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I need help with iterating the records of a database table and populating a field with the concatenation of 2 fields in the table.

Posted on 2008-06-16
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Last Modified: 2013-11-26
I currently have a table with the Following fields and records:

Class_ID, Class_Day, Start_Time, End_Time
"GMS-557-01","T","08:30AM","10:50AM"
"GMS-557-01","TH","08:30AM","10:50AM"
"GMS-595Y-01","T","1:00PM","2:50PM"
"GMS-610-01","M","08:30AM","11:50PM"
"GMS-623-01","M","01:00PM","05:50PM"
"GMS-623-01","W","03:00PM","04:50PM"
"GMS-623-01","F","01:00PM","02:30PM"
"GMS-649-01","W","08:00AM","09:50AM"
"GMS-649-01","F","08:00AM","09:50AM"
"GMS-710-01","TBA","08:00AM","09:50AM"

After running a stored procedure preferably or a vb2005 sub procedure in the code of my asp.net 2.0 project I need to have the day(s) that each class meets concatenated and entered in the Class_Days field.

Class_ID, Class_Day, Start_Time, End_Time, Class_Days
"GMS-557-01","T","08:30AM","10:50AM","T,TH"
"GMS-557-01","TH","08:30AM","10:50AM","T,TH"
"GMS-595Y-01","T","1:00PM","2:50PM","T"
"GMS-610-01","M","08:30AM","11:50PM","M"
"GMS-623-01","M","01:00PM","05:50PM","M,W,F"
"GMS-623-01","W","03:00PM","04:50PM","M,W,F"
"GMS-623-01","F","01:00PM","02:30PM","M,W,F"
"GMS-649-01","W","08:00AM","09:50AM",,"W,F"
"GMS-649-01","F","08:00AM","09:50AM",,"W,F"
"GMS-710-01","TBA","08:00AM","09:50AM","TBA"

Your help is greatly appreciated!
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Question by:RosePat
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4 Comments
 
LVL 42

Accepted Solution

by:
EugeneZ earned 500 total points
ID: 21796298
create UDF function like in example below (just change table name t1 to yours):


 
create table t1 (Class_ID varchar(50), Class_Day varchar(50), Start_Time varchar(50), End_Time varchar(50))
insert into t1
select 'GMS-557-01','T','08:30AM','10:50AM'
union all
select 'GMS-557-01','TH','08:30AM','10:50AM'
union all
select 'GMS-595Y-01','T','1:00PM','2:50PM'
union all
select 'GMS-610-01','M','08:30AM','11:50PM'
union all
select 'GMS-623-01','M','01:00PM','05:50PM'
union all
select 'GMS-623-01','W','03:00PM','04:50PM'
union all
select 'GMS-623-01','F','01:00PM','02:30PM'
union all
select 'GMS-649-01','W','08:00AM','09:50AM'
union all
select 'GMS-649-01','F','08:00AM','09:50AM'
union all
select 'GMS-710-01','TBA','08:00AM','09:50AM'
 
go
--create UDF 
create   FUNCTION  udf_Class_Days (@Class_ID varchar(30))
RETURNS VARCHAR(8000)
AS
BEGIN
DECLARE @strOutput VARCHAR(8000)
 
SELECT @strOutput =	
 
 
	COALESCE(@strOutput + ',','') +Class_Day	
                
	FROM	dbo. t1
	WHERE	[Class_ID] = @Class_ID
	
 
	RETURN @strOutput
end
 
GO
-----------------
-- Test code:
 
select *,dbo.udf_Class_Days(Class_ID) from t1

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Author Comment

by:RosePat
ID: 21796920
Thank you so much EugeneZ, this is great!  You well deserve your rank!
Here is my test and the results I got:
My test:

select * ,dbo.udf_Class_Day('GMS-623-01') as ALL_Days from MyClass
where Class_ID =N'GMS-623-01'

GMS-623-01      M      01:00PM      05:50PM      NULL      M,W,F
GMS-623-01      W      03:00PM      04:50PM      NULL      M,W,F
GMS-623-01      F      01:00PM      02:30PM      NULL      M,W,F
Thanks so much!!!
0
 

Author Closing Comment

by:RosePat
ID: 31467704
EugeneZ, this is the 1st time I post a question.  You have no idea how much your answer will help me and my project. Thank you so much EugeneZ. You well deserve your rank!
Here is my test and the results I got:
select * ,dbo.udf_Class_Day('GMS-623-01') as ALL_Days from MyClass
where Class_ID =N'GMS-623-01'

GMS-623-01      M      01:00PM      05:50PM      NULL      M,W,F
GMS-623-01      W      03:00PM      04:50PM      NULL      M,W,F
GMS-623-01      F      01:00PM      02:30PM      NULL      M,W,F
Thanks you so much again!!!
0
 
LVL 42

Expert Comment

by:EugeneZ
ID: 21798506
you are very welcome :)
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