The default values in the field would most likely be retrieved from a database or operational system, using the UPC symbol as the key value.
字段中的默认值很可能是通过使用upc符号作为键值从一个数据库或运营系统中检索到的。
Then when a value is set, the key is removed from the database and a new record is added with the updated value.
在设置一个值后，键就从数据库中移除掉，并添加一条具有更新过的值的新记录。
It will simply return a value of 0 as the key to the trade order without changing the database.
它只是返回一个值0作为交易订单的键，而不会更改数据库。
With DPF, each row of a given table is placed in a specific database partition based on the hashed value of the table's distribution key, which is defined when the table is created.
在使用DPF时，根据表的分布键(这在创建表时定义)的散列值，把表的每一行放在特定的数据库分区中。
To specify further that the unique key attribute (marked with @Id annotation) will rely on your database to generate its value.
进一步地指定独一的主键值（标为 @Id注释），取决于生成值的数据库。
The key path property is the location within the message whose value will be used as a lookup key in the database.
Keypath属性是要将其值作为数据库中的查询键使用的消息的位置。
This node object is populated with data from the database record in the node and node_revisions tables, whose primary key field value is the same as the node id in the URL.
用node和 node_revisions表中的数据库记录数据填充这个节点对象（node object），这个记录的主键字段值与URL 中的节点id相同。
The addProduct() method in Listing 9 accepts a new product record as an array of key-value pairs and then uses the Zend_Db object's insert() method to write this record to the database table.
清单9中的 addProduct() 函数接收一个新产品记录作为键-值对数组，然后使用 Zend_Db对象的insert() 函数将记录写入到数据库表中。
SimpleDB is a simple data storage that lacks the sophistication of a full-fledged Relational Database Management System (RDBMS), while providing scalable key-value storage.
SimpleDB是一个简单的数据存储，它缺乏一个完全成熟的关系数据库管理系统(RDBMS)所拥有的完善的功能，但是提供了一种可伸缩的键值存储。
The Oracle NoSQL Database is a key-value datastore designed for high scalability and availability, and deployed on multiple replicated nodes for rapid failover and load balancing.
OracleNoSQLDatabase是一种键-值数据存储，设计时考虑到了高扩展性和高可用性，并可部署于多个互相复制的节点上，以便进行快速故障切换及负载均衡。
The ZODB will always be able to see when you set a key to a new value. So a change to the above database like the following will get automatically detected and persisted.
当您将某个键设置为新值时，ZODB始终能够了解这一点。
But you don't, so you need this separate transaction to get the database generated key value and still perform the whole operation in a transaction.
但是你没有，所以你需要这个单独的事务数据库生成的键值，并仍在事务中执行所有操作。
But you don't, so you need this separate transaction to get the database generated key value and still perform the whole operation in a transaction.
但是你没有，所以你需要这个单独的事务数据库生成的键值，并仍在事务中执行所有操作。
应用推荐