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Microsoft Office Access (formerly known as Microsoft Access) is released by Microsoft relational database management system. It combines the Microsoft Jet Database Engine,
air force 1 shoes, and two graphical user interface features, is a member of Microsoft Office. In fact, Microsoft Access is the name of another communications program, like with ProComm and other similar programs to compete. However, Microsoft later confirmed that this is a failed program, and will it stop. A few years later they renamed the name of the database software. In addition, Access, or c language, a function name and a switch trunk modes.
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Database release level test characteristics of the historical advantages and disadvantages of the main uses of the advantages ACCESS Access Access database security shortcomings of a mode, the password type II, Open Access asa type other sense the importance of promoting the power of open access open access open access to the major impact of the main problems the function name describes the main road model C Grade Test Access database in 2000, when he became a Computer Grade Exam A second computer database language and because it's easy to learn and easy to use is gradually replacing traditional VFP as two of the most popular database language.
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About Access Microsoft launched a Windows-based desktop relational database management system (RDBMS, or Relational Database Management System),
nike air force 1, is one of the Office family application. It provides tables, queries, forms, reports, pages, macros, modules, 7 kinds of objects used to create the database system; offers a variety of wizards, generators, templates, the data storage, data query, interface design, report generation and other standardized operation; to establish a fully functional database management system provides a convenient and also allows ordinary users do not write code, you can complete most of the data management tasks. Access can access Access / Jet, Microsoft SQL Server, Oracle (Oracle software company), or any ODBC-compliant database information. Skilled software designers and data analysts use it to develop application software, and some unskilled programmers and non-programmers Although it supports some object-oriented (OO) technology, but failed to become a complete object-oriented development tools. History of Microsoft Access 1.0 version released in the November 1992 release.
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Microsoft's minimum requirements specified in its system, together with four megabytes for Windows 3.0 section of memory. Section 6 trillion least 8 megabytes of memory section coupled with hard disk space (recommended 14 MB section of the best hard disk space) is the recommended system requirements. Software was 1.44 trillion in section 7 floppy release carrier. The software can effectively handle large numbers of records, but tests have shown, in some cases, lead to data corruption. For example, the file size exceeds 700MB often go wrong. (It is worth noting that in version 1.0 when most widely used is less than 700MB of hard disk.) Guidelines state that the use of outdated software, device drivers and configuration errors can cause data loss. Access the first name is Cirrus. It was developed in Visual Basic before the window of the engine was called Ruby. Bill Gates saw the prototype of Ruby after the decision to the component-based Basic language can be extended as a separate joint development of applications and Access. The project is called Thunder. The two projects are independent of the window as the underlying engine developed and are not compatible. However, in VBA appears they are combined. The end of 1995, access 95 release, which is the world's first 32-bit relational database management systems, making access to applications by the popularity and continued development. In 1997, access 97 release. Its biggest feature is the access the database began to support web technology, this technology development, opening up the access the database from the desktop to the network development. The early 21st century, microsoft released access2000, which is Microsoft's powerful desktop database management system of the sixth generation, is 32-bit access to the third version. Thus, access relational database in the desktop area of the popularity has leapt to a new level. Microsoft officially released the 2003 access 2003, this is the second after 2002 to the latest version, which inherited the previous version of advantages, but also added a number of Microsoft Access applications using the main function is widely used in many places, such as small enterprises, departments of large companies, and developers like programming expertise to use it to create a desktop data processing system. It is also often used to develop a simple WEB application. These applications take advantage of ASP is running in Internet Information Services. WEB application more complex, use PHP / MySQL or ASP / Microsoft SQL Server. Its ease of use and powerful design tools provide many features for beginner programmers. However, this ease of use may be misleading. Such developers are not in the application or data design training office employees. So many people think that developers can create a usable system, but there are a lot of people think that the limitations of the tool itself had such a misleading. Some professional application developers use Access for rapid application development, especially to the salesman on the street or make a separate application the early-type tool. However, if access to data through the network, then, Access can be extended caving is not high. So when the program is more users, they tend more and more choices will be some client - server-based programs, such as Oracle, DB2, Microsoft SQL Server, Windows SharePoint Services, PostgreSQL, MySQL, Alpha Five, MaxDB or Filemaker. In any case, the function of many Access (forms, reports, sequence and VB code) can be later used for other database applications, including JET (file-based database engine, Access defaults to), Microsoft SQL Server, Oracle, and any other ODBC-compatible with the product. This approach allows developers to a mature application of data to move to a more powerful server and not have in place the expense of development. Many developers who use Microsoft Access Leszynski naming convention, although this is not universal; it is a program the General Assembly, not a DBMS implementation of the regulations. Characteristics of a good programmer to enter from the perspective of its compatibility with SQL-related question could be viewed and edited as SQL statements and SQL statements directly in the VBA macro view and use the operating mode can be entered in the table. Users may mix and use both VBA and the
