彩票走势图

轻量级的dbExpress驱动程序，用于访问以下数据库服务器：

dbExpress驱动程序的优点

与CodeGear提供的标准驱动程序相比，Devart dbExperss驱动程序提供了一系列优势。除了先进的稳定性、功能和效率外，它们还提供了访问市场上所有类似解决方案数据的最佳方式，以及无需使用客户端软件即可通过本机协议进行连接的能力。除了其他优点，还有：

直接访问数据

使用本机库为用户提供最佳数据访问。适用于Oracle、MySQL和PostgreSQL的Devart dbExpress驱动程序无需使用客户端软件即可通过本机协议进行连接。

高性能

如果需要开发快速有效的数据访问应用程序，请使用Devart dbExpress驱动程序。

支持最新版本的服务器

Devart dbExpress驱动程序支持最新版本的Oracle、MySQL、PostgreSQL、Microsoft SQL Server、Interbase、Firebird和Yaffil。

支持所有数据类型

dbExpress驱动程序支持所有数据类型，这些数据类型可以映射到dbExpress数据类型。此外，bExpress驱动程序还有其他控制数据类型映射的选项，例如EnableBCD选项，它允许驱动程序在ftFMTBcd字段类型上映射NUMERIC、DECIMAL、BIGINT数据类型。

高级行为的扩展选项

Devart dbExpress驱动程序提供了几个扩展选项，可以扩展驱动程序的功能。例如，Prepared选项允许准备所有数据集。如果连接断开，则应重新连接选项控件，如果应执行自动重新连接。

完全支持dbExpress版本4

这个驱动程序与dbExpress版本4完全兼容，可以在使用CodeGear RAD Studio 2007及更高版本开发的应用程序中使用，而不会出现任何性能或功能损失。

使用dbMonitor监视查询执行的能力

dbMonitor简化了调试过程，允许用户查看应用程序数据库交互日志。用户可以监视所有已执行的SQL语句，连接/断开连接和事务事件，并查看SQL语句执行状态，数据库错误消息，参数及其值。

源代码可用

用户可以订购包含源代码的版本。它可用于调试和定位错误，或者如果用户需要在应用程序的驱动程序中更改某些内容。

易于部署

用户需要使用dbExpress驱动程序在应用程序中部署一个额外的dll。

包括具有优先支持的年度订阅

订阅计划是Devart dbExpress驱动程序用户的年度维护和支持服务。

它允许每个用户在发布时免费访问最新驱动程序版本，访问驱动程序的所有更新和错误修复，通过优先支持程序获得产品支持，以及有关新产品版本的通知。

优先支持是一项高级产品支持计划，可为用户提供开发人员自己提供的产品相关问题的快速个人帮助。优先支持通过电子邮件进行，并有两个工作日的响应政策。

每位开发人员可获得免版税

开发人员不需要支付作者的版税，他们的许可证授权使用驱动程序进行软件开发。

We offer lightweight dbExpress drivers for access to the following database servers:

Advantages of our dbExpress drivers

Devart dbExperss drivers offer a set of advantages in comparison with the standard drivers supplied by CodeGear. Along with advanced stability, functionality, and efficiency they present the most optimal way to access data of all similar solutions available on the market, and also the ability to connect through native protocol without using client software. Among other advantages, we can name:

Direct access to data

We offer you optimal data access using native libraries. Devart dbExpress drivers for Oracle, MySQL, and PostgreSQL are able to connect through the native protocol without using client software.

High performance

Use Devart dbExpress drivers if you need to develop fast and efficient data access applications.

Support for the latest versions of servers

Devart dbExpress drivers support latest versions of Oracle, MySQL, PostgreSQL, Microsoft SQL Server, Interbase, Firebird, and Yaffil.

All data types support

Our dbExpress drivers support all the data types, which may be mapped to dbExpress data types. Besides, our dbExpress drivers have additional options to control data type mapping, such as EnableBCD option, which allows the driver to map NUMERIC, DECIMAL, BIGINT datatypes on ftFMTBcd field type.

Extended options for advanced behaviour

Devart dbExpress drivers offer several extended options that expand functionality of the driver. For example, Prepared option allows all dataset to be prepared. Reconnect option controls if automatic reconnect should be performed if the connection is broken.

Complete support for dbExpress version 4

Our drivers are completely compatible with the dbExpress version 4 and can be used in applications, developed with CodeGear RAD Studio 2007 and later without any performance or feature loss.

Ability of monitoring query execution with dbMonitor

dbMonitor eases the debug process, allowing you to view the application database interaction log. You can monitor all the executed SQL Statements, connect/disconnect and transaction events and view SQL statement execution status, database error messages, parameters with their values.

Source code available

 You may order edition with source code. It can be useful for debugging and locating errors, or if you need to change something in our drivers for your applications.

Easy to deploy

You need to deploy just a single additional dll with your application, using dbExpress drivers.

Include annual Subscription with Priority Support

Subscription Program is an annual maintenance and support service for users of Devart dbExpress drivers.

It grants every user free access to the latest drivers' versions when they are released, access to all updates and bug fixes of the driver, product support through the Priority Support program, and notifications on new product versions.

Priority Support is an advanced product support program which offers you expedited individual assistance with product-related questions from the developers themselves. Priority Support is carried out over email and has a two business day response policy. 

Licensed royalty-free per developer

The drivers don't require payment of author's royalty, and their license gives right to use the drivers for software development.