BenB BenB - 5 months ago 12
SQL Question

SQL MAX of multiple columns?

How do you return 1 value per row of the max of several columns:

TableName

[Number, Date1, Date2, Date3, Cost]


I need to return something like this:

[Number, Most_Recent_Date, Cost]


Query?

Answer

Well, you can use the CASE statement:

SELECT
    CASE
        WHEN Date1 >= Date2 AND Date1 >= Date3 THEN Date1
        WHEN Date2 >= Date1 AND Date2 >= Date3 THEN Date2
        WHEN Date3 >= Date1 AND Date3 >= Date2 THEN Date3
        ELSE                                        Date1
    END AS MostRecentDate
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