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Import and Export report generation process, then have the ability and the complexity of the task to create the report, no other popular database report generator program is full of character and strong - Crystal Report. MSDE (Microsoft SQL Server Desktop Engine) 2000, pocket-sized version of the MSSQL Server 2000, are included the Office XP Developer Edition and is used to access the outside may be used as an alternative than JET database engine. (As soon as possible * version of MSDE, and Microsoft Exchange servers to use this jet engine is actually handling large amounts of data and place a great family of software products and to make contributions should not be disrespectful, especially on Oracle and Microsoft SQL server). Give access to windows and other platforms and applications with the integration of the various features of the import and exit doors together and, upon request from the application or manually by the user inside several of them can be executed. For example, a very close SNP to share fully formatted form and not all people who enter the software report. It can also easily be upgraded to Microsoft SQL Server. Completely different from general RDBMS, it lacks the database triggers and stored procedures. Since MS Access 2000 (Jet 4.0), developers can set parameters in the query, which is very similar with the stored procedure, but these When data changes within the table, it does allow the form that contains the code to be triggered, using a common technology through queries and other operations into the RDBMS stored procedures in terms of support for these. Into the programming language available, then the product in another Microsoft Office furniture, Microsoft applications, Visual Basic. COM library database into two components of information are provided: this legacy data access objects (DAO), with entry and only provides a new ActiveX Data Objects (hectic). MicrosoftAccess easily be applied to small project, but if the design is not good for large projects are useless. All database query, form, and reports are stored in the database, and the ideal model and related coordination, not with them to make a physical possibility of a hierarchical organization. A design technique is applied to the data and programs into between the distribution. A database should contain only tables and relationships, while another will have all the plans, forms, reports, and questioned the table and on the first database connection. Unfortunately, when the links, not on the road to allow access, so that the development environment as a production environment this should be the same way (although you can write your own that can be on the back end of the file to search through the directory tree, if it is found that this current path it can not.) This technology also allows developers to carve in a different file an application, so some structure is possible. Access advantages and disadvantages of the advantages of (1) storage is simple, easy maintenance and management of Access Manager objects are tables, queries, forms, reports, pages, macros and modules, these objects are stored in the suffix (. Mdb or. Accdb) database file, user-friendly operation and management. (2) Access is an object-oriented object-oriented development tools, the use of object-oriented database system in the way various features of the object, the database management functions encapsulated in various types of objects. An application system as it is composed of a series of objects for each object it defines a set of methods and properties to define the behavior of the object and foreign, users can also expand as needed to the object methods and properties. By object methods, properties, operations and management to complete the database, greatly simplifying the user's development. At the same time, this approach based on object-oriented development, making application development easier. (3) friendly interface, easy operation is a visual tool for Access, is exactly the same style and Windows users want to generate objects and applications, just use the mouse to drag and drop can be very easy and intuitive. System also provides a table generator, Query Builder, Report Designer and the Database Wizard, Table Wizard, Query Wizard, Form Wizard, Report Wizard and other tools that allow simple, easy to use and master. (4) integrated environment, handling multiple data Access Windows-based operating system under the integrated development environment that integrates a variety of wizards and generation tool, which greatly improves developer productivity, making the establishment of a database, create table designed user interface, design data query, reporting,
nike air force one low, printing, etc. can easily and orderly manner. (5) Access supports ODBC (development of database connectivity, Open Data Base Connectivity), using Access Powerful DDE (Dynamic Data Exchange) and OLE (object connectivity and embedded) features, can be embedded in a data table, bitmaps, sounds, , Excel tables, Word documents, you can create dynamic database reports and forms and so on. Access can also be used in network programs, and dynamic data on the network to link the. Generate database access page using the object HTML file, easy to build Internet / Intranet applications. (6) supports a wide range, easy to expand, greater flexibility to the way the table will link to open the EXCEL file, formatted text documents, so that you can use the database in which the high efficiency of data query processing. You can also order Access as a front by the client to SQL Server as the backend database (eg, the ADP) development of large-scale database applications. In short, Access is only used to store data in both the database and also as a client development tool for database application systems development; that can develop a small easy to use software can also be used to develop large-scale applications. The disadvantage ACCESS ACCESS is a small database, since it had its limitations of small (below performance disadvantage on using Access as the database refers only to the case, not including using Access as the client front, with SQL Server as the backend database situation): 1. The database is too large, generally more than a hundred M (pure data, not including forms, reports and other client objects) performance will be worse. 2. Although theoretically support 255 concurrent users, but in fact did not so much support, if the read-only access at about 100 users or so, and if it is concurrent editing, then in about 10-20 users. 3. Records the number of excessive number of records in a single table will become worse performance than a million, if coupled with poorly designed, this limit also decreased. 4. Can not be compiled into an executable file (. Exe), must be installed to use Access runtime environment. Access database for a safe manner, type the password to the database name from a random complex, to avoid being guessed is downloaded, this approach is very popular in the past, because we are confident of their own code. However, with the error led to the disclosure of the database address database is illegal downloading, this approach also used less and less people. Second, the access and not access #. mdb, it will prompt can not find the file, but unfortunately, URL special characters in these will have a special representation, a special that is% # 23,
air force 1 high, then the access #. mdb will be downloaded. If there is like FlashGet to download tools can be downloaded directly. Third, ASP-style This approach is more professional but also very safe approach is now more popular, but now many people only made half, but the data were changed and the ASP,
air force one high, so directly like FlashGet Download the tool can still download the database, the correct approach in this way has two steps: first step: to create a field in the database, the name at random, the type is OLE object, the content type is set to single-byte % The database will be prompted to direct request placed inside a directory and database to run a bit on it. Under the code number of text: # include int file_exists (char * filename); int main (void) {printf ((, a switch trunk modes. 2 switches between the two ports are able to establish trunk connections, depending on the combination of two-port model. There are common (ordinary) access (roads) Trunk (adaptive) Dynamic-auto (expect) Dynamic-desirable term for more Atlas Atlas Reference 1
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