| 1. | Logical database design
逻辑数据库设计 |
| 2. | A poor logical database design can hinder the performance of the whole system
逻辑数据库设计不好，会影响整个系统的性能。 |
| 3. | Sometimes , the logical database design is already fixed and total redesign is not realistic
有时，逻辑数据库设计已经固定，全部进行重新设计是不现实的。 |
| 4. | A good logical database design can lay the foundation for optimal database and application performance
设计好逻辑数据库，可以为优化数据库和应用程序性能打下基础。 |
| 5. | Normalizing a logical database design involves using formal methods to separate the data into multiple , related tables
规范化逻辑数据库设计包括使用正规的方法来将数据分为多个相关的表。 |
| 6. | After normalizing your data model as far as you have intended during the logical database design process , then include some degree of de - normalization as one of the potential performance tuning options
在逻辑数据库设计过程中，您可以毫无保留地规范化数据模型，然后再加入一定程度的反规范化，作为潜在的性能调优的一种选择。 |
| 7. | Abstract : it treats the feasibility of improving the efficiency in processing logical data inquire on the part of parallel processing . it also puts forward a scheme of using the processor display to realize the parallel processing
文摘:从并行处理的角度探讨了提高逻辑数据库的查询处理效率的可行性，并提出一个使用处理机阵列来实现并行查询的方案.此方案适用于数据量大而规则集较为简单的系统 |
| 8. | Database partition expressions are typically used when defining containers of a tablespace across multiple logical database partitions of the same machine , to avoid having the same path device name used by more than one logical partition
当定义一个横跨同一台机器上多个逻辑数据库分区的表空间的容器时，为了避免一个以上的逻辑分区具有相同的路径/设备名称，通常使用数据库分区表达式（ database partition expression ） 。 |
| 9. | The thesis also analyzes how to optimize the performance of the whole distance education supporting platform based on sql server7 . 0 database , and emphasizes on the four aspects of logical database design , index usability , query structure and procedure objects . it also discusses the extension of system functions from the point of view of database design in order to realize the distance education quality appraisal and tracking in the future
对基于sqlserver7 . 0数据库的整个远程教育支撑平台系统的性能优化进行分析，着重从逻辑数据库设计、索引的可用性、查询结构和过程对象的使用四个方面进行论述，并从数据库设计角度讨论了对系统进行功能扩展，以实现未来对远程教育质量评价和教学质量跟踪。 |
