语句的

In this paper it analyzes the execution process of SQL statement in Oracle database and finds out that reducing times of SQL statement parsing and optimizing CBO are the emphases of SQL performance tuning.Then it validates the key role of using bound variable and cache cursor in enhancing performance of SQL with example.

从分析ORACLE数据库中SQL语句执行原理入手，指出减少SQL语句的解析次数和优化CBO是SQL性能优化的重点，并用实例验证了使用绑定变量和高速缓存游标在提高SQL性能方面的重要作用。

The optimization methods of database SQL query were studied and some available query optimization Methods were given out as follows: The incompatible data type should avoid to be used; More redundancy search parameters should be given as join condition in join query; In some condition, the number of note hitted to target was estimated by optimizing implement using the average density; Some other maths operating symbol should avoid to be used as condition parameters in WHERE clause; Some operating symbol and its sentence should avoid to be used also; When the cluster function was used,the WHERE clause should be paied attention to more,and so on.

作者单位：（重庆工学院商贸信息学院，重庆 400050）摘要：数据库SQL查询语句的优化，须注意：避免使用不兼容数据类型；连接查询中应多给连接条件提供一些冗余的搜索参数；某种条件下优化器只能使用其平均密度以估计命中的记录数；避免对WHERE子句中条件参数使用其它数学操作符；避免使用某些操作符及相应语句；聚簇函数的使用应注意WHERE子句。

The Engine partitions all the equations into sets according to the conditional statement in the models, whose value will be used to assemble the equations dynamically to describe the state of the system.

引擎根据模型中的条件语句，将方程分为若干集合，依靠条件语句的真值来动态组合方程集合，描述不同情况下系统的状态。

The 4th, the corrupt word that I say not corrupt word points to some people namely several keywords a few words are paratactic write together, for instance:, stand side by side the keyword so will write is unscientific, search engine may think you are to be in cogged, this kind writes a law, search engine 80% won't collect, so, must come to keyword thrust deep into the enemy forces to write in the statement, will write with the form of the statement.

第四， 不要贪词我所说的贪词就是指有些人把好几个关键词几个字并列写在一起，比如：，这样把关键词并列来写是不科学的，搜索引擎可能会认为你是在作弊，这种写法，搜索引擎80%不会收录，所以，一定要把关键词穿插在语句中来写，以语句的形式来写。

And the SC of a sentence is determined by it's eigen SB .

而一个语句的句类是由此语句中的特征语义块决定的。

A target occurring in a del statement is also considered bound for this purpose (though the actual semantics are to unbind the name).

del 语句的目标也是作为一个名字绑定出现的（虽然整条语句的功能是解除绑定）。

Assuming that sentence preferences for unbranded sentences reveals the product-level typicality, note that there is a sort of ceiling effect when brand and product-level typicality is the same (e.g., for Levi's, Gillette, and Xerox).

假定不具品牌语句的语句倾向性可以揭示产品水平的典型性，注意到有一种最高限度的影响，在品牌和产品水平典型性相同的时候。（例如李维斯，吉列和施乐） 5。

Unlike GCI, it takes more elusive forms in the specific context saliently represented by the prior utterance, and its inference is a multiplex combination of relevance, abductive and default reasoning, utterance context and rhetorical relations.

但与一般会话含义不同的是，特殊会话含义的具体表现形式灵活多样，对具体语境特别是先前语句的依赖性很强。而在推理机制上，关联、溯因推理、缺省推理、语句语境和话际关系等因素则共同作用，相互渗透。

If we expand the definition of grammars to QL ,add the produce expressions and adopt the LR syntax analysis, it can realize the semantic analysis of the complex QL.

如果扩充QL语句的文法定义，并且在语法分析阶段采用LR分析法，增加相应的产生式，可实现更加复杂的查询语句的语义分析。

For more powerful arguments of this point see Chomsky's appendix. On a still higher level, the level of immediate constituent, we find a similar phenomenon which is best illustrated by turning our attention to our understanding of sentences. Consider the first two words of the sentences

再更上一个阶层是为直接成份，我们也发现一个类似的现象，为了提供最好的解释办法，我们必须先把焦点在语句上，请注意下列语句的前面两个字

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。