To understand this behavior, you need to know how many SELECT statements were run and the number of times you had to read the next row in the table (rather than a direct access through an index).

要理解这种行为，需要知道运行了多少个select语句，以及需要读取表中的下一行数据的次数(而不是通过索引直接访问)。

youdao

To understand this behavior, you need to know how many SELECT statements were run and the number of times you had to read the next row in the table (rather than a direct access through an index).

要理解这种行为，需要知道运行了多少个select语句，以及需要读取表中的下一行数据的次数(而不是通过索引直接访问)。

youdao