STATISTICS IO 对比

结合前两个练习中示例查询的 STATISTICS IO 输出，您可以得出什么结论？

示例 1

Table 'Customers'. Scan count 1, logical reads 2, physical reads 0,....
Table 'Orders'. Scan count 2, logical reads 32, physical reads 0,...

示例 2

Table 'Customers'. Scan count 1, logical reads 2, physical reads 0,....
Table 'Orders'. Scan count 2, logical reads 16, physical reads 0,...