Allowing too much free space, however, could cause extra pages to be read for queries and largely defeat the purpose of using a clustering index.
不过，如果允许太多自由空间的存在，则可能导致查询时需要读取额外的页，这反而大大违反了使用群集索引的本意。
Q: Why can't I specify a table space for my local index using the CREATE index statement?
Q：为什么我无法利用CREATEindex语句为我的本地索引指定表空间？
Using our method, the total color index information needs less storage space compared with the traditional color histogram.
使用该方法，总的颜色索引信息将比传统的颜色直方图节省存储空间。
QR-tree, a spatial index structure based on R-tree and a kind of space partition method using Quad-tree, is proposed. Its data structure and algorithms are also stated.
提出了一种基于R-树与“四叉树”空间层次划分的空间索引结构QR-树，给出了其数据结构和算法描述。
QR-tree, a spatial index structure based on R-tree and a kind of space partition method using Quad-tree, is proposed. Its data structure and algorithms are also stated.
提出了一种基于R-树与“四叉树”空间层次划分的空间索引结构QR-树，给出了其数据结构和算法描述。
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