Select distinct values from multiple columns in same table

Question

I am trying to construct a single SQL statement that returns unique, non-null values from multiple columns all located in the same table.

 SELECT distinct tb         


        

Answer 1

Try this if you have more than two Columns:

CREATE TABLE #temptable (Name1 VARCHAR(25),Name2 VARCHAR(25))

INSERT INTO #temptable(Name1, Name2)
  VALUES('JON', 'Harry'), ('JON', 'JON'), ('Sam','harry')

SELECT t.Name1+','+t.Name2 Names  INTO #t FROM #temptable AS tSELECT DISTINCT ss.value FROM #t AS t
  CROSS APPLY STRING_SPLIT(T.Names,',') AS ss