Ms Sql Function for list - mysql

Question

I have varchar values like below
72,73,74
I try to split as a comma after that i want to convert to int above values.Than i want to match Id with my User Table.
CREATE FUNCTION Fn_MyFunction(#MyUserIdValues VARCHAR(100))
RETURNS VARCHAR(300) AS
BEGIN
DECLARE #Result VARCHAR(300) = ''
Select UserName From UserTable
Where MyUserIdValues=UserIdValues
RETURN #Result
#Result must be like below in one column
Joe,Michael,Ricky
Any help will be appreciated.
Thanks.

Answer 1

The classic way of doing this...
/*
create table Users
(
id int,
name nvarchar(max)
)
insert into Users
values
(72, 'Joe'),
(73, 'Michael'),
(74, 'Ricky'),
(75, 'Manny'),
(76, 'Bob')
*/
CREATE FUNCTION dbo.Fn_MyFunction(#IdValues VARCHAR(100))
RETURNS NVARCHAR(max) AS
BEGIN
DECLARE #Result NVARCHAR(max);
DECLARE #delimiter as nchar = ',';
WHILE LEN(#IdValues) <> 0
BEGIN
Declare #CurrentId int;
If CHARINDEX(#delimiter, #IdValues) = 0
begin
Set #CurrentId = cast(#IdValues as int);
Set #IdValues = ''
End
Else
begin
Set #CurrentId = cast(left(#IdValues, charindex(#delimiter, #IdValues) -1) as int)
Set #IdValues = Substring(#IdValues, charindex(#delimiter, #IdValues) +1, len(#IdValues))
End
select #Result = Isnull(#Result + ',', '') + Isnull((Select Name From Users Where Id=#CurrentId),'(unknown)')
END
RETURN #Result
END
GO
Select dbo.Fn_MyFunction('72,73,74')
--Joe,Michael,Ricky
Select dbo.Fn_MyFunction('72,0,74')
--Joe,(unknown),Ricky
Select dbo.Fn_MyFunction('72,73,72,74,74')
--Joe,Michael,Joe,Ricky,Ricky

Answer 2

GROUP_CONCAT and FIND_IN_SET might be a handy for you.
Try this:
SELECT GROUP_CONCAT(UserName)
FROM UserTable
WHERE FIND_IN_SET(MyUserIdValues,'72,73,74');

Answer 3

I had found solution for splitting string and inserting it in a table
GO
/****** Object: UserDefinedFunction [dbo].[Split] Script Date: 10/03/2013 11:45:16 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER FUNCTION [dbo].[Split] (
#InputString VARCHAR(8000),
#Delimiter VARCHAR(50)
)
RETURNS #Items TABLE (
Item int
)
AS
BEGIN
IF #Delimiter = ' '
BEGIN
SET #Delimiter = ','
SET #InputString = REPLACE(#InputString, ' ', #Delimiter)
END
IF (#Delimiter IS NULL OR #Delimiter = '')
SET #Delimiter = ','
DECLARE #Item VARCHAR(8000)
DECLARE #ItemList VARCHAR(8000)
DECLARE #DelimIndex INT
SET #ItemList = #InputString
SET #DelimIndex = CHARINDEX(#Delimiter, #ItemList, 0)
WHILE (#DelimIndex != 0)
BEGIN
SET #Item = SUBSTRING(#ItemList, 0, #DelimIndex)
INSERT INTO #Items VALUES (#Item)
-- Set #ItemList = #ItemList minus one less item
SET #ItemList = SUBSTRING(#ItemList, #DelimIndex+1, LEN(#ItemList)-#DelimIndex)
SET #DelimIndex = CHARINDEX(#Delimiter, #ItemList, 0)
END -- End WHILE
IF #Item IS NOT NULL -- At least one delimiter was encountered in #InputString
BEGIN
SET #Item = #ItemList
INSERT INTO #Items VALUES (#Item)
END
-- No delimiters were encountered in #InputString, so just return #InputString
ELSE INSERT INTO #Items VALUES (cast(#InputString as int))
RETURN
END -- End Function
Select UserName From UserTable where MyUserIdValues in(Select Item from Split('72,73,74',','))
//Call function Split using last query

Answer 4

Check this out, it will solve your problem and it simple and perfect method
Select Username from UserTable where MyUserIdValues IN ' + '('+ #Id +')'

Answer 5

My attempt (i think it's a little neater):
create function dbo.fn_UserNames(#ids varchar(max))
returns varchar(max) as
begin
set #ids = #ids + ','
declare #id table (Id int)
while(#ids != '') begin
insert into #id
select i
from (select substring(#ids, 1, charindex(',', #ids, 0) - 1) i) a
where i != ''
if #ids like '%,%'
set #ids = substring(#ids, charindex(',', #ids, 0) + 1,
len(#ids) - charindex(',', #ids, 0))
else
set #ids = ''
end
declare #ret varchar(max)
select #ret = isnull(#ret, '') + a.UserName + ','
from adhoc.UserTable a
join #id b on a.UserId = b.Id
return #ret
end

Answer 6

Hi you can try this one also.
CREATE FUNCTION [DBO].[FN_SPLIT] ( #STRSTRING VARCHAR(MAX))
RETURNS #NAME TABLE (NAME VARCHAR(MAX))
AS
BEGIN
DECLARE #USERID TABLE(ID INT)
DECLARE #USERS TABLE (ID INT , NAME VARCHAR(50))
INSERT INTO #USERS VALUES (72,'A'),(73,'B'),(74,'C')
;WITH STR_CTE(_START, _STOP) AS
(
SELECT 1, CHARINDEX(',' , #STRSTRING )
UNION ALL
SELECT CAST(_STOP + 1 AS INT), CHARINDEX(',' ,#STRSTRING , CAST((_STOP + 1) AS INT))
FROM
STR_CTE
WHERE _STOP > 0
)
INSERT INTO #USERID (ID)
SELECT
SUBSTRING(#STRSTRING , _START, CASE WHEN _STOP > 0 THEN _STOP -_START ELSE 4000 END) AS ID
FROM STR_CTE
DECLARE #STRNAME VARCHAR(MAX)
SELECT
#STRNAME = COALESCE(#STRNAME+',','') + U.NAME
FROM
#USERID UD
INNER JOIN
#USERS U ON UD.ID = U.ID
INSERT INTO #NAME
SELECT #STRNAME
RETURN;
END