对于收益决策类型的题目,一个有效的图表就是以时间为序,画出收入与成本序表。
A useful chart for declining profitability type of problems is to draw revenues and costs over time.
索引也是一种DB 2对象(一个单独的VSAM数据集),它由一组排好序的键组成,这些键是从相应表中的一个列或多个列抽取出来的。
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.
如果为索引表空间使用较大的缓冲池,并且尽可能地将不同 insert 排序,以便键值是排好序的,而不是随机的,就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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