• 索引也是DB 2对象(一个单独VSAM数据集),它排好组成,这些键是从相应中的多个抽取出来的。

    An index is a DB2 object (a separate VSAM dataset) that is comprised of an ordered set of keys extracted from one or more columns of the corresponding table.

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  • 如果索引表空间使用较大缓冲并且尽可能不同 insert以便排好的,而不是随机的,可以帮助加快索引维护

    You can help speed up index maintenance by using a large buffer pool for the index tablespace, and, if possible, ordering the inserts so that the key values are ordered, not random.

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  • 如果一个索引负值意味着是从列表末尾向前计数查找相对应位置。

    If an index has a negative value, it counts backward from the end of the list.

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  • 索引那些集合笛卡尔积的个集合上词典自身

    The lexicographical order on the Cartesian product of a set of totally ordered sets indexed by an ordinal, is itself a total order.

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  • 索引那些集合笛卡尔积的个集合上词典自身

    The lexicographical order on the Cartesian product of a set of totally ordered sets indexed by an ordinal, is itself a total order.

    youdao

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