輕量級的dbExpress驅(qū)動(dòng)程序，用于訪問以下數(shù)據(jù)庫服務(wù)器：

dbExpress驅(qū)動(dòng)程序的優(yōu)點(diǎn)

與CodeGear提供的標(biāo)準(zhǔn)驅(qū)動(dòng)程序相比，Devart dbExperss驅(qū)動(dòng)程序提供了一系列優(yōu)勢。除了先進(jìn)的穩(wěn)定性、功能和效率外，它們還提供了訪問市場上所有類似解決方案數(shù)據(jù)的最佳方式，以及無需使用客戶端軟件即可通過本機(jī)協(xié)議進(jìn)行連接的能力。除了其他優(yōu)點(diǎn)，還有：

直接訪問數(shù)據(jù)

使用本機(jī)庫為用戶提供最佳數(shù)據(jù)訪問。適用于Oracle、MySQL和PostgreSQL的Devart dbExpress驅(qū)動(dòng)程序無需使用客戶端軟件即可通過本機(jī)協(xié)議進(jìn)行連接。

高性能

如果需要開發(fā)快速有效的數(shù)據(jù)訪問應(yīng)用程序，請使用Devart dbExpress驅(qū)動(dòng)程序。

支持最新版本的服務(wù)器

Devart dbExpress驅(qū)動(dòng)程序支持最新版本的Oracle、MySQL、PostgreSQL、Microsoft SQL Server、Interbase、Firebird和Yaffil。

支持所有數(shù)據(jù)類型

dbExpress驅(qū)動(dòng)程序支持所有數(shù)據(jù)類型，這些數(shù)據(jù)類型可以映射到dbExpress數(shù)據(jù)類型。此外，bExpress驅(qū)動(dòng)程序還有其他控制數(shù)據(jù)類型映射的選項(xiàng)，例如EnableBCD選項(xiàng)，它允許驅(qū)動(dòng)程序在ftFMTBcd字段類型上映射NUMERIC、DECIMAL、BIGINT數(shù)據(jù)類型。

高級行為的擴(kuò)展選項(xiàng)

Devart dbExpress驅(qū)動(dòng)程序提供了幾個(gè)擴(kuò)展選項(xiàng)，可以擴(kuò)展驅(qū)動(dòng)程序的功能。例如，Prepared選項(xiàng)允許準(zhǔn)備所有數(shù)據(jù)集。如果連接斷開，則應(yīng)重新連接選項(xiàng)控件，如果應(yīng)執(zhí)行自動(dòng)重新連接。

完全支持dbExpress版本4

這個(gè)驅(qū)動(dòng)程序與dbExpress版本4完全兼容，可以在使用CodeGear RAD Studio 2007及更高版本開發(fā)的應(yīng)用程序中使用，而不會出現(xiàn)任何性能或功能損失。

使用dbMonitor監(jiān)視查詢執(zhí)行的能力

dbMonitor簡化了調(diào)試過程，允許用戶查看應(yīng)用程序數(shù)據(jù)庫交互日志。用戶可以監(jiān)視所有已執(zhí)行的SQL語句，連接/斷開連接和事務(wù)事件，并查看SQL語句執(zhí)行狀態(tài)，數(shù)據(jù)庫錯(cuò)誤消息，參數(shù)及其值。

源代碼可用

用戶可以訂購包含源代碼的版本。它可用于調(diào)試和定位錯(cuò)誤，或者如果用戶需要在應(yīng)用程序的驅(qū)動(dòng)程序中更改某些內(nèi)容。

易于部署

用戶需要使用dbExpress驅(qū)動(dòng)程序在應(yīng)用程序中部署一個(gè)額外的dll。

包括具有優(yōu)先支持的年度訂閱

訂閱計(jì)劃是Devart dbExpress驅(qū)動(dòng)程序用戶的年度維護(hù)和支持服務(wù)。

它允許每個(gè)用戶在發(fā)布時(shí)免費(fèi)訪問最新驅(qū)動(dòng)程序版本，訪問驅(qū)動(dòng)程序的所有更新和錯(cuò)誤修復(fù)，通過優(yōu)先支持程序獲得產(chǎn)品支持，以及有關(guān)新產(chǎn)品版本的通知。

優(yōu)先支持是一項(xiàng)高級產(chǎn)品支持計(jì)劃，可為用戶提供開發(fā)人員自己提供的產(chǎn)品相關(guān)問題的快速個(gè)人幫助。優(yōu)先支持通過電子郵件進(jìn)行，并有兩個(gè)工作日的響應(yīng)政策。

每位開發(fā)人員可獲得免版稅

開發(fā)人員不需要支付作者的版稅，他們的許可證授權(quán)使用驅(qū)動(dòng)程序進(jìn)行軟件開發(fā)。

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.