Query execution was interrupted, error #1317

Question

What I have is a table with a bunch of products (books, in this case). My point-of-sale system generates me a report that has the ISBN (unique product number) and perpetual

Answer 1

try to use INNER JOIN in the two tables like that

       UPDATE `inventory` 
       INNER JOIN `sales` 
       ON  `inventory`.`isbn` = `sales`.`isbn`
       SET `inventory`.`numbersold` = `sales`.`numbersold`