Call it the "learning paradox": the more you struggle and even fail while you're trying to learn new information, the better you're likely to recall and apply that information later.
这就是所谓的“学习悖论”:在你尝试学习新知识的过程中,你越是痛苦挣扎甚至失败,你就越有可能在以后更好地回忆和应用这些知识。
The more inputs and statistical information collected, the better the algorithm will be at predicting a range of outcomes.
输入和收集的统计信息越多,算法就越能准确地预测一系列结果。
You can leverage the extended use of multi-column statistics in DB2 9.5 to provide the optimizer more information to better estimate the cardinality in order to choose an optimal query access plan.
您可以利用 DB2 9.5 中的多列统计信息的扩展用途来为优化器提供更多的信息,从而使优化器更好地估计基数,选择最佳的查询访问计划。
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