merge mysql table in one table using php - php

Question

I've a mysql table named PRODOTTO structured in this way
+----+-----------+-------------+----------+--------+
| id | categoria | prodotto | quantita | prezzo |
+----+-----------+-------------+----------+--------+
| 1 | bar | Maxibon | 887 | 2.00 |
| 2 | bar | Limonata | 21 | 1.50 |
| 3 | bar | Coca Cola | 70 | 1.50 |
| 4 | bar | chupa chups | 30 | 0.60 |
| 5 | bar | pirulo | 79 | 1.00 |
+----+-----------+-------------+----------+--------+
and another one named CONSUMAZIONI
+----+----------+----------+--------+-----------------+--------+
| id | prodotto | quantita | prezzo | totale_parziale | status |
+----+----------+----------+--------+-----------------+--------+
| 1 | Maxibon | 1 | 2.00 | 2.00 | open |
| 2 | pirulo | 6 | 1.00 | 6.00 | open |
+----+----------+----------+--------+-----------------+--------+
I'd like to merge this to tables and obtain a unique table like this
+----+----------+----------+----------------------+--------+----------------+--------+
| id | prodotto | quantita | quantita_disponibile | prezzo | totale_parziale | status |
+----+----------+----------+----------------------+--------+-----------------+--------+
| 1 | Maxibon | 1 | 887 | 2.00 | 2.00 | open |
| 2 | pirulo | 6 | 79 | 1.00 | 6.00 | open |
+----+----------+----------+----------------------+--------+-----------------+--------+
So the new table is the combiantion fo the table CONSUMAZIONI and the column "quantita" of the prodotto's table.
On this new table I will do a query like this
SELECT * FROM...

Answer 1

Try this:
CREATE TABLE Fusione AS
(SELECT p.id,p.prodotto,c.quantita,p.quantita AS quantita_disponibile,p.prezzo,c.totale_parziale,c.status
FROM Prodotto P, Consumazione c
WHERE p.id=c.id
)
Also consider to restucture your schema, because you have redundancy in the two tables. Indeed, table Consumazioni should be a relation on table Prodotto. So Consumazioni should be someting like:
id_prodotto | quantità | status
The other information are available by joining the two tables and performing some basic mathematical operations on data (e.g., totale_parziale is prezzo*quatita).

Answer 2

What you can do in PHP, or rather in MySQL is Create a VIEW; so you don't always have to make a JOIN.
You can create a view for those tables, like the following:
CREATE VIEW prodConsumption AS
SELECT
p.prodotto, c.quantita, p.quantita AS quantita_disponibile, p.prezzo, c.totale_parziale, c.status
FROM
PRODOTTO p
INNER JOIN
CONSUMAZIONI c ON p.prodotto=c.prodotto
Ofcourse, you should look into your table, joining by name is horrible, and your IDs doesn't seem to match.
Afterwards, you can do as you wanted:
SELECT * FROM prodConsumption

Answer 3

You can create a VIEW for this:
CREATE VIEW view_prodotto_consumazinoni AS
SELECT
c.id AS id,
c.prodotto AS prodotto,
c.quantita AS quantita,
p.quantita AS quantita_disponibile,
c.prezzo AS prezzo,
c.totale_parziale AS totale_parziale,
c.status AS `status`
FROM consumazinoni c INNER JOIN prodotto p ON c.prodotto=p.prodotto;
This procudes exactly the output you want:
SELECT * FROM view_prodotto_consumazinoni;
id prodotto quantita quantita_disponibile prezzo totale_parziale status
1 Maxibon 1 887 2 2 open
2 pirulo 6 79 1 6 open
The advantage of such a VIEW is that you can define it once and then use it just like an ordinary table without having to think about the JOIN done all the time. It is synchronized with the changing data in the two base tables, so always up to date.
I set up a sql fiddler for you, so that you can play around a bit:
http://sqlfiddle.com/#!9/76a43/1
Have fun!