MySQL insert on duplicate update for non-PRIMARY key

Question

I am little confused with insert on duplicate update query. I have MySQL table with structure like this:

• record_id (PRIMARY, UNIQUE)
• person_id (UNIQU

Answer 1

You need a query that check if exists any row with you record_id (or person_id). If exists update it, else insert new row

IF EXISTS (SELECT * FROM table.person WHERE record_id='SomeValue')
    UPDATE table.person 
    SET some_text='new_some_text', some_other_text='some_other_text' 
    WHERE record_id='old_record_id'
ELSE
    INSERT INTO table.person (record_id, person_id, some_text, some_other_text) 
    VALUES ('new_record_id', 'new_person_id', 'new_some_text', 'new_some_other_text')

Another better approach is

UPDATE table.person SET (...) WHERE person_id='SomeValue'
IF ROW_COUNT()=0
    INSERT INTO table.person (...) VALUES (...)