filter factor

常見例句

The filter factor indicates how selective the predicate is.
過(guò)濾因子表示謂詞的選擇性有多強(qiáng)。
For SQL statements with variables, the optimizer uses a default filter factor to determine the best access path at bind time.
對(duì)於帶變量的 SQL 語(yǔ)句，優(yōu)化器會(huì)使用一個(gè)默認(rèn)過(guò)濾因子在綁定時(shí)確定最佳訪問(wèn)路逕。
The filter factor is a number between 0 and 1 that estimates the proportion of rows in a table for which the predicate is true.
過(guò)濾因子是 0 到 1 之間的一個(gè)數(shù)值，它用來(lái)評(píng)估表中謂詞爲(wèi)真的行所佔(zhàn)的比例。