Question

I have a table that has several columns. The value of one column is 0 or 1. I want to write a query that returns “Hello” if the value was 0, or “Bye” if it was 1.
What is the appropriate way to write this query?

Answer 1

Use a CASE expression

SELECT CASE YourCol
         WHEN 0 THEN 'Hello'
         WHEN 1 THEN 'Bye'
       END AS SomeAlias
FROM   YourTable