Single Level Ordered Index 有序索引
Lateral Ordered Index 侧向有序指数
Ordered Data Variability Index 有序数据可变索引
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.
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。
Because the NPSI is a single ordered list, it is easy to see how DB2 could just toggle back and forth, index to table, index to table, and return rows in ZIPCODE order without sorting.
因为NPSI是一个单序列列表，很容易看到DB 2如何来回切换，从表到索引、索引到表，然后以ZIPCODE次序返回行，而不需要排序。
When China’s demand for raw materials surged, sending the Baltic Dry Index soaring to 11, 793 in 2008, shippers ordered many more ships.
中国对原材料的需求急剧增加时，波罗的海干货指数（Baltic Dry Index）在2008年飙升至11793点。 船务公司订购很多艘船。
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