The transformer carries out a lookup action in non-primary tables for records of the primary table.
对于主表的记录，转换器对非主表进行查找。
You can also establish a foreign key in a secondary table to link with a primary key in a primary table.
您还可以在次表中建立外键，以链接主表中的主键。
For a single record of the primary table, only one record will be retrieved from the non-primary tables.
对于主表的每条记录，只从非主表中检索一条记录。
If the database designer has created a Primary partition Index on a table, queries should incorporate the partitioning column.
如果数据库设计者已在表上创建了主分区索引，那么查询应当与分区列结合。
Notice that they contain fields corresponding to the database table columns and that the primary keys and relationships have been set (Figure 19).
注意它们包含了与数据库表列，以及设置的主关键字、关系相对应的区域(图19)。
Also, before setting up replication in DB2, you will want to ensure that every database table has a primary key or unique index.
此外，在DB 2中创建复制之前，您会希望保证每一个数据库表都具有一个主键或惟一索引。
For foreign key creation, another table with a primary key with a compatible data type is required.
对于创建外键，则需要另外一个具有主键的表，且该主键具有兼容的数据类型。
Having the database generate values for the primary key for a table (and by extension, any foreign key values for related tables) eliminates the burden from the application from having to do so.
数据库为一个表格的主键生成值(通过扩展，为相关表生成外主键)，从而将程序从这项任务的重担中解放出来。
Annotations within a JPA entity can represent table columns, relationships to other tables, primary keys, and so on.
一个JPA实体中的注释，可以显示出表格的列，其他表格之间的关系，主关键字以及等等。
Learn about relational databases, data models, unique keys, primary keys, foreign keys, and table joins.
了解关系数据库、数据模型、惟一键、主键、外键和表联结。
If you don't, you need to have some way of uniquely identifying each user in a database table (a primary key, usually an integer), a username (also unique), an E-mail address, a password, etc.
如果还没有，那么需要采用某种方式使用一个数据库表(一个主键，通常是一个整数)、一个用户名(也是惟一的)、一个电子邮件地址和密码等标识每个用户。
The latter is actually a primary key lookup against the parent table and constitutes the foreign key constraint verification.
索引扫描实际上是对父表进行主键查找，并完成外键约束验证。
An example would be retrieving and caching the next available batch of keys from a primary key sequence table.
例如，在从主键序列表中检索并缓存下一批可用的键值时。
The primary key and any unique index of the table must be a superset of the associated partitioning key.
表的主键和所有惟一索引都必须是相关分区键的超集。
One parameter is a collection of associative arrays that describe the database: table names, column names, primary keys, and foreign keys.
一个参数是描述数据库的关联数组集合：表名、列名、主键和外键。
A dimension table needs a generalized key as the primary key data; this becomes the foreign key in the fact table.
维度表需要作为主键数据的通用键；这将作为事实表的外键。
To filter by location with Solr, the three primary mechanisms in Table 1 are available to application writers for restricting the document space.
为了使用Solr根据位置进行过滤，表1为应用程序的记录器提供了3种主要的机制来限制文档空间。
Uniqueness in the CCD table must be enforced — either by a primary key or unique index on the source table or CCD table.
ccd表中必须有惟一性约束——可以通过主键或者源表或ccd表上的惟一索引实现。
Query performance can be improved by leveraging like data types (i.e. INT32 to INT32) when joining foreign keys in a fact table to primary keys in a dimension table.
通过在将fact表中的外键与dimension 表中的主键进行连接时采用like数据类型（例如 INT32 to INT32），可提高查询性能。
Highlight your primary delimited file table (DELIM1), click on Select, then close the access definition, and save.
高亮显示您的主分隔文件表(DELIM1)，单击Select，然后关闭访问定义，并保存。
Say your database schema contains three primary key table columns named "list_id", "ListId", and "list_value".
比方说你的数据库模式中包含三个作为主键的表列，分别命名为“list _ id ”、“ListId ”和“ list _ value ”。
A grid that allows the mapping of the columns in the current table to the primary key columns in the mapped table.
一个允许将当前表中的列映射到被映射表的主键列的表格。
Then it updates the employee name in the employee table using the identifier field, which is the primary key for this table.
最后使用field字段(该表的主键)更新employee表中的雇员名称。
The RentalLocation table can obtain all of its assigned vehicles through the Assigned Location primary key field in the Vehicle table.
RentalLocation表可以通过Vehicle表中的AssignedLocation主键字段获取所有它分配的车辆。
The Location table contains a foreign key (region_id) that corresponds to primary key of the region table.
location表包含一个外键(region_id)对应region表的主键。
The key is in fact the primary key of the table that to which it refers.
实际上关键是表的主键的指向。
So a different solution was found if an identifying column like a primary key is found in the table.
所以，如果在表中找到一个标识列，例如主键，则可以找到一种不同的解决方案。
The following table contains a description of the primary components of this test assertion.
下表包含了对这个测试断言中主要组件的描述。
Simply running it twice will produce an error, because the same star names (which are the primary key for the table) are used again, causing an error with duplicate primary key values.
简单地运行两次会产生错误，因为相同的星星名称（作为表的主键）使用了两次，则会由于重复的主键值导致错误。
This method takes three parameters, the primary key, the action performed on the table (create, update, delete) and a result set.
此方法具有三个参数，主键、对表执行的操作(创建、更新、删除)和结果集。
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