Using the biological primary databases at the National Center for Biotechnology Information (NCBI), we constructed a secondary database of phytohormone-related nucleotides and proteins.
以NCBI维护的一级数据库为数据源建立植物激素相关核酸和蛋白质二级数据库。
In this situation, you need to start the database on the primary machine as the standby to get the two databases back in sync again.
在此情况下，您需要将主要计算机上的数据库作为备用数据库启动，以便这两个数据库重新保持同步。
After the databases on the standby and primary machines are started successfully, you need to ensure that both databases are in sync.
在备用计算机和主要计算机上的数据库成功启动后，您需要确保两个数据库处于同步状态。
Since the primary characteristics of a data grid are scalability and high availability, high-speed disks and databases used exclusively for persistence are no longer needed in most cases.
由于数据网格的主要特征是可伸缩性和高可用性，专门用于持久性的高速磁盘和数据库在大多数情况下不再需要。
Therefore, when the primary is back online again, the databases on the primary and standby might be out of sync.
因此，当主要计算机重新联机之后，主要计算机和备用计算机上的数据库可能会失去同步。
Once the databases are in peer mode, the DB2 HADR servers on the primary and standby machines are ready for use.
在数据库处于对等模式之后，主要计算机和备用计算机上的DB 2HADR服务器就准备就绪可供使用了。
You will need to wait until the standby database makes a connection with the primary database to get both databases in peer mode.
您需要等待备用数据库连接到主要数据库之后，才能使两个数据库处于对等模式。
Generates a text list file with all migrated primary mail file paths on the server, excluding any replica mail databases.
生成一个文件列表文件，该文件包含服务器上的所有已迁移主要邮件文件路径，但不包括任何复制邮件数据库。
The following commands will backup your databases on the primary machine (also shown in Listing 4).
下面的命令将备份主要计算机上的数据库（如清单4 中所示。）
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。
It is common for relational databases to use the concept of primary keys, generated by an auto-increment feature or by a sequence generator.
在关系数据库中通常可以使用主键，它由一个自动递增特性或序列生成器生成。
Also, the state now for both databases on the standby and primary should be in the "Peer" state.
而且，备用计算机和主要计算机上数据库的状态现在都应该处于“Peer”状态。
It replaces DTS packages as one of the primary ways to move large amounts of data into and out of SQL Server from other data sources such as flat files and non-Microsoft databases.
它代替DTS包作为一个首要的方式，来把大量的数据从其他类似的平面文件和非微软数据库的数据源中移入到SQLServer中，或从SQL Server移出。
In primary storage, on the other hand, your customer may have some duplicate databases but not much else.
而另一方面，客户可能在主存储中有一些重复的数据库，但却不会太多。
Stop all primary machines (including databases).
停止所有原始机器(包括数据库)。
Once you configured the primary and standby databases through various database configuration parameters and restored the primary database at the standby location, you could start HADR function.
在通过各种数据库配置参数配置了主备数据库并在备用位置恢复了主数据库之后，您就可以启动hadr函数了。
As a result, if you rely on database sequences (such as for automatic primary key generation), it's likely that an identical primary key will show up across a set of databases.
因此，如果您依赖于数据库序列(如自动主键生成)，很有可能在一个数据库集中将出现同一个主键。
Asynchronous availability does not guarantee that primary and secondary system databases are completely synchronized.
而异步可用性则不保证主系统和辅助系统是完全同步的。
For each step, we've listed some key V8.2 enhancements that apply to OLTP databases, where the primary interest is in indexes.
对于每一步，我们列出了V8.2中适用于OLTP数据库(其中最相关的就是索引)的一些关键的增强。
That's one reason why you don't use your primary e-mail account for most online commerce and instead let companies store a less valuable address in their databases.
这就是为什么你不使用私人邮件地址用于大部分的网上电子商务，而是给个次要的邮件地址让这些公司保存到数据库去。
If the primary and standby databases are not identical when HADR is started, an error will occur.
在启动HADR时，如果主和备用数据库不相同，就会发生错误。
The primary key users_id is not portable across databases.
主键users_id在数据库之间并不是可以移动的。
Due to their importance in relational databases, Primary keys are the most fundamental aspect of all keys and constraints.
由于其在关系型数据库中的重要性，主键是所有键和约束里最基础的方面。
Solutions include sharding (splitting up a table across multiple databases based on the primary key), replication, and usage of simplified databases with weakened consistency semantics.
解决方案 有：sharding （基于主键值讲数据表分散到多个数据库中），复制，利用弱语义一致性的简化数据库。
How to shield the difference among the distributed heterogeneous database is the primary problem to be solved to implement the mutual visiting among the multiple databases.
如何屏蔽分布在不同站点上的异构数据库之间的差异，是实现多个数据库互访要解决的首要问题。
Some databases have different functionality for primary key constraints.
对于主键约束，有些数据库具有不同的功能。
Some databases have different rules for primary key constraints.
对于主键约束，有些数据库具有不同的规则。
Some databases have different rules for primary key constraints.
对于主键约束，有些数据库具有不同的规则。
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