chap14_9.html
来自「Oracle资料大集合」· HTML 代码 · 共 291 行
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Some queries against this structure require extremely long processing times. How can I improve Oracle8抯 performance for queries against my data warehouse?<p><B>Technique</B><p>The classical data warehouse structure features one large table, called a fact table, where quantitative and categorical data for an ongoing business process resides. In most data warehouse implementations, this table is very large. Supplementing the fact table are several much smaller dimension tables, which store additional data about the grouping variables residing in the fact table. Entity relationship diagrams for a structure like this often surround the large fact table with the smaller dimension tables in a star pattern. The name 搒tar schema⌨️ 快捷键说明
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