相关疑难解决方法(0)

在显式vs隐式内连接中是否存在效率差异？例如:

SELECT * FROM
table a INNER JOIN table b
ON a.id = b.id;

与

SELECT a.*, b.*
FROM table a, table b
WHERE a.id = b.id;

SELECT 
  tb1.booking_ref, tb1.investor, tb2.cost, tb3.product 
FROM 
  tb1, tb3 LEFT JOIN tb2 
ON
  tb1.booking_ref = tb2.booking_ref 
AND 
  tb1.investor = tb2.investor 
AND 
  tb1.investor = '12345'
WHERE
  tb1.location = tb3.location

上面的查询错误是因为对tb3的引用 - 没有它们就很好用.

有谁有任何想法？