大家在查：问题及特·卡尔加 43.77 肯尼亚拉姆乔治·艾勒埃德娜·斯 CUST_STATE_TAX Towcester 18到25 silly twit

CUST_CODE

CUST_CODE

CUST_CODE

CUST_CODE

1

The last table in the join sequence , CUST_CUSTOMER, is also scanned through an index defined over the CUST_CODE column .

联接序列中的最后一个表是 CUST_CUSTOMER 表，其也是通过 CUST_CODE 列上已定义的索引进行扫描。

2

Also, in order to get better performance with index only access , you can also add CUST_CODE as a key column .

还有，为了获取只有列访问的更好的性能，应该将 CUST_CODE 作为关键列。

热词推荐

大家在看