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Thus a Client-server database system is not a requirement for using stored procedures or table triggers with Access 2010. Access 2010 includes table-level triggers and stored procedures built into the ACE data engine. Unlike client'server relational database management systems (RDBMS), Microsoft Access does not implement database triggers, stored procedures, or transaction logging. Microsoft Access is a file server-based database. Users can mix and use both VBA and "Macros" for programming forms and logic and offers object-oriented possibilities.
#VISUAL BASIC SCRIPT CODE#
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 functions.Īccess is compatible with SQL (structured query language), queries can be viewed graphically or edited as SQL statements, and SQL statements can be used directly in Macros and VBA Modules to manipulate Access tables. Access is supported by Visual Basic for Applications, an object-oriented programming language that can reference a variety of objects including DAO (Data Access Objects), ActiveX Data Objects, and many other ActiveX components.
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We can use Access to develop application software, or to build simple applications. It can also import or link directly to data stored in other applications and databases. Microsoft Office Access 2010 is a RDBMS that combines the relational Microsoft Jet