Primary key的例句大全

the notion of a primary key that is application-specific is worth keeping around, even though not inherent to qbe.

特定于应用程序主键的概念值得经常注意，即使它没有继承QBE的概念。

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When the primary key violation error occurs, the entire transaction is rolled back and no rows are added to the destination table.

在发生了主键冲突错误时，回滚整个事务并且不会将任何行添加到目标表。

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First, you usually want to have a ( surrogate) object identifier that maps to the primary key of the corresponding database table

首先，您通常要具有一个映射到对应数据库表主键的（代理）对象标识符

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Effects of primary key stratum location on height of water flowing fracture zone

覆岩主关键层位置对导水裂隙带高度的影响

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to fix this conflict, you may change the foreign key to match an existing primary key, reinsert the original primary key value, or ignore the conflict.

若要解决此冲突，您可以更改外键以与现有的主键匹配，也可以重新插入初始主键值，或忽略此冲突。

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We use place name as the primary key word to build the relationships between the spatial database and attribute database or each attribute tables.

并将各地地名作为主关键字，以实现空间库与属性库以及各属性库之间的关联。

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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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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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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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Instead, it requires the developer only to denote the attributes to be persisted and to identify the attribute to represent the object's unique identifier ( or primary key).

相反，它只需要程序员将属性标记为持久性的，并识别出能代表对象唯一标识符（或者主键）的属性。

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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。

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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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Entities that share some attributes, including an identifier ( primary key), but not others may be modelled as having a common supertype.

一些实体具有某些共同的属性，比如标识符（主键），而其他属性不同，这些实体可能具有共同的超类型。

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Click the first icon to add the primary key attribute.

点击工具栏中的第一个图标以添加主属性。

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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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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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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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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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The virtual primary key was regarded as the marked benchmark for the relational database instead of the real primary key, and error was introduced in the database specified least significant bit by embeding a binary image watermarking.

本文提出了一种基于虚拟主键的关系数据库水印算法，构建虚拟主键代替真正主键对关系数据库进行标记，引入误差到关系数据库指定的最低有效位LSB中，实现二值图像的水印信息嵌入。

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