How to query multiple SUMs of the same item using SQL in iReport

Question

• I\'m creating a JasperReport using iReport, and as such, I\'m limited* to one SQL query.

• I have a table \'statistics\', with a \'name\' (VARCHAR), \

Answer 1

UNION'd queries should produce the same columns (name, type). Set unused columns to NULL or use a differenciation column:

SELECT
     SUM(count) as `total`,
     'today' as `when`
FROM
     statistics
WHERE
     name = "test"
 AND $P{oneDayAgo} <= datetime
 AND datetime <= $P{now}
UNION
SELECT
     SUM(count) as `total`,
     'thisWeek' as `when`
FROM
     statistics
WHERE
     name = "test"
 AND $P{oneWeekAgo} <= datetime
 AND datetime <= $P{now}
UNION
SELECT
     SUM(count) as `total`,
     'thisMonth' as `when`
FROM
     statistics
WHERE
     name = "test"
 AND $P{oneMonthAgo} <= datetime
 AND datetime <= $P{now}