suddenly found that the Split function in SQL can also be used to cut strings in SQL queries. If you need it, please refer to it.
We used php or asp for data cutting. Today, we suddenly found that the Split function in SQL can also be used to cut strings in SQL queries. If you need it, please refer to it.
Sometimes we use batch operations to Split strings, but SQL Server does not have its own Split function, so we need to implement it ourselves. There's nothing to say. You need to use it directly.
The Code is as follows: |
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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 |
How to use:
The Code is as follows: |
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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 ###' [Value] from [dbo]. [SplitString] (@ str1, ',', 1) Select [Value] from [dbo]. [SplitString] (@ str2, '###', 1) Select [Value] from [dbo]. [SplitString] (@ str3, '###', 0) |
There is also an auto-increment [Id] field, which may be used in some cases, such as saving and sorting by Id.
For example, sort by table ID:
The Code is as follows: |
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Update a set. [Order] = t. [Id] from [dbo]. [Table] as a join [dbo]. splitString ('1, 2, 3 ', 1) as t on. [Id] = t. [Value] |
Instance
The Code is as follows: |
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Create function [dbo]. [split] ( @ SourceSql varchar (8000 ), @ StrSeprate varchar (10) ) Returns @ temp table (F1. varchar (100 )) As Begin Declare @ I int Set @ SourceSql = rtrim (ltrim (@ SourceSql )) Set @ I = charindex (@ StrSeprate, @ SourceSql) While @ I> = 1 Begin If len (left (@sourcesql, @ i-1)> 0 Begin Insert @ temp values (left (@ SourceSql, @ i-1 )) End Set @ SourceSql = substring (@ SourceSql, @ I + 1, len (@ SourceSql)-@ I) Set @ I = charindex (@ StrSeprate, @ SourceSql) End If @ SourceSql <>'' Insert @ temp values (@ SourceSql) Return End Select * from split (', 777, 11, 888, 88, 1122,888, 88,77, 00, 00 ',',') |