(题注) cross-reference (交叉引用) index and tables (索引和目录) clip art (剪贴画) from file (来自文件) from scanner or camera (来自扫描仪或照相机) organization chart (组织结构图) new ...
基于16个网页-相关网页
From the table space snapshot data, the used page objects can be used to tell the total size of the index, tables, and the total database size.
从表空间快照数据中可以看出,这些用过的页面对象可用于告知索引、表和数据库的总大小。
The optimizer will recognize this index and use the filters on the dimension tables to generate a list of valid combinations of the dimension tables' keys into a temp table.
该优化器将可以识别出这个索引,在维度表上使用过滤器来在一个临时表中生成一个维度表键的有效组合列表。
Correlated subqueries will greatly degrade the speed of data retrieval, especially for non-selective queries on huge tables with millions of rows and with no index.
相关子查询将极大地降低数据检索的速度,对于拥有几百万个行但没有索引的大型表的非选择性查询更是如此。
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