Question

I have two tables (art and artlocation) that have three columns (series, style and location) in common. What I want to do is determine if all three fields are an exact match in BOTH tables then UPDATE one of the tables (as a foreign key) with the primary key of the other.

This is the query that I ran to determine if there is a match:

SELECT * FROM 'artlocation'  
  JOIN 'art' ON artlocation.series = art.series
  WHERE artlocation.style = art.style
    AND artlocation.location = art.location;

What I want to do is get the primary key from any match from the “artlocation” table and update the “art” table foreign key field. BUT I cannot FIGURE this out 🙁

Please help… thanks in advance!!

Answer 1

If I understand your question, you want a multiple table UPDATE. You can use a JOIN in the table portion of the UPDATE

UPDATE art
  JOIN artlocation ON art.series = artlocation.series 
                  AND art.style = artlocation.style 
                  AND art.location = artlocation.location
  SET art.location = artlocation.id