Question

I have a table like this

ID | Type | Val0 | Val1
1  |  0   |  A   | NULL
2  |  1   | NULL |  B

I need to select Val0 when the type is 0, and Val1 when the type is 1, and ValN when type is N…

How can I do that?

Answer 1

SELECT CASE
          WHEN Type = 0 THEN Val0
          WHEN Type = 1 Then Val1
          .
          .
          WHEN Type = N Then ValN
       END 
  FROM tbl