这就使得下面这条决定是否应该规格化数据的标准很明确：永远不要规格化数据，以免受支持的查询需要执行连结操作来选择记录。
This makes the criteria for deciding if you should normalize data straightforward: Never normalize data such that a supported query will need to perform a join operation to select records.
本文介绍了其中的两个操作：通过查询从服务器读取数据以及向服务器中添加新记录。
This paper covers two operations: reading data from the server through queries and adding new records to the server.
如果包装器函数需要记录一个动作，或者需要查询pseudo数据库，它将使用pseudo_client _ op函数来执行操作。
If a wrapper function needs to record or take note of an action, or needs to query the pseudo database, it USES the pseudo_client_op function to perform an operation.
现今的大多数XQuery实现执行连结(join)操作的效率很低，即使是一个只涉及几千条记录的简单查询都需要耗费大量的、令人难以接受的处理时间。
Most implementations of XQuery that exist today perform joins so inefficiently that even a simple query involving a few thousand records can take an unacceptable amount of time to process.
此操作将查询数据库以检索所有Catch记录。
This action queries the database to retrieve all Catch records.
本系统可以记录汽车零部件的进货入库和销售出库，可以对库存情况进行简单查询、汇总操作。
The system can record the purchase of auto parts warehousing and sales, and you can check the information of the auto parts easily, and make the summary of operation.
建立美容登记卡。凡是祛斑及保养期间的操作必须记录登记卡内，以便日后查询。
Establish hairdressing card. All during the operation and maintenance of the spot within CARDS must be recorded, Will future inquiry.
该方案可实现系统在线监视、命令操作和记录查询等功能，系统有较好的可移植性和数据完整性。
The design can realize on-time control and on-time monitor, command operation and record query, and so on. This system is transplantable easily and ensures the integrality of datum in the database.
操作数据库是为已知的任务和负载设计的，如使用主关键字索引和散列，检索特定的记录，和优化“罐装的”查询。
An operational database is designed and tuned from known tasks and workloads, such as indexing and hashing using primary keys, searching for particular records, and optimizing "canned" queries.
测试结果以数据和图形两种形式保存在数据库中，可以对所有的测试记录进行查询、检索、打印等操作。
The test result is saved in the database by data and graph, which could carry out inquiry, retrieval and print for all test records.
主要是练习VC操作数据库，包括添加、删除、修改、查询指定记录等基础类操作。
VC operation of the database are mainly exercises, including add, delete, modify, specify the records and other basic category of operations.
LSEQ编码通过记录非叶节点的路径，在节点查询中避免了结构连接操作，提高了查询效率。
Through storing the path of internal nodes, LSEQ enhanced querying efficiency and avoided structure-joining.
LSEQ编码通过记录非叶节点的路径，在节点查询中避免了结构连接操作，提高了查询效率。
Through storing the path of internal nodes, LSEQ enhanced querying efficiency and avoided structure-joining.
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