Update specific records of MySQL table

Question

I am dealing with phone system and have to work with multiple service vendors. For one vendor I have a MySQL table country_codes like this -

--         


        

Answer 1

You can create a table with countries only, i.e.:

INSERT INTO countries (country_code,country)
SELECT country_code,country FROM country_codes WHERE country_code=0

Then you can easily update your table

UPDATE country_codes cc, countries c
SET cc.country_code = c.country_code
WHERE LOCATE(c.country,cc.country)=1 AND cc.country_code=0

I haven't tested this, but I believe you can get the point.