reverse keys造句
例句與造句
- Reverse key index cannot be used for range scan
回復(fù):建了反向索引,為什么系統(tǒng)不使用索引了? - Current reversing key
電流換向開關(guān) - 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(gè)用一個(gè)序列載入并含100 , 000行的表上做一個(gè)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(dāng)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。 - It's difficult to find reverse keys in a sentence. 用reverse keys造句挺難的