MySQL UNION - Replicating a Sub Query - mysql

Question

This is my current query:
Select Month as ReqMonth1,
sum(TotalUsage) As ReqCount1,
sum(Memberbase) as Club_updates_Records1,
round(sum(TotalUsage)/sum(Memberbase)*100,0) AS UsagePerc
from(
Select * from (
SELECT
CAST(DATE_FORMAT(Log_Date, '%b-%y') AS CHAR(100)) AS 'Month',
CAST(DATE_FORMAT(Log_Date, '%y-%m') AS CHAR(100)) AS 'Monthsort',
count(Requests.`fk_Members_ID`) AS TotalUsage,
0 as Memberbase
FROM
`Requests` Requests INNER JOIN `Members` Members ON Requests.`fk_Members_ID` = Members.`ID`
WHERE
cast(Requests.`Log_date` as date) BETWEEN date_sub(if($P{StartDate}>'2016-06-01',$P{StartDate},'2016-05-01'), Interval 4 month) and $P{EndDate} AND $P{EndDate}
AND Members.`Club` = $P{Club}
GROUP BY
CAST(DATE_FORMAT(Log_Date, '%M-%y') AS CHAR(100)) ) as A
UNION ALL
Select * from (
SELECT
CAST(DATE_FORMAT(Club_updates.`Update_Date`, '%b-%y') AS CHAR(100)) AS 'Month',
CAST(DATE_FORMAT(Club_updates.`Update_Date`, '%y-%m') AS CHAR(100)) AS 'Monthsort',
0 AS TotalUsage,
ifnull(max(Club_updates.`Records`),1) AS MemberBase
FROM
`Club updates` Club_updates
WHERE
cast(Club_updates.`Update_Date` as date) BETWEEN date_sub(if($P{StartDate}>'2016-06-01',$P{StartDate},'2016-05-01'), Interval 4 month) and $P{EndDate} AND $P{EndDate}
AND Club_updates.`fk_Club` = $P{Club}
GROUP BY CAST(DATE_FORMAT(Club_updates.`Update_Date`, '%M-%y') AS CHAR(100)) ) As B) as D
group by Month
Order by MonthSort
I'm trying to replicate/add another sub query "A" with the change on the Close_Date field instead of the Log_Date field in the WHERE clause.
Basically resulting a sum of both subqueries only in the "ReqCount1" field.
Any help would be appreciated.

Answer 1

Ok, got it solved
here's the solution(with an additional condition in the WHERE clause)
Select Month as ReqMonth1,
sum(TotalUsage) As ReqCount1,
sum(Memberbase) as Club_updates_Records1,
round(sum(TotalUsage)/sum(Memberbase)*100,0) AS UsagePerc
from(
Select * from (
SELECT
CAST(DATE_FORMAT(Log_Date, '%b-%y') AS CHAR(100)) AS 'Month',
CAST(DATE_FORMAT(Log_Date, '%y-%m') AS CHAR(100)) AS 'Monthsort',
count(Requests.`fk_Members_ID`) AS TotalUsage,
0 as Memberbase
FROM
`Requests` Requests INNER JOIN `Members` Members ON Requests.`fk_Members_ID` = Members.`ID`
WHERE
cast(Requests.`Log_date` as date) BETWEEN date_sub(if($P{StartDate}>'2016-06-01',$P{StartDate},'2016-05-01'), Interval 4 month) and $P{EndDate} AND $P{EndDate}
AND Members.`Club` = $P{Club} AND Requests.`Request_Type` <> 7
GROUP BY
CAST(DATE_FORMAT(Log_Date, '%M-%y') AS CHAR(100)) ) as A
UNION ALL
Select * from (
SELECT
CAST(DATE_FORMAT(Close_Date, '%b-%y') AS CHAR(100)) AS 'Month',
CAST(DATE_FORMAT(Close_Date, '%y-%m') AS CHAR(100)) AS 'Monthsort',
count(Requests.`fk_Members_ID`) AS TotalUsage,
0 as Memberbase
FROM
`Requests` Requests INNER JOIN `Members` Members ON Requests.`fk_Members_ID` = Members.`ID`
WHERE
cast(Requests.`Close_Date` as date) BETWEEN date_sub(if($P{StartDate}>'2016-06-01',$P{StartDate},'2016-05-01'), Interval 4 month) and $P{EndDate} AND $P{EndDate}
AND Members.`Club` = $P{Club} AND Requests.`Request_Type` = 7
GROUP BY
CAST(DATE_FORMAT(Close_Date, '%M-%y') AS CHAR(100)) ) as G
UNION ALL
Select * from (
SELECT
CAST(DATE_FORMAT(Club_updates.`Update_Date`, '%b-%y') AS CHAR(100)) AS 'Month',
CAST(DATE_FORMAT(Club_updates.`Update_Date`, '%y-%m') AS CHAR(100)) AS 'Monthsort',
0 AS TotalUsage,
ifnull(max(Club_updates.`Records`),1) AS MemberBase
FROM
`Club updates` Club_updates
WHERE
cast(Club_updates.`Update_Date` as date) BETWEEN date_sub(if($P{StartDate}>'2016-06-01',$P{StartDate},'2016-05-01'), Interval 4 month) and $P{EndDate} AND $P{EndDate}
AND Club_updates.`fk_Club` = $P{Club}
GROUP BY CAST(DATE_FORMAT(Club_updates.`Update_Date`, '%M-%y') AS CHAR(100)) ) As B) as D
group by Month
Order by MonthSort