This occurs rarely and only when a query plan has multiple range scans 這種情況發(fā)生的幾率很小,僅當(dāng)查詢(xún)計(jì)劃具有多次范圍掃描時(shí)才會(huì)發(fā)生。
Anova and duncan ' s new multiple range test were used to detect if differences existed among suppliers ' attributes 并應(yīng)用單因子變異數(shù)分析及鄧肯氏新多變域檢定法,比較11項(xiàng)決定因素的差異。
To specify multiple ranges for the same character position , put them within the same brackets without delimiters 若要為同一個(gè)字符位置指定多個(gè)范圍,請(qǐng)將這些范圍放在沒(méi)有分隔符的同一對(duì)括號(hào)中。
If order by is required , eliminate the column that participates in the multiple range scans t . a in the example above from the order by clause 如果需要order by ,則通過(guò)order by子句清除參與多次范圍掃描的列(如上面示例中的t . a ) 。