Examples of using 主键 in Chinese and their translations into English
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升迁向导”将Access主键转换为SQLServer索引并将其标记为SQLServer主键。
The Upsizing Wizard converts Access primary keys to SQL Server indexes and marks them as SQL Server primary keys.如果您使用的自动编号字段作为主键或复制ID，您不应设置此属性。
If you are using an AutoNumber field as a primary key or as a Replication ID, you should not set this property.如果您是刚接触Access并且不熟悉数据库设计和为什么需要主键，请参阅文章数据库设计基础。
If you're new to Access and unfamiliar with database design and why you need primary keys, see the article Database design basics.要确保主键字段不为空，我们必须向该字段添加NOTNULL设置。
To ensure that the primary key field cannot be null, we must add the NOT NULL setting to the field.今天，我们将讨论DDD意义上的标识与数据库主键之间的区别。
Today, we will discuss the difference between identity in the DDD sense and database primary keys.实际上，索引也是一张表，该表保存了主键与索引字段，并指向实体表的记录。
In fact, the index is also a table that holds the primary key and index fields and points to the records of the entity table.但在某些情况下，我们需要在不同的数据库之间进行数据合并，所以我们需要主键是全局唯一的。
Sometimes we need to migrate data between databases, so we need our primary keys to be globally unique.我们发现大约70%的操作是键值查找，其中仅使用主键并返回单行。
About 70 percent of operations were of the key-value kind, where only a primary key was used and a single row would be returned.使用“数据库属性”窗口添加或更改列的属性，包括数据类型和主键。
Use the Database Properties window to add or change properties for columns, including data types and primary keys.这条规则只不过是“三范式”里的“第二范式”：“所有字段都必须完整地依赖主键而不是部分依赖”。
This rule is nothing but the 2nd normal form:“All 如果表变量包含大量数据，请注意索引非常有限（只有主键索引）；.
If the table variable contains a large amount of data, be aware that the index is very limited(only the primary key index).请注意：对于一对多关联来说，“主键”很可能并不是数据库表的物理主键。
Note that for a one-to-many association, the"primary key" may not be the physical primary key of the database.(4)为什么SQLite不允许在同一个表不同的两行上使用0和0.0作主键？?
(4) Why doesn't SQLite allow me to use'0' and'0.0' as the primary key on two different rows of the same table?键值和宽列数据模型在系统中是不透明的，只有主键可以被查询。
The key-value and wide-column data model is opaque in the system- only the primary key can be queried.如果没有数据适合用作主键，可以创建用作主键的新字段。
If no suitable data exists to use as a primary key, you can create a new field to use as a primary key.主数据连接中使用的主数据库表包含主键、唯一限制或唯一索引。
The 这条规则只不过是“三范式”里的“第二范式”：“所有字段都必须完整地依赖主键而不是部分依赖”。
This rule is nothing but second normal form"All InnoDB中的所有数据都存储在数据库页面，构成了B-tree索引，即聚簇索引或主键索引。
All data in InnoDB is stored in database pages comprising a B-tree index(the clustered index or primary key index).通常存在一个唯一标识编号，如ID号、序列号或充当主键的代码。
Often, there is a unique identification number, such as an ID number, a serial number, or a code, that serves as a primary key.如果想有一个串行列的唯一约束或主键，它现在必须被指定，就像其他数据类型。
If you wish a serial column to be UNIQUE or a PRIMARY KEY it must now be specified, just as with any other data type.
