String.Join in SQL

Question

i want to select from a Table called RMA(simplified):

 idRMA| RMA_Number
 -----------------------
 1      RMA0006701
 2      RMA0006730
 3               


        

Answer 1

Would this do?

DECLARE @Codes VARCHAR(8000) 
SELECT @Codes = COALESCE(@Codes + ', ': '') +  tdefSymptomCode.SymptomCodeNumber
    FROM  RMA INNER JOIN
        trelRMA_SymptomCode ON RMA.IdRMA = trelRMA_SymptomCode.fiRMA INNER JOIN
        tdefSymptomCode ON trelRMA_SymptomCode.fiSymptomCode = tdefSymptomCode.idSymptomCode
    where idRMA=2
    order by SymptomCodeNumber
return @Codes