How Can I Split Comma-Separated Strings in T-SQL 2008 R2?

Split string in T-SQL 2008 R2

In SQL Server 2008 R2, users face challenges when trying to split comma-delimited strings. Despite searching StackOverflow, it seems that the available solutions may not be compatible with this version.

Solution

To efficiently split strings in T-SQL 2008 R2, the following user-defined functions can be used:

<code class="language-sql">CREATE FUNCTION dbo.splitstring ( @stringToSplit VARCHAR(MAX) )
RETURNS
 @returnList TABLE ([Name] [nvarchar] (500))
AS
BEGIN

 DECLARE @name NVARCHAR(255)
 DECLARE @pos INT

 WHILE CHARINDEX(',', @stringToSplit) > 0
 BEGIN
  SELECT @pos  = CHARINDEX(',', @stringToSplit)  
  SELECT @name = SUBSTRING(@stringToSplit, 1, @pos-1)

  INSERT INTO @returnList 
  SELECT @name

  SELECT @stringToSplit = SUBSTRING(@stringToSplit, @pos+1, LEN(@stringToSplit)-@pos)
 END

 INSERT INTO @returnList
 SELECT @stringToSplit

 RETURN
END</code>

Examples of usage

To use this function, execute the following query:

<code class="language-sql">SELECT * FROM dbo.splitstring('91,12,65,78,56,789')</code>

This query will return a result table containing individual string elements separated by commas.

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