Question

How can I return two columns that each use different WHERE critia? Obviously, this won’t work:

SELECT Name, COUNT(Column1) AS Total, COUNT(Column1) AS YearToDate
FROM Table1
WHERE Occurred_Date BETWEEN '2010-06-01' AND '2010-06-30' --Total
WHERE Occurred_Date BETWEEN '2010-01-01' AND '2010-06-30' --YearToDate

This is the output I’m looking for:

Name  | Total | YTD  
-------------------
Item1 | 2     | 3
Item2 | 4     | 8

Answer 1

If you specify a column name for the COUNT function, it doesn’t count NULL values.

So, the simple way would be to use CASE statements to convert the values you don’t want counted to NULL

SELECT
    Name,
    COUNT(CASE
            WHEN Occurred_Date >= '2010-01-01' AND Occurred_Date < '2011-01-01'
                THEN Occurred_Date
            ELSE NULL
            END) AS [YTD]
    COUNT(CASE
            WHEN Occurred_Date >= '2010-06-01' AND Occurred_Date < '2011-07-01'
                THEN Occurred_Date
            ELSE NULL
            END) AS [MTD]
FROM Table1
GROUP BY Name

I’m not 100% certain the query engine will let you use CASE within COUNT (I’m not even sure what DB platform you’re using), but it gives you the idea. If this way doesn’t work, you can write the query using a derived table that will give you the same result.