I want to add a new column using SELECT query and get a latest value from multiple columns in SQL

Question

Outcome1 Outcome2 Outcome3 Outcome4 DESIRED OUTCOME CR CR CR C CR CR CR N CR N CR CR C C C C C C C CC CC CR CC CC CR

Answer 1

It seems you simply need the first not-null value. If so, You can use COALESCE function -

SELECT COALESCE(Outcome1, Outcome2, Outcome3, Outcome4)
  FROM your_table;