Though the research of aggregation table, and applied the techniques in data mining of ROLAP, not only fully displayed ROLAP superiority, but also overcome its biggest weakness of inquiry efficiency.
文章通过对聚合表技术的研究和分析，把该技术应用于基于ROLAP的数据挖掘中，既充分发挥了RO - LAP方法的优势，又克服了其查询效率低的最大弱点。
Using SQL group by and aggregation functions on that table is usually more efficient than producing the same result in plain XQuery.
对该表使用SQL的groupby函数和聚集函数通常比使用生成相同结果的普通XQuery更有效。
Using SQL group by and aggregation functions on that table is usually more efficient than producing the same result in plain XQuery.
对该表使用SQL的groupby函数和聚集函数通常比使用生成相同结果的普通XQuery更有效。
应用推荐