direct indexing meaning in English

直接变址
直接分度法

And deptno should be listed second , allowing db2 to do a direct index lookup on the first column empno and then a scan on the second deptno for the greater - than
然后列出deptno ，从而允许db2对第一列（ empno ）执行直接索引查找，然后针对大于号扫描第二列（ deptno ）。
The method of memory data management is proposed for the data model been presented . multilayer index with groups , direct index with local id and temp index is used for all kinds of efficient query
针对该工程模型，提出了内存数据管理方法，建立了多层分组索引、基于局部id的直接索引和临时索引，以满足各种高效查询的需要。
Under the condition of new times , chemical enterprises are faced with the difficulty of participating in international competition , and the most direct index of this difficulty is the competitive ability of enterprise ' s foreign trade for their products and service
在新的时代条件下，中国成功的加入了世贸组织，化工企业参与国际竞争的难度进一步加大，而衡量化工企业参与国际竞争的难度的一个最直接的指标就是化工企业产品和服务的外贸竞争力。