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it168
11 年
看完SQL Server 2014 Q/A:想不升级都难
SQL Server MDS 既支持根据数据关系属性自动生成层级关系 (derived hierarchy)也支持手动创建参差型层级 (Ragged Hierarchy)。 在有些场景,你甚至可以混合这两种方式 (“derived hierarchy with an explicit cap”),在最高层采用参差型层级,之下使用自动生成层级。
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