| 1. | Creates a global query . for more information , see
有关更多信息，请参见 |
| 2. | How to : add global queries to a dataset
>如何：向数据集添加全局查询 |
| 3. | To add a global query to a dataset
向数据集添加全局查询 |
| 4. | Global queries are sql queries that return either a single scalar value or no value
“全局查询”是返回单个（标量）值或不返回任何值的sql查询。 |
| 5. | You add global queries by running the tableadapter query configuration wizard from within the
可以通过从“数据集设计器”运行“ tableadapter查询配置向导”添加全局查询。 |
| 6. | The ability to aggregate arbitrary numbers of such wsdl rdf descriptions into a database , and do global queries is one immediate benefit of this rdf mapping for developers
对于开发者来说，这一rdf映射的直接好处在于能够把任意数目的这类wsdl / rdf描述聚集到数据库并进行全局查询。 |
| 7. | A kind global query language is defined to query multi - data source , then the result is loaded into wrapper of object . according to the keys which have been defined by client , the data matching is done , so client get the result from heterogeneous source
通过自定义的全局sql语句，可以完成对多个数据源的查询操作，查询结果装载入自定义的对象包装器，按照已定义好的关键字进行各数据源之间的匹配工作，由此实现了异种表之间的互连查询。 |
| 8. | This article concentrates on how to optimize the global query at an upper level : database - level distribution . based on statistical methods , the optimizing algorithm try to find a light - loaded server that can process the query with less cost . in fact , it uses the historical records of previous execution
它从查询执行的效果出发，通过统计的方式，不断从最近的查询执行代价学习纠正最近查询执行的统计代价，为查询的全局处理提供参考，以达到优化执行、提高执行效率和速度的目的。 |
| 9. | In this thesis , schema integration global query decomposition and optimization and global transactions manipulation in multidatabase systems are discoursed elaboratly . the algorithm which clears up one - to - one entity conflict and query process optimization algorithm are presented and analysiz . ed . the assurance strategy of transaction atomity and global deadlock resolution algorithm are also discussed in this thesis . at end of this thesis , based on domestic experiences and overseas experiences , a new multidatabase system model is presented by combining multidatabase system and corba technology , and security management mechanism is introduced in this model
本文对多数据库系统中模式集成、全局查询的分解和优化以及全局事务的处理等问题进行了详细而深入的论述，给出了一对一实体冲突的消解算法和查询处理优化算法，并对这些算法进行了分析；同时还论述了事务原子性的保证策略和全局死锁的处理算法。最后，本文在借鉴国内外经验的基础上，把通用对象请求代理结构技术与多数据库系统结合起来，提出了一个新的多数据库系统模型，在该模型中引入了安全管理机制。 |
