MySQL Update Inner Join tables query

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I have no idea what the problem is. Using MySQL 5.0 I get a compile error when attempting to run the following MySQL update query:

UPDATE  b
SET b.mapx = g.latitude,
    b.mapy = g.longitude
FROM business AS b
INNER JOIN business_geocode g ON b.business_id = g.business_id
WHERE (b.mapx = '' OR b.mapx = 0) AND
      g.latitude > 0

All the field names are correct. Any thoughts?

3 Answers
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