Microsoft Access - Wikipedia. Microsoft Access is a database management system (DBMS) from Microsoft that combines the relational. Microsoft Jet Database Engine with a graphical user interface and software- development tools. It is a member of the Microsoft Office suite of applications, included in the Professional and higher editions or sold separately. Microsoft Access stores data in its own format based on the Access Jet Database Engine. It can also import or link directly to data stored in other applications and databases. Like other Microsoft Office applications, Access is supported by Visual Basic for Applications (VBA), an object- based programming language that can reference a variety of objects including DAO (Data Access Objects), Active. X Data Objects, and many other Active. X components. Visual objects used in forms and reports expose their methods and properties in the VBA programming environment, and VBA code modules may declare and call Windows operating system operations. History. Omega was also expected to provide a front end to the Microsoft SQL Server. It was assumed that the project would make use of Extensible Storage Engine (Jet Blue). The project used some of the code from both the Omega project and a pre- release version of Visual Basic. The product shipped on seven 1.
Microsoft Access VBA to edit SQL queries. A saved QueryDef is basically the same as a VIEW in server databases. Browse other questions tagged ms-access vba.MB diskettes. The manual shows a 1. Originally, the software worked well with relatively small databases but testing showed that some circumstances caused data corruption. For example, file sizes over 1. MB proved problematic (note that most hard disks held less than 5. MB at the time this was in wide use), and the Getting Started manual warns about a number of circumstances where obsolete device drivers or incorrect configurations can cause data loss. With the phasing out of Windows 9. ME, improved network reliability, and Microsoft having released 8 service packs for the Jet Database Engine, the reliability of Access databases has improved. Since then, Microsoft has released new versions of Microsoft Access with each release of Microsoft Office. This includes Access 9. 4TOPS Query Tree Editor for MS Access for query analysis and development. Queries are created faster; SQL Editor replacement. MS Access Databases Queries Editor. A very productive, easy to use tool to edit your Sql Queries against MS Access Databases. Http:// http:// http://squirrel-sql.sourceforge.net/. Access 2. 00. 0 (version 9. Access 2. 00. 2 (version 1. Access 2. 00. 3 (version 1. Access 2. 00. 7 (version 1. Access 2. 01. 0 (version 1. Access 2. 01. 3 (version 1. Versions 3. 0 and 3. Microsoft Jet database engine (used by Access 7. Access 9. 7 respectively) had a critical issue which made these versions of Access unusable on a computer with more than 1 GB of memory. Formats include Access 1. The most significant transition was from the Access 9. Access 2. 00. 0 format; which is not backward compatible with earlier versions of Access. New features were added to the Access 2. Access 2. 00. 2, 2. Microsoft Access 2. GB from 1. GB in Access 9. Microsoft Access 2. ACCDB. It supports links to Share. Point lists and complex data types such as multivalue and attachment fields. These new field types are essentially recordsets in fields and allow the storage of multiple values or files in one field. Microsoft Access 2. File Attachment field, which stored data more efficiently than the OLE (Object Linking and Embedding) field. Microsoft Access 2. ACCDB format supported hosting Access Web solutions on a Share. Point 2. 01. 0 server. For the first time, this allowed Access solutions to be run without having to install Access on their PC and was the first support of Mac users. Any user on the Share. Point site with sufficient rights could use the Access Web solution. A copy of Access was still required for the developer to create the Access Web solution, and the desktop version of Access remained part of Access 2. The Access Web solutions were not the same as the desktop solutions. Automation was only through the macro language (not VBA) which Access automatically converted to Java. Script. The data was no longer in an Access database but Share. Point lists. An Access desktop database could link to the Share. Point data, so hybrid applications were possible so that Share. Point users needing basic views and edits could be supported while the more sophisticated, traditional solutions could remain in the desktop Access database. Microsoft Access 2. Access desktop solutions plus a significantly updated Share. Point 2. 01. 3 web solution. Unlike Share. Point lists, this offers true relational database design with referential integrity, scalability, extensibility and performance one would expect from SQL Server. The Access 2. 01. Access 2. 01. 0 but several features were discontinued including support for Access Data Projects (ADPs), pivot tables, pivot charts, Access data collections, source code control, replication, and other legacy features. Microsoft Access was the first mass- market database program for Windows. With Microsoft's purchase of Fox. Pro in 1. 99. 