Select 2 Column with Different Conditions - mysql

Question

I need to create a query that give me completed and unpaid transaction in 2019 grouped weekly. I already create the query to generate the completed transaction, but I stuck when try to combine the unpaid transaction query into the completed transaction query
This is the query for completed transaction
SELECT WEEK(A.plat_create_time, 1) AS 'Week Create Time',
COUNT(t1.lp_sign_time) AS 'Completed Order'
FROM deli_order A
LEFT JOIN
(
SELECT order_code, code, lp_sign_time
FROM pg_send_package
UNION
SELECT D.order_code, D.oms_code, C.cm_sign_time
FROM pg_package C
INNER JOIN pg_order D ON C.pg_order_id = D.id
) t1 ON t1.order_code = A.order_code
AND t1.code = A.code
AND YEAR(A.plat_create_time) = 2019
WHERE (YEAR(A.plat_create_time) = 2019) AND A.status = 6 AND t1.lp_sign_time IS NOT NULL
GROUP BY WEEK(A.plat_create_time, 1);
And its generate something like this
Week | Completed Order
1 886
2 734
3 868
4 1000
And this is the query that I already try to generate both completed and unpaid transaction
SELECT WEEK(A.plat_create_time, 1) AS 'Week Create Time',
COUNT(t1.lp_sign_time) AS 'Completed Order',
COUNT(t2.plat_create_time) AS 'Unpaid Order'
FROM deli_order A
LEFT JOIN
(
SELECT order_code, code, lp_sign_time
FROM pg_send_package
UNION
SELECT D.order_code, D.oms_code, C.cm_sign_time
FROM pg_package C
INNER JOIN pg_order D ON C.pg_order_id = D.id
) t1 ON t1.order_code = A.order_code
AND t1.code = A.code
AND YEAR(A.plat_create_time) = 2019
LEFT JOIN
(
SELECT order_code, WEEK(plat_create_time,1) AS 'Create Time'
FROM deli_order
WHERE pay_state = 0 AND (YEAR(plat_create_time) = 2019)
) t2 ON t2.order_code = A.order_code
WHERE (YEAR(A.plat_create_time) = 2019) AND A.status = 6 AND t1.lp_sign_time IS NOT NULL
GROUP BY WEEK(A.plat_create_time, 1);
but when I execute it, MySQL always give error message 'Unknown column 't2.plat_create_time' in field list'. My expected result is something like this
Week | Completed Order | Unpaid Order
1 886 51
2 734 42
3 868 40
4 1000 31
What should I change in my query?

Answer 1

Change:
SELECT order_code, WEEK(plat_create_time,1) AS 'Create Time'
to:
SELECT order_code, WEEK(plat_create_time,1) AS 'Create Time', plat_create_time