How to split comma delimited string?

Question

Hi,
I have a parameter called Id in my SP which will be of nvarchar data type and i'm going to get the multiple ids at a time seperated by commas in that parameter from the application. Now my requirement is to update a table with these comma seperated ids in seperate rows.
For example, if i have 2 parameters called Id1 and Id2. Id1 will contain only one value and will be of int data type and Id2 will be of nvarchar data type as i can get multiple ids delimited by a comma from the application. Suppose Id1 = 1 and Id2 = '1,2,3,4'. Then I have to update id2 in the tables seperately like wherever Id1 is '1' i need to update Id2 column for 4 rows with the value 1, 2, 3, 4 respectively in different rows.
Could you please tell me how can i do this in T-SQL? How can i split the data of parameter Id2 in 4 different rows?
Please let me know if you did not understand the question.
Thanks,
Deepti

Answer 1

 deeptideshpande wrote:
Hi,
I got a similar function which is like this:
CREATE FUNCTION dbo.fnSplit(
@sInputList VARCHAR(8000) -- List of delimited items
, @sDelimiter VARCHAR(8000) = ',' -- delimiter that separates items
) RETURNS @List TABLE (item VARCHAR(8000))
BEGIN
DECLARE @sItem VARCHAR(8000)
WHILE CHARINDEX(@sDelimiter,@sInputList,0) <> 0
BEGIN
SELECT
@sItem=RTRIM(LTRIM(SUBSTRING(@sInputList,1,CHARINDEX(@sDelimiter,@sInputList,0)-1))),
@sInputList=RTRIM(LTRIM(SUBSTRING(@sInputList,CHARINDEX(@sDelimiter,@sInputList,0)+LEN(@sDelimiter),LEN(@sInputList))))
IF LEN(@sItem) > 0
INSERT INTO @List SELECT @sItem
END
IF LEN(@sInputList) > 0
INSERT INTO @List SELECT @sInputList -- Put the last item in
RETURN
END
GO
Now when i use this in my select statement, i get data in a tabular structure as shown below:
select
from dbo.fnSplit('1,22,333,444,,5555,666',
Results
Item
1
22
333
444
5555
666
Now my requirement is to insert this value in a table which has 2 columns ID1 and ID2.
At any point of time ID1 will be an int value(only one id in that parameter) and ID2 can have multiple ids delimited by comma. With the help of above split function i can split values of ID2 into 6 different ids but i need to insert the table
in the following way:
ID1     ID2
1        1
1        22
1        333
1        444
1        5555
1        666
How can i insert the data in the above mentioned fashion.
Thanks,
Deepti
Like this:
Code Snippet
select 1 as id,* from dbo.fnSplit('1,22,333,444,,5555,666', ',')
Great!!!! Wonderfull!!!... Thanks a lot.