2 and the incorporation of Fox's Rushmore query optimization routines into Access, Microsoft Access quickly became the dominant database for Windows - effectively eliminating the competition which failed to transition from the MS- DOS world. This was before Visual Basic. Bill Gates saw the prototypes and decided that the BASIC language component should be co- developed as a separate expandable application, a project called Thunder. The two projects were developed separately. Access was also the name of a communications program from Microsoft, meant to compete with Pro. Comm and other programs. This proved a failure and was dropped. Multiple backend sources can be used by a Microsoft Access Jet Database (ACCDB and MDB formats). Similarly, some applications such as Visual Basic, ASP. NET, or Visual Studio . NET will use the Microsoft Access database format for its tables and queries. Microsoft Access may also be part of a more complex solution, where it may be integrated with other technologies such as Microsoft Excel, Microsoft Outlook, Microsoft Word, Microsoft Power. Point and Active. X controls. Access tables support a variety of standard field types, indices, and referential integrity including cascadingupdates and deletes. Access also includes a queryinterface, forms to display and enter data, and reports for printing. The underlying Jet database, which contains these objects, is multi- user and handles record- locking. Repetitive tasks can be automated through macros with point- and- click options. It is also easy to place a database on a network and have multiple users share and update data without overwriting each other's work. Data is locked at the record level which is significantly different from Excel which locks the entire spreadsheet. There are template databases within the program and for download from Microsoft's website. These options are available upon starting Access and allow users to enhance a database with predefined tables, queries, forms, reports, and macros. Database templates support VBA code but Microsoft's templates do not include VBA code. Programmers can create solutions using VBA, which is similar to Visual Basic 6. VB6) and used throughout the Microsoft Office programs such as Excel, Word, Outlook and Power. Point. Most VB6 code, including the use of Windows API calls, can be used in VBA. Power users and developers can extend basic end- user solutions to a professional solution with advanced automation, data validation, error trapping, and multi- user support. The number of simultaneous users that can be supported depends on the amount of data, the tasks being performed, level of use, and application design. Generally accepted limits are solutions with 1 GB or less of data (Access supports up to 2 GB) and performs quite well with 1. This capability is often a good fit for department solutions. If using an Access database solution in a multi- user scenario, the application should be . This means that the tables are in one file called the back end (typically stored on a shared network folder) and the application components (forms, reports, queries, code, macros, linked tables) are in another file called the front end. The linked tables in the front end point to the back end file. Each user of the Access application would then receive his or her own copy of the front end file. Applications that run complex queries or analysis across large datasets would naturally require greater bandwidth and memory. Microsoft Access is designed to scale to support more data and users by linking to multiple Access databases or using a back- end database like Microsoft SQL Server. With the latter design, the amount of data and users can scale to enterprise- level solutions. Microsoft Access's role in web development prior to version 2. User interface features of Access, such as forms and reports, only work in Windows. In versions 2. 00. Access object type called Data Access Pages created publishable web pages. Data Access Pages are no longer supported. The Microsoft Jet Database Engine, core to Access, can be accessed through technologies such as ODBC or OLE DB. The data (i. e., tables and queries) can be accessed by web- based applications developed in ASP. NET, PHP, or Java. With the use of Microsoft's Terminal Services and Remote Desktop Application in Windows Server 2. R2, organizations can host Access applications so they can be run over the web. These web- based forms and reports run in any modern web browser. The resulting web forms and reports, when accessed via a web browser, don't require any add- ins or extensions (e. Active. X, Silverlight). Access 2. 01. 3 can create web applications directly in Share. Point 2. 01. 3 sites running Access Services. Access 2. 01. 3 web solutions store its data in an underlying SQL Server database which is much more scalable and robust than the Access 2. Share. Point lists to store its data. A compiled version of an Access database (File extensions: . MDE /ACCDE or . ADE; ACCDE only works with Access 2. An MDE or ADE file is a Microsoft Access database file with all modules compiled and all editable source code removed. Both the . MDE and . ADE versions of an Access database are used when end- user modifications are not allowed or when the application.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
September 2017
Categories |