The derived table is constructed as follows.
派生表的构造方法如下。
These sub queries are called derived tables or table expressions.
这些子查询被称作派生表或表表达式。
One more thing to watch for is the fact derived table is going to be materialized even to execute EXPLAIN statement.
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。
Values for the ID column of the ACCTPROFILE table are derived from the first field in the input file.
ACCTPROFILE表i d列的值是从输入文件的第一个字段派生出来的。
After that, we need edit TARGET_ITEMID parameter, setting the parameter's value so that it is derived from the top level WI_ITEMID column table.
在此之后，我们需要编辑TARGET _ ITEMID参数，设置参数的值，这样就可以从顶级层次wi_itemid列表格中获得该参数的值。
The table has a row change timestamp column: a row change TOKEN expression returns a BIGINT value derived from the timestamp value in the column.
表具有一个行修改时间戳列：ROWCHANGETOKEN表达式返回一个从列的时间戳值获得的bigint值。
Whether derived from address information, acquired by GPS devices, or otherwise generated, many databases contain geographic coordinates of point locations as separate numeric columns in a table.
无论是从地址信息中推导出来的、由GPS设备获得的还是以其他方式生成的，许多数据库都包含点位置的地理坐标，这些信息在数据库中保存为单独的数字列。
Table 5 shows some of the derived data types on Linux that are different from those on Solaris.
表5给出了Linux上与Solaris上不同的一些派生数据类型。
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.
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。
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.
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。
HASH_LOOKUP, a function that determines the destination column value from a lookup table according to a value derived from a source column.
HASH_LOOKUP，该函数根据源列派生的值来确定查找表的目标列值。
Since the name of the table class is derived from the name of the application handler, this is not too difficult.
因为表类的名称源于应用处理程序的名称，所以这并不太难。
The data that is contained in an MQT is derived from one or more tables on which the materialized query table definition is based.
包含在物化查询表中的数据来自定义物化查询表时所基于的一个或多个表。
The accompanying table is derived from Admiralty statistics for 1914 and 1928.
附表是海军部在1914 ~ 1928年期间的统计数据。
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.
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。
You can think of a hash table conceptually as a series of buckets, each with an address that is derived form the key value by applying the hash function.
可以在概念上将哈希表认为是一系列的bucket，每个 bucket 所拥有的地址是通过应用哈希函数从键值导出的。
Each row has a colored percentage; the percentage is derived via the ratio of the number on this row and the one under it. Table 1 shows what the Numbers indicate, starting at the top.
每行包含一个彩色的百分数；这个百分数是这一行上的数字和下一行上的数字的比值。
Average cloud cover derived from local weather records (Table 17) is a discouraging 61%, one of the best in China, but is high compared to cloud amounts at recent eclipses in other parts of the globe.
从当地气象记录(表17)得到的平均云遮比是令人沮丧的61%，虽然是中国最好的一个，但却是过去几次世界其他地方的日食中比较高的云量。
The row keys of the Articles table are derived from the DOI of the article.
articles表的行键源自文章的DOI。
The table that follows, our S&P 500 Target Analysis, shows how we have derived our 12-month forward price objective for the S&P 500 in the context of the expected returns of our valuation models.
下文的图表，即我们的《标准----普尔500目标分析》，表明了我们在我们各种价值化模型的预期利润范围内，为标准----普尔500推算我们12个月期货价格目标的过程。
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.
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。
Also it shows that the causal strength of the causal network model can be derived from the information table by utilizing rough set theory.
此外，为便于因果网络的建立导出了因果连接强度的粗集表达式。
Population in this table is derived from the datum of Household registration.
本表人口数为户籍统计数。
Objective To determine the persistence of immune protection of China-made, plasma-derived hepatitis B vaccine in infants and the time table of booster immunization.
目的确定国产乙肝血源疫苗低剂量免疫保护持久性及用重组酵母乙肝疫苗加强免疫的免疫应答。
In single-table inheritance, there is a single database table that contains columns for both base and derived classes.
在单表继承中，一个数据库表同时包含基类和派生类的列。
If you inherit with virtual, instead there is a table of offsets that say where the base instance is relative to the derived object.
如果你继承virtual的补偿，而不是有一张桌子说，基础是相对于派生的对象实例。
When overridden in a derived class, serves as a hash function for hashing algorithms and data structures, such as a hash table.
在衍生类别中覆写时，做为杂凑演算法和资料结构之指定物件的杂凑函式，例如杂凑表。
Single form site index table was constructed after derived curve was expanded by differential method.
用差分法展开导向曲线，编制了单形立地指数表。
The concept of Geochemical Field of the elements is derived from the point mentioned above and the locations of the elements in the periodic table.
据此并结合元素在周期表中的位置，得出了元素地球化学场的概念。
Also it shows that the causal strength of the causal network model can be derived from the information table by...
此外，为便于因果网络的建立导出了因果连接强度的粗集表达式。
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