I am building an interface to connect tables and present information in Retool about used products we are selling on behalf of customers.
I have several tables that all relate back to a single product. The other tables are information on a process or status - ie, Sent for repair, Sold, Returned, seller paid out.
I am looking to get a table that gives a product history sorted by date. I can JOIN all the tables and get a single row of data but I am looking for a vertical table like:
+--+-----------+---------------+
|id|Date |Status |
+--+-----------+---------------+
| 1| 2020-01-01|Booked in |
+--+-----------+---------------+
| 1| 2020-01-04|Sent for repair|
+--+-----------+---------------+
| 1| 2020-02-10|Sold |
+--+-----------+---------------+
| 1| 2020-02-28|Returned |
+--+-----------+---------------+
The status column would be a CASE statement determined by the information that was present in which table.
At the moment its more like
+--+-----------+---------------+-----------+---------------+-----------+---------------+
|id|Date |Status |Date |Status |Date |Status |
+--+-----------+---------------+-----------+---------------+-----------+---------------+
| 1| 2020-01-01|Booked in | 2020-01-01|Booked in | 2020-01-04|Sent for repair|
+--+-----------+---------------+-----------+---------------+-----------+---------------+
So in summary, is there a way to join several tables Vertically based upon a single product ID.
I hope this all makes sense, if anything needs clarification, I will do my best.
Thanks in Advance
Relevent tables/data below:
CREATE DATABASE StackOverflow_test;
USE StackOverflow_test;
CREATE TABLE commission_sales
(
id INT AUTO_INCREMENT PRIMARY KEY,
customer_id INT,
created_at TIMESTAMP DEFAULT NOW(),
product VARCHAR(20)
);
CREATE TABLE sold_data
(
id INT AUTO_INCREMENT PRIMARY KEY,
comm_no INT,
final_price DECIMAL(8,2),
sale_date DATE,
sale_ref VARCHAR(20),
created_at TIMESTAMP DEFAULT NOW(),
FOREIGN KEY (comm_no)
REFERENCES commission_sales(id)
);
CREATE TABLE returned_from_buyer
(
id INT AUTO_INCREMENT PRIMARY KEY,
comm_no INT,
returned_date DATE,
returned_notes VARCHAR(255),
FOREIGN KEY (comm_no)
REFERENCES commission_sales(id)
);
CREATE TABLE returned_to_seller
(
id INT AUTO_INCREMENT PRIMARY KEY,
comm_no INT,
returned_date DATE,
returned_notes VARCHAR(255),
FOREIGN KEY (comm_no)
REFERENCES commission_sales(id)
);
CREATE TABLE additional_charges
(
id INT AUTO_INCREMENT PRIMARY KEY,
comm_no INT,
amount DECIMAL(8,2),
notes VARCHAR(250),
paid BOOL DEFAULT 0,
created_at TIMESTAMP DEFAULT NOW(),
FOREIGN KEY (comm_no)
REFERENCES commission_sales(id)
);
And some Fake Data:
INSERT INTO commission_sales
(id,customer_id,product,created_at)
VALUES (1,72,"Teddy Bear","2020-12-10")
;
INSERT INTO sold_data
(comm_no,final_price,sale_date,sale_ref)
VALUES (1,25.99,"2020-12-15","AGRJOWKO")
;
INSERT INTO returned_from_buyer
(comm_no,returned_date,returned_notes)
VALUES (1,"2020-12-29","Broken")
;
INSERT INTO returned_to_seller
(comm_no,returned_date,returned_notes)
VALUES (1,"2021-01-30","Customer is Idiot")
;
INSERT INTO additional_charges
(comm_no,amount,notes,paid,created_at)
VALUES (1,10,"repair",0,"2021-01-05")
;
A basic JOIN puts all the data on one row, but I want the data displayed vertically:
SELECT * FROM commission_sales
JOIN sold_data ON commission_sales.id = sold_data.comm_no
JOIN additional_charges ON commission_sales.id = additional_charges.comm_no
JOIN returned_from_buyer ON commission_sales.id = returned_from_buyer.comm_no
JOIN Returned_to_seller ON commission_sales.id = returned_to_seller.comm_no
;
I believe you should create a VIEW called actions
like this.
CREATE OR REPLACE VIEW actions AS
SELECT commission_sales.id,
returned_from_buyer.returned_date date,
'returned_from_buyer' action,
returned_from_buyer.returned_notes notes
FROM commission_sales
JOIN returned_from_buyer ON commission_sales.id = returned_from_buyer.comm_no
UNION ALL
SELECT commission_sales.id,
returned_to_seller.returned_date date,
'returned_to_seller' action,
returned_to_seller.returned_notes notes
FROM commission_sales
JOIN returned_to_seller ON commission_sales.id = returned_to_seller.comm_no
UNION ALL
SELECT commission_sales.id,
additional_charges.created_at date,
'additional_charges' action,
additional_charges.notes notes
FROM commission_sales
JOIN additional_charges ON commission_sales.id = additional_charges.comm_no ;
This view with UNION ALL operations in it is a sort of typecasting operation. It extracts the data from those three tables and puts them into a common format. Think of the VIEW as a virtual table.
Then you can retrieve your data from it like this.
SELECT * FROM actions ORDER BY id, date;
Or you can join it to other tables in your system. Here is a fiddle.