column group的意思
column group中文翻譯:
“列”組
column───n.縱隊,列;專欄;圓柱,柱形物
fluted column───凹槽柱
column chromatography───柱層析(法),柱色譜(法);柱層析法;[分化]柱色譜法
buckling column───屈曲柱
remarks column───[計]備注欄
column heading───[計] 列標題,欄標題;[計]欄標題
in column───編隊
rectification column───[化] 精餾塔;[化工]精餾塔
chromatography column───[建] 色譜精煉柱;層析柱
Sometimes, column group, or like statistics options can be useful.───有時候,列組或類似的統計選項會很有用。
Column group Statistics obtains the number of distinct combinations of values for a group of columns.───列組(Column Group)統計信息將獲得一組列的不同值組合的數目。
RUNSTATS with column group statistics.───列組統計信息的runstats。
It is left as an exercise for you to determine the appropriate RUNSTATS statement to collect a column group statistic.───至于確定合適的RUNSTATS語句來收集列組統計信息,就留與您做練習。
Column Group Statistics obtains the number of distinct combinations of values for a group of columns.───列組(ColumnGroup)統計信息將獲得一組列的不同值組合的數目。
Chart values, also called value series or static series, are similar to a static row or column group in a matrix.───圖表值也稱為值序列或靜態序列,與矩陣中的靜態行組或靜態列組類似。
The product of individual column cardinalities is compared to the cardinality of the column group to get better correlation estimates.───較于列組的基數,單個列的基數(cardinality)的乘積將獲得更好的相關性估計。
The cardinality estimate is slightly higher than the actual value of 4 since the column group statistic is a uniform distribution statistic.───由于列組統計信息是一個均勻分布的統計信息,所以基數估計值比實際值4稍高了一些。
Column group statistics assume data is uniform; distribution statistics are not available yet on column groups.───列組統計信息假設數據是均勻分布的;但還無法獲得列組上的分布統計信息。
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