dbExpress是一個獨立于數據庫的層,它定義了通用接口以提供對SQL數據庫服務器的快速訪問。對于每個受支持的服務器,dbExpress提供驅動程序作為獨立庫,該庫實現用于處理查詢和存儲過程的公共dbExpress接口。由于數據訪問層非常簡單,因此dbExpress提供了高性能的數據庫連接,并且易于部署。用戶可以使用與CodeGear提供的驅動程序相同的方式使用這個驅動程序。
dbExpress is a database-independent layer that defines common interface to provide fast access to SQL database servers. For each supported server, dbExpress provides a driver as an independent library that implements the common dbExpress interfaces for processing queries and stored procedures. As data-access layer is thin and simple, dbExpress provides high performance database connectivity and is easy to deploy. You can use our drivers in the same way as the ones supplied by CodeGear.
輕量級的dbExpress驅動程序,用于訪問以下數據庫服務器:
dbExpress驅動程序的優點
與CodeGear提供的標準驅動程序相比,Devart dbExperss驅動程序提供了一系列優勢。除了先進的穩定性、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據的最佳方式,以及無需使用客戶端軟件即可通過本機協議進行連接的能力。除了其他優點,還有:
直接訪問數據
使用本機庫為用戶提供最佳數據訪問。適用于Oracle、MySQL和PostgreSQL的Devart dbExpress驅動程序無需使用客戶端軟件即可通過本機協議進行連接。
高性能
如果需要開發快速有效的數據訪問應用程序,請使用Devart dbExpress驅動程序。
支持最新版本的服務器
Devart dbExpress驅動程序支持最新版本的Oracle、MySQL、PostgreSQL、Microsoft SQL Server、Interbase、Firebird和Yaffil。
支持所有數據類型
dbExpress驅動程序支持所有數據類型,這些數據類型可以映射到dbExpress數據類型。此外,bExpress驅動程序還有其他控制數據類型映射的選項,例如EnableBCD選項,它允許驅動程序在ftFMTBcd字段類型上映射NUMERIC、DECIMAL、BIGINT數據類型。
高級行為的擴展選項
Devart dbExpress驅動程序提供了幾個擴展選項,可以擴展驅動程序的功能。例如,Prepared選項允許準備所有數據集。如果連接斷開,則應重新連接選項控件,如果應執行自動重新連接。
完全支持dbExpress版本4
這個驅動程序與dbExpress版本4完全兼容,可以在使用CodeGear RAD Studio 2007及更高版本開發的應用程序中使用,而不會出現任何性能或功能損失。
使用dbMonitor監視查詢執行的能力
dbMonitor簡化了調試過程,允許用戶查看應用程序數據庫交互日志。用戶可以監視所有已執行的SQL語句,連接/斷開連接和事務事件,并查看SQL語句執行狀態,數據庫錯誤消息,參數及其值。
源代碼可用
用戶可以訂購包含源代碼的版本。它可用于調試和定位錯誤,或者如果用戶需要在應用程序的驅動程序中更改某些內容。
易于部署
用戶需要使用dbExpress驅動程序在應用程序中部署一個額外的dll。
包括具有優先支持的年度訂閱
訂閱計劃是Devart dbExpress驅動程序用戶的年度維護和支持服務。
它允許每個用戶在發布時免費訪問最新驅動程序版本,訪問驅動程序的所有更新和錯誤修復,通過優先支持程序獲得產品支持,以及有關新產品版本的通知。
優先支持是一項高級產品支持計劃,可為用戶提供開發人員自己提供的產品相關問題的快速個人幫助。優先支持通過電子郵件進行,并有兩個工作日的響應政策。
每位開發人員可獲得免版稅
開發人員不需要支付作者的版稅,他們的許可證授權使用驅動程序進行軟件開發。
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.