reverse key造句
造句與例句
手機版
- 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？ - 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。 - It's difficult to see reverse key in a sentence. 用reverse key造句挺難的
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