DB2 优化器会利用这些预连接(pre-joined)和预聚合(pre-aggregated)的 MQT,重写输入的查询并将适当的 OLAP 查询转到适当的 MQT,从而显著加快查询的执行。
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The database may contain materialized query tables (MQTs), the pre-joined and pre-aggregated tables for DWE OLAP models and cubes.
数据库可以包含物化查询表(MQT),即用于 DWE OLAP 模型和多维数据集的预联结和预聚合的表。
"If SAP had had a pre-war history, I would never have joined the company," he says.
“如果SAP有战前的前科的话,我就不会加盟这个公司了”,他说。
France joined later but at a lower rate; high inflation had made the pre-war rate unrealistic.
法国接着也参与了进来,但它的兑换比例更低,因为高涨的通货膨胀率让战前的兑换比例变得太不现实。
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