例句與造句

1. Reverse key index cannot be used for range scan
   回復：建了反向索引，為什么系統(tǒng)不使用索引了？
2. Current reversing key
   電流換向開關
3. In a quick test on a table with 100 , 000 rows loaded using a sequence , a normal index was used for most queries returning up to 30 rows , as was the reverse key index , however , when the number of rows went up to 1 , 000 , 000 the reverse key index was never used and a full table scan was used every time
   在一個用一個序列載入并含100 , 000行的表上做一個快速的測試，分別用普通索引和逆序索引查詢并返回30行數(shù)據(jù)，當行數(shù)增長到1 , 000 , 000 ，將不再使用逆序索引而是每次使用全表掃描。
4. It's difficult to find reversed keying in a sentence. 用reversed keying造句挺難的