MySQL formatting results based on table name and multiple table data - php

Question

I am coming into this project and have a little MySQL background to do basic SELECTs and INSERTs and whatnot. But, this is making me beat my head against the wall.
I have a typical user information table in MySQL:
USERS
+-------+----------+---------+-----+
|user_id|first_name|last_name|email|
+-------+----------+---------+-----+
1 tim jones tj#acme.com
2 sarah peteres sp#acme.com
3 larry doe ld#acme.com
Then I have multiple product tables:
PRODUCTS_ONE
+-------+-------+---------+----------+--------------+
|prod_id|user_id|prod_name|prod_width|prod_ship_date|
+-------+-------+---------+----------+--------------+
1 1 bowl nine 1-1-16
2 1 fork one 1-2-16
3 2 plate eleven 1-3-16
PRODUCTS_TWO
+-------+-------+----------+--------+--------------+
|prod_id|user_id|prod_state|prod_job|prod_ship_date|
+-------+-------+----------+--------+--------------+
1 3 maine min 1-1-16
2 2 texas max 1-2-16
3 1 ohio min 1-1-16
I have 15 total PRODUCT tables that all have prod_id, users_id, and prod_ship_date. The other fields might all be different based on what product table they are in. But, all the different PRODUCT tables have those three common fields.
What I am trying to accomplish is to get a list of USER info and PRODUCT info for products that match a certain ship date.
I want to find all the users and what product table and product id they are getting on a certain date.
So, if I searched on a ship date of 1-1-16, I would get something like:
+----------------+-----------+-------------+-----------+
|users.first_name|users.email|product_table|products_id|
+----------------+-----------+-------------+-----------+
tim tj#acme.com one,two 1,3
larry ld#acme.com one 3
If I searched on a ship date of 1-2-16, I would get something like:
+----------------+-----------+-------------+-----------+
|users.first_name|users.email|product_table|products_id|
+----------------+-----------+-------------+-----------+
tim tj#acme.com one 2
sarah sp#acme.com two 2
I hope this all makes sense. Unfortunately, I cannot change the structure or layout of the various product tables due to legacy issues.
I just can't figure out the MySQL statement to use to get something like this.
The above results will be used for reporting purposes.

Answer 1

you could write a query like this:
select first_name,email,prod_id,group_concat(product_table) as product_table from (
select u.user_id ,first_name,email,prod_id, 'one' as product_table from users u join products_one p on u.user_id = p.user_id where prod_ship_date = '2016-01-01 00:00:00'
union
select u.user_id,first_name,email,prod_id, 'two' as product_table from users u join products_two p on u.user_id = p.user_id where prod_ship_date = '2016-01-01 00:00:00'
) a
group by a.user_id
order by user_id,product_table
and so on.
With the second group concat and order by
select first_name,email,group_concat(prod_id),group_concat(product_table) as product_table from (
select u.user_id ,first_name,email,prod_id, 'one' as product_table from users u join products_one p on u.user_id = p.user_id where prod_ship_date = '2016-01-01 00:00:00'
union
select u.user_id,first_name,email,prod_id, 'two' as product_table from users u join products_two p on u.user_id = p.user_id where prod_ship_date = '2016-01-01 00:00:00'
) a
group by a.user_id
order by user_id,product_table
Check out this sqlfiddle