Mysql Join Union Query By Date - mysql

Question

I have 2 tables
and i want the result as this using join query. I don't have any Idea
Join Query By
TBL_SUCCESS_ORDER
------------------------
id | date | amount
-------------------------
1 | 2017-01-01 | 1000
2 | 2017-01-06 | 300
3 | 2017-01-29 | 50
4 | 2017-02-02 | 100
5 | 2017-02-16 | 400
6 | 2017-03-01 | 500
7 | 2017-04-03 | 1200
TBL_FAIL_ORDER
------------------------
id | date | amount
-------------------------
1 | 2017-01-03 | 400
2 | 2017-01-07 | 300
3 | 2017-01-24 | 50
4 | 2017-02-02 | 100
5 | 2017-04-07 | 200
RESULT
------------------------------------------------------------------
year | month | sum_of_succes_amount | sum_of_fail_amount | total
------------------------------------------------------------------
2017 | January | 1350 | 750 | 2100
2017 | Febuary | 500 | 100 | 600
2017 | March | 500 | 0 | 500
2017 | April | 1200 | 200 | 1400
I been stack for a whole week i did not get it . When i connect api json
TBL_PENDING_ORDER
------------------------
id | date | amount
-------------------------
1 | 2017-04-03 | 600
2 | 2017-05-07 | 600
RESULT
-----------------------------------------------------------------------------------------
year | month | sum_of_succes_amount | sum_of_fail_amount | sum_of_pending_amount |total
-----------------------------------------------------------------------------------------
2017 | January | 1350 | 750 | 0 | 2100
2017 | Febuary | 500 | 100 | 0 | 600
2017 | March | 500 | 0 | 0 | 500
2017 | April | 1200 | 200 | 600 | 2000
2017 | May | 0 | 0 | 600 | 600
What if I add The third table ? TBL_PENDING_ORDER

Answer 1

You can use the following solution using UNION ALL AND GROUP BY:
SELECT
YEAR(x.date),
MONTH(x.date),
SUM(CASE WHEN x.type = 'S' THEN amount ELSE 0 END) AS sum_of_succes_amount,
SUM(CASE WHEN x.type = 'F' THEN amount ELSE 0 END) AS sum_of_fail_amount,
SUM(amount) AS total
FROM (
SELECT id, date, amount, 'S' AS type FROM TBL_SUCCESS_ORDER
UNION ALL
SELECT id, date, amount, 'F' AS type FROM TBL_FAIL_ORDER
)x GROUP BY YEAR(x.date), MONTH(x.date)
You want to add the third table TBL_PENDING_ORDER?
SELECT
YEAR(x.date),
MONTH(x.date),
SUM(CASE WHEN x.type = 'S' THEN amount ELSE 0 END) AS sum_of_succes_amount,
SUM(CASE WHEN x.type = 'F' THEN amount ELSE 0 END) AS sum_of_fail_amount,
SUM(CASE WHEN x.type = 'P' THEN amount ELSE 0 END) AS sum_of_pending_amount,
SUM(amount) AS total
FROM (
SELECT id, date, amount, 'S' AS type FROM TBL_SUCCESS_ORDER
UNION ALL
SELECT id, date, amount, 'F' AS type FROM TBL_FAIL_ORDER
UNION ALL
SELECT id, date, amount, 'P' AS type FROM TBL_PENDING_ORDER
)x GROUP BY YEAR(x.date), MONTH(x.date)