Microsoft Data Access Components
MDAC 是微軟 Windows 平台的統一資料存取方案 | |
| 開發者 | Microsoft |
|---|---|
| 当前版本 | 2.8 SP1 (2.81.1117.6)（May 2005） |
| 操作系统 | Windows 98, Windows Me, Windows NT 4, Windows 2000, Windows XP, Windows Server 2003 |
| 类型 | Database |
| 许可协议 | Microsoft EULA |
| 网站 | Microsoft MDAC Center |
Microsoft Data Access Components (MDAC) 是微軟專門為資料存取功能而發展的應用程式開發介面，做為微軟的統一化資料存取 (Universal Data Access; UDA) 解決方案的核心組成，最初的版本在 1996 年時發表，其組成元件有 ODBC，OLE DB 以及 ADO，其中 ADO 是在 Visual Basic 上唯一的資料存取管道，而 OLE DB 則是基於 COM 之上，供 C/C++ 存取與提供資料的介面，ODBC 則是統一化的資料存取 API。
版本列表
There are two ways of checking the version of MDAC that is installed on a computer. One way is via Microsoft's Component Checker program, which compares the value of each installed MDAC DLL to the MDAC file manifest. The second way is to check the key HKEY_LOCAL_MACHINE\Software\Microsoft\DataAccess\FullInstallVer in the Windows registry. Microsoft notes that this information may be incorrect for versions of MDAC prior to 2.1 when compared with the versions of the MDAC files installed to the system[1]
| Version | Release date | Distribution mechanism | Features | Security issues |
|---|---|---|---|---|
| 1.0 | August 1996 |
No coordinated release:
|
|
No bulletins released |
|
1.5 |
September 1997 – March 1998 |
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|
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| 1.5a | September 1997–March 1998 |
|
Service release | |
| 1.5b | September 1997–March 1998 |
|
Service release | |
| 1.5c | September 1997–March 1998 |
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| |
| 2.0 | July 1, 1998 |
|
|
|
| 2.0SP1 | July 1, 1998 |
|
Y2K remediation for Windows NT 4.0 | |
| 2.0SP2 | July 1, 1998 |
|
Y2K remediation for all platforms | |
| 2.1 | July 11, 1998 |
|
|
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| 2.1 SP1 | March 15, 1999 |
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| 2.1 SP1a (GA) | April 1, 1999 |
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| 2.1 SP2 | July 1999 |
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| 2.5 | February 17, 2000 |
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|
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| 2.5 SP1 | July 31, 2000 |
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| 2.5 SP2 | April 2000 |
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| 2.5 SPS3 | December 2003 |
| ||
|
2.6 |
September 2000 |
|
Not included (manually installed):
|
|
| 2.6 SP1 | May 2001 |
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| 2.6 SP2 | May 2002 |
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| 2.7 | October 2001 |
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| 2.8 | August 2003 |
|
Fixed bugs and security issues |
|
| 2.8 SP1 | May 2005 |
|
Fixed bugs |
|
| 2.8 SP2 | March 2005 |
|
||
| 9.0 | Never released: Microsoft now includes MDAC with operating system updates. |
|
||
| Windows DAC 6.0 (a variant of MDAC for use with Vista) | November 2006 |
|
No new features, for use with Windows Vista |
參考資料
- ^ Microsoft. MS KB article 301202, How to check for MDAC version, last updated January 18, 2005, retrieved September 29, 2005.
- ^ Chapter 11 Changes, supplementary material to "A First Look at SQL Server 2005 for Developers" by Bob Beauchemin, Niels Berglund, and Dan Sullivan.