BAD FIELD ERROR in WHERE DATE CLAUSE for MySQL - mysql

Question

Why am I getting an error with the following code:
SELECT
Hour,
SUM( CASE col WHEN '1' THEN data ELSE 0 END ) AS 'Sun',
SUM( CASE col WHEN '2' THEN data ELSE 0 END ) AS 'Mon',
SUM( CASE col WHEN '3' THEN data ELSE 0 END ) AS 'Tues',
SUM( CASE col WHEN '4' THEN data ELSE 0 END ) AS 'Wed',
SUM( CASE col WHEN '5' THEN data ELSE 0 END ) AS 'Thur',
SUM( CASE col WHEN '6' THEN data ELSE 0 END ) AS 'Fri',
SUM( CASE col WHEN '7' THEN data ELSE 0 END ) AS 'Sat'
FROM (
SELECT
HOUR(arrPurch.PurchaseDate) as HOUR,
DAYOFWEEK(arrPurch.PurchaseDate) as col,
SUM(ROUND(arrPurch.Credits * 1.85 + arrPurch.Price,0)) AS Data
FROM praisecharts_main_new.arrangementPurchases AS arrPurch
INNER JOIN praisecharts_main_new.catalog_dev_arrangements
AS catDEVarr ON arrPurch.ArrangementID = catDEVarr.ArrangementID
INNER JOIN praisecharts_main_new.members
ON arrPurch.MemberID = members.MemberID
GROUP BY HOUR(arrPurch.PurchaseDate), DAYOFWEEK(arrPurch.PurchaseDate)
) AS stats
WHERE
Hour BETWEEN 0 AND 23
-- AND arrPurch.PurchaseDate BETWEEN (CURDATE() - INTERVAL 29 DAY)
-- AND (CURDATE() - INTERVAL 1 DAY)
-- AND arrPurch.PurchaseDate > (CURDATE() - INTERVAL 1 DAY)
GROUP BY Hour WITH ROLLUP
When I don't try to PIVOT the results with the CASE clauses, I don't get an error. Here is an example of a query that works:
SELECT
DAYOFWEEK(arrPurch.PurchaseDate) AS DayWeek,
FORMAT(SUM(arrPurch.Credits*1.85+arrPurch.Price)/4,0) AS `c.Rev`
FROM
praisecharts_main_new.arrangementPurchases AS arrPurch
INNER JOIN praisecharts_main_new.catalog_dev_arrangements AS catDEVarr ON
arrPurch.ArrangementID = catDEVarr.ArrangementID
INNER JOIN praisecharts_main_new.members
ON arrPurch.MemberID = members.MemberID
WHERE arrPurch.PurchaseDate BETWEEN (CURDATE() - INTERVAL 29 DAY)
AND (CURDATE() - INTERVAL 1 DAY)
GROUP BY DayWeek WITH ROLLUP;
LIMIT 14

Answer 1

I was able to find the answer. I moved the WHERE clause up to the embedded SELECT cause above, rather than at the bottom. Here is an example of the code that works.
SELECT
Hour,
SUM( CASE col WHEN '1' THEN data ELSE 0 END ) AS 'Sun',
SUM( CASE col WHEN '2' THEN data ELSE 0 END ) AS 'Mon',
SUM( CASE col WHEN '3' THEN data ELSE 0 END ) AS 'Tues',
SUM( CASE col WHEN '4' THEN data ELSE 0 END ) AS 'Wed',
SUM( CASE col WHEN '5' THEN data ELSE 0 END ) AS 'Thur',
SUM( CASE col WHEN '6' THEN data ELSE 0 END ) AS 'Fri',
SUM( CASE col WHEN '7' THEN data ELSE 0 END ) AS 'Sat'
FROM (
SELECT
HOUR(arrPurch.PurchaseDate) as HOUR,
DAYOFWEEK(arrPurch.PurchaseDate) as col,
SUM(ROUND((arrPurch.Credits * 1.85 + arrPurch.Price)/4,0)) AS data
FROM praisecharts_main_new.arrangementPurchases AS arrPurch
INNER JOIN praisecharts_main_new.catalog_dev_arrangements
AS catDEVarr ON arrPurch.ArrangementID = catDEVarr.ArrangementID
INNER JOIN praisecharts_main_new.members
ON arrPurch.MemberID = members.MemberID
WHERE arrPurch.PurchaseDate BETWEEN (CURDATE() - INTERVAL 29 DAY)
AND (CURDATE() - INTERVAL 1 DAY)
GROUP BY HOUR(arrPurch.PurchaseDate),
DAYOFWEEK(arrPurch.PurchaseDate)
) AS stats
WHERE
Hour BETWEEN 0 AND 23
GROUP BY Hour WITH ROLLUP