How to bulk update mysql data with one query?

Question

$query = mysql_query(\"UPDATE a SET fruit = \'**apple**\' WHERE id = \'**1**\' \");
$query2 = mysql_query(\"UPDATE a SET fruit = \'**orange**\' WHERE id = \'**2**\'          


        

Answer 1

I found a following solution:

INSERT into `table` (id,fruit)
    VALUES (1,'apple'), (2,'orange'), (3,'peach')
    ON DUPLICATE KEY UPDATE fruit = VALUES(fruit);

Id must be unique or primary key. But don't know about performance.