UPDATE table1
LEFT JOIN table2 ON table1.xx=table2.xx (关联的字段)
SET table1.xx=value,table2.xx=value (update value)
WHERE table1.xx=xx (条件)
UPDATE table1
LEFT JOIN table2 ON table1.xx=table2.xx (关联的字段)
SET table1.xx=value,table2.xx=value (update value)
WHERE table1.xx=xx (条件)