星型连接也支持雪花模式。
只有查询中包含满足以下要求的星型或雪花模式的表时,优化器才可以选择星型连接计划。
The optimizer can choose a star join plan only if a query involves tables from a star or snowflake schema that meets the following requirements.
它具有星形或雪花形的维数据库模式设计。
It has a star or snowflake-like dimensional database schema design.
多维数据集模型可以看作星形联结或雪花形联结模式的抽象。
The cube model can be seen as an abstraction of a star-join or snowflake-join schema.
他的模式预测,这些水分子群在花形的雪花转变为棱形雪花的温度,会改变大小,反之亦然。
His model predicts that these clusters will change size at the temperatures at which newly forming snow alters from flower mode to prism mode, and vice versa.
他的模式预测,这些水分子群在花形的雪花转变为棱形雪花的温度,会改变大小,反之亦然。
His model predicts that these clusters will change size at the temperatures at which newly forming snow alters from flower mode to prism mode, and vice versa.
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