primary key

A primary key of a table can be a foreign key in any other table.

主键的表可以是外键,在任何其他表.

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Defining the table's primary key ( after creating columns ).

在创建列后 定义表 的主键.

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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DB2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。

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In other words, all columns that are part of the partitioning key must be present in the primary key or unique index definition.

换句话说，作为分区键一部分的所有列都必须出现在主键或惟一索引定义中。

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Right-click the column you want to set as the primary key.

右击要将其设置为主键的列.

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You can't update the record because another user or application deleted it or changed the value of its primary key.

由于其他用户或程序已经删除了该记录或更改了其主键的值，所以无法对其进行更新。

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Every record in the table has a unique ID called the primary key.

表中的每个记录都有一个惟一的ID，称为主键。

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Right-click the row selector for the column and select Set Primary Key.

右击该列的行选择器,然后选择“设置主键”.

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Make sure that you use the right keys in the WHERE clause, which should preferrably be either the primary key or a unique index.

要确保在WHERE子句中使用正确的键，这个键最好是主键或惟一索引。

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Accessor 1 contains all columns except the primary key.

访问器1包含除主键外的所有列.

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Choose two fields from the database table that comprise the primary key.

从数据库表中选择构成主关键字的两个字段.

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It is the primary key technical link in natural language processing. The current technology of Chinese word segmentation is working for Chinese text.

它是自然语言处理过程中首要的技术环节，其重要性不言而喻。目前的中文分词技术主要针对中文文本进行分词。

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Check to be sure the proposed primary key field ( s) could never contain duplicate values.

请检查确认建议的主键字段永远不包含重复值。

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GetJSONDocumentByKey uses a key value to post a getDocumentByKey to the service to retrieve a single JSON record with the primary key matching the input value.

getJSONDocumentByKey使用一个键值向此服务发布一个getDocumentByKey来检索主键与这个输入值相匹配的一个JSON记录。

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However, you can change the order of columns after the primary key is created.

但是, 可在创建主键后更改列的顺序.

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Null value is not allowed in unique index or primary key.

唯一性索引或主键中不允许有空值。

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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。

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Gets the row specified by the primary key value.

获取包含指定的主键值的行.

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This index requires each value in the primary key to be unique.

该索引要求主键中的每个值都唯一.

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An example is if the query includes a primary key in the output list.

例如,查询在输出列表中包括主键时.

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The primary key can't be a primitive type.

主类型不能成为主键.

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The element defines the primary key of the main table.

元素定义了主表格中的主键.

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When a primary key constraint is defined, the federated system automatically creates a unique index specification.

当定义一个主键约束时，联邦系统自动创建一个惟一的索引规范。

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You tried to enter a duplicate value in a field that is a primary key or that has a unique index.

试图在主键字段或含有唯一索引的字段中输入重复值。

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The primary key can be specified only for the top root view.

不可以在一列或多列上同时有主键和唯一约束.

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However, you may need to manually define a primary key in the data source view.

但是，您可能需要在数据源视图中手动定义主键。

provided by jukuu

RemoveExceptionRemove an EJB object identified by its primary key.

删除由主键标识的EJB对象.

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A primary key is a column a unique value for each row.

主键是指每记录行带有唯一值的栏目.

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You must specify the primary key for a table.

您必须指定主键的表.

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Note: The primary key field is numeric by default.

注意: 主键字段默认为数值型.

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