DB 2提供的GUI和命令行工具可以用来查看查询的解释计划。
DB2 provides GUI and command line tools to see explain plan of a query.
此外，还将讨论优化器的角色，其中包括OPTCOMPIND参数、查询命令和内部统计数据。
In addition, it discusses the role of the optimizer, including the OPTCOMPIND parameter, query directives, and internal statistics.
清单2 .arq命令指定数据源、SPARQL查询的位置和结果格式。
Listing 2. arq command specifying data sources, location of SPARQL query, and results format.
在pass - through会话中提交的sql语句和命令不会通过联邦查询编译器。
The SQL statements and commands submitted in a pass-through session do not go through the federated query compiler.
优化器的行为受三个关键因素的影响：Informix配置文件中OPTCOMPIND参数的值、查询命令和内部统计数据的准确性。
The behavior of the optimizer is influenced by three key factors: the value of OPTCOMPIND parameter in the Informix configuration file, query directives, and the accuracy of internal statistics.
配置服务支持会话这个概念；也就是说，直到保存命令被发出，所有通过配置服务进行的查询和修改才会被存入config目录。
Config service supports the concept of sessions; that is, all queries and modifications made through config service are not saved into the config directory until a save command is issued.
每一个sggrep命令可以同时指定主查询和子查询。
Each sggrep command can specify both the main query and a subquery.
领域特定语言能够表达人们更深层次的思想是因为，和普通的命令-查询式API相比，领域特定语言以一种更加自然的方式表述领域内的不同变化。
DSLs dive into peoples' minds here because DSLs are a natural way to express variations, in comparison to a command-query API.
CQS将命令和查询作为不同的方法放在一个类中。
CQS puts commands and queries in different methods within a type.
CQRS将命令和查询放到不同的对象上。
当它们各自的数组里有相同的索引时，数据查询和更新命令就是相关联的。
A data query and an update command are associated when they have the same index in their respective arrays.
小型数据库就是模拟目前比较流行的一些大型数据库，实现通过在命令行输入相应命令来对数据进行存储，管理和查询。
Minidatabase is to simulate popular database at present and implement data storage, management and querying by inputting commands from command line.
“参数化数据源”命令还将在窗体上创建控件，以供输入参数值和执行查询。
Parameterize Data Source command also creates controls on your form to input the parameter values and execute the query.
为了保证系统的实用性，审计系统还提供了功能齐备的用户层审计管理工具，包括审计配置和审计查询图形工具和一些审计命令。
As far as availability, auditing system provides functional user managing tools, including auditing configuration and auditing checking GUI tools and some shell commands.
为了保证系统的实用性，审计系统还提供了功能齐备的用户层审计管理工具，包括审计配置和审计查询图形工具和一些审计命令。
As far as availability, auditing system provides functional user managing tools, including auditing configuration and auditing checking GUI tools and some shell commands.
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