查询的from子句中的派生表。
派生表的构造方法如下。
这些子查询被称作派生表或表表达式。
These sub queries are called derived tables or table expressions.
没有外部表、远程表、视图或派生表。
No table is an external table, remote table, view, or derived table.
当目标表引用是一个派生表时，那么必须使用ACCESS元素。
The ACCESS element must be used when the target table reference is a derived table.
将由“业务部门”在数据架构师的帮助下从术语表中派生出逻辑业务信息模型。
From the glossary, a logical business information model is derived by "the business" in collaboration with data architects.
ACCTPROFILE表i d列的值是从输入文件的第一个字段派生出来的。
Values for the ID column of the ACCTPROFILE table are derived from the first field in the input file.
存储在Employee中的Person的各部分不会被“切掉”，而当定期SQL查询未能成功地将派生子类表加入到table -per - class模型中时，这种被“切掉”的现象就会发生。
The parts of Person that are stored in Employee aren't "sliced off," as can happen in a regular SQL query that fails to join every derived subclass table in a table-per-class model.
表5给出了Linux上与Solaris上不同的一些派生数据类型。
Table 5 shows some of the derived data types on Linux that are different from those on Solaris.
HASH_LOOKUP，该函数根据源列派生的值来确定查找表的目标列值。
HASH_LOOKUP, a function that determines the destination column value from a lookup table according to a value derived from a source column.
相反，如果花点时间确定对象模型中稳定的关系，那么可以用最小的代价派生出更稳定的词汇表。
In contrast, if you take a moment to identify the stable relationship in your object model, then you can derive a more stable vocabulary at minimal cost.
派生的uml模型也保留术语表分类。
具体而言，即研究UML建模在XML开发中的应用，特别是如何用 XSLT样式表实现自动派生。
More specifically, I am exploring the use of UML modeling for XML development and in particular how XSLT stylesheets can help through automatic derivation.
我编写一两个样式表从XMI文档(如uml模型)派生XML模式。
I write one or two stylesheets to derive the XML schema from the XMI document, for instance from the UML model.
示例：源和目标系统的定义、表和字段的结构和属性、用于审计派生和依赖关系的文档。
Examples: definition of source and target systems, their table and fields structures and attributes, documentation for auditing derivations and dependencies.
词干推导根据语法变化得出词汇表中已有单词的派生形式，包括动词的变化，比如write、wrote和written，或名词形式，比如mouse和mice。
Stem derivation finds derived forms of in-vocabulary words based on grammatical inflection, including verb conjugations such as write, wrote, and written, or noun forms such as mouse and mice.
在您的具体实现中，该字段可以被存储为PortalServer按用户喜好使用的关系数据库表的一部分，也可以从某种逻辑派生出来。
In your actual implementation, this field can be stored as part of the relational database table used by Portal Server for the user's preferences or it can be derived from some kind of logic.
使用表名比较简单，但是使用表标识符的功能更加强大，因为它可以指代一个派生的限定符，比如一个 “xmlexists”谓词。
The use of table names is simpler, but using table identifiers is a more powerful mechanism because it can refer to a derived quantifier, such as an 'xmlexists' predicate.
当您基于雪花型架构(在该架构中，维度属性派生自多个相关的表)定义维度时，会按如下方式自动定义属性关系。
When you define a dimension based on a snowflake schema, which is where dimension attributes are derived from multiple related tables, an attribute relationship is automatically defined as follows.
当在派生类中被重写时，用作指定对象的哈希算法和数据结构(如哈希表)的哈希函数。
When overridden in a derived class, serves as a hash function for the specified object for hashing algorithms and data structures, such as a hash table.
需要考虑的另一方面是，派生 表需要被显式 处理，尽管只是执行EXPLAIN语句。
One more thing to watch for is the fact derived table is going to be materialized even to execute EXPLAIN statement.
在单表继承中，一个数据库表同时包含基类和派生类的列。
In single-table inheritance, there is a single database table that contains columns for both base and derived classes.
正在使用的语言已在注册表中注册了一个设计器类，但该类并不是从正确的基类派生的。
The language in use has registered a designer class in the Registry that does not derive from the correct base class.
当在派生类中重写时，返回由表达式编辑器表属性值组成的表达式字符串。
When overridden in a derived class, returns the expression string that is formed by the expression editor sheet property values.
当在派生类中重写时，返回由表达式编辑器表属性值组成的表达式字符串。
When overridden in a derived class, returns the expression string that is formed by the expression editor sheet property values.
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