query set value with data from related table - php

Question

so, i have done a big mistake when i designing my table for salesreport that looks like this
+----+------------+--------------+-------+
| id | company_id | company_code | value |
+----+------------+--------------+-------+
| 1 | 0 | 67 | 100 |
| 2 | 0 | 55 | 200 |
+----+------------+--------------+-------+
i just recently notice it and add new column called company_id which is in the company table that looks like this
+----+--------------+------+
| id | company_code | name |
+----+--------------+------+
| 1 | 55 | XX |
| 2 | 67 | XA |
+----+--------------+------+
in the past i create relationship with company_code since i thought it will always unique but not auto increment, the code is created manually from company list in existing record.
i then realise that it will be better to create a relationship between table by using id so instead of using company_code it should be company_id on my salesreport table that pointing to id column in company table
and now there is more than a thousand record that already in mysql database that referencing relationship using company_code and i want to know is there one times mysql query that i can run to fix it?
and i come up with this kind of query
UPDATE salesreport SET company_id = '1' WHERE company_code = '67';
but i think since both tables company and salesreport already had a relationship why can't it just like this
UPDATE salesreport SET company_id = company.id WHERE company_code = company.company_code;
but i don't think it will be work, it needs more query to know that i selecting company table and then match salesreport.company_code with company.company_code and if it is match then set salesreport.company_id with company.id
well i think that is how it goes... but i have no idea what is the query to do just that.. so maybe someone can help me and provide a lazy-elegant solution to this.
thank you by the way.

Answer 1

Here is a solution to your request:
UPDATE salesreport
LEFT JOIN company ON company.company_code = salesreport.company_code
SET salesreport.company_id = company.id;
I have created a SQLFiddle for you to test the results: http://rextester.com/HNJ85353
Herу is a full test case:
CREATE TABLE IF NOT EXISTS p1929_salesreport (id INTEGER PRIMARY KEY AUTO_INCREMENT,
company_id INTEGER,
company_code INTEGER,
value INTEGER);
INSERT INTO p1929_salesreport (company_id, company_code, value) VALUES (0, 67, 100);
INSERT INTO p1929_salesreport (company_id, company_code, value) VALUES (0, 55, 200);
CREATE TABLE IF NOT EXISTS p1929_company (id INTEGER PRIMARY KEY AUTO_INCREMENT,
company_code INTEGER,
name TEXT);
INSERT INTO p1929_company (company_code, name) VALUES (55, "XX");
INSERT INTO p1929_company (company_code, name) VALUES (67, "XA");
/* before changes */
SELECT * FROM p1929_company;
SELECT * FROM p1929_salesreport;
/* actual query */
UPDATE p1929_salesreport
LEFT JOIN p1929_company ON p1929_company.company_code = p1929_salesreport.company_code
SET p1929_salesreport.company_id = p1929_company.id;
/* after changes */
SELECT * FROM p1929_salesreport;
DROP TABLE p1929_salesreport;
DROP TABLE p1929_company;

Answer 2

Update with a join to your other table
UPDATE salesreport s
LEFT JOIN company c on s.company_code = c.company_code
SET s.company_id = c.id;

Answer 3

You could update using an inner join eg:
UPDATE salesreport s
INNER JOIN company c ON s.company_code = c.company_code
set s.company_id = c.id

Answer 4

MERGE into salesreport S
USING(select id, company_code, name from Company) C
ON(S.company_code=C.company_code)
WHEN MATCHED THEN
UPDATE
SET S.company_id = C.id
you can try this. this will update Salesreport table using company table when both company code matches.