查询词典 data type

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。

In the TX data type, the repeat delimiter can only be used to identify paragraph breaks.

TX 型数据中，重复分界符仅能用于识别段落分隔。

Dictionary and dynamic data type are important features of PostScript as a program design language.

词典和动态数据类型是PostScript作为一种程序设计语言的重要特征。

It is a case of the Entity Identifier data type (Section 2.8.13,"EI - Entity Identifier").

定义：本字段是与完成申请相关的医嘱号码，是一种实体识别数据类型(2.8.13 节 EI-实体识别符)。

According to above information, we can know the data type of input and output.

根据以上的资料，我们可以知道输入、输出数据的资料。

We need to deal with the problem of resolving these data type issues.

我们需要处理的数据类型解决这些问题的问题。

This is a special data type that has a distinct

它是一种特殊的数据类型，在不同的数

An abstract data type is defined by what you can do with it.

定义一个抽象数据类型的依据是能用它做什么。

That means that a copy of the data type is duplicated, and passed to the function.

这意味着一个复制的数据类型被拷贝出来了，即传递到一个函数。

Once we are done with all input parameters we need to define the data type of the output.

一旦我们完成所有的输入参数，我们需要定义输出的数据类型。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。