Best way to do nested case statement logic in SQL Server

Question

I\'m writing an SQL Query, where a few of the columns returned need to be calculated depending on quite a lot of conditions.

I\'m currently using nested case stateme

Answer 1

Wrap all those cases into one.

---

SELECT
    col1,
    col2,
    col3,
    CASE
        WHEN condition1 THEN calculation1 
        WHEN condition2 THEN calculation2
        WHEN condition3 THEN calculation3
        WHEN condition4 THEN calculation4
        WHEN condition5 THEN calculation5
        ELSE NULL         
    END AS 'calculatedcol1',
    col4,
    col5 -- etc
FROM table