SQL Server T-SQL Collate Multiple Rows for a given column into a single cell following a join

Question

Hi,

I have a table as below:

Now for a given instructor ID my query need to select something like this:

Please note I will pass in the InstructorID in the query or output will be based on a join of another table based on InstructorID as foreign key.

Can you help me solve this please? Thanks in advance.

Answer 1

SELECT InstructorID , STRING_AGG(CONVERT(NVARCHAR(max), LearnerID), '|')   
WITHIN GROUP (ORDER BY LearnerID ASC) AS LearnerIDs   
FROM yourtable  
GROUP BY InstructorID ;  

Answer 2

Hi @Anonymous
Try this query:

SELECT InstructorID ,  
       STUFF((SELECT '|' + CAST(LearnerID AS VARCHAR(50)) FROM TableName WHERE InstructorID =T.InstructorID  FOR XML PATH(''))  
		    ,1,1,'')AS LearnerIDs   
FROM (SELECT DISTINCT InstructorID  FROM TableName)T  

Best regards,
LiHong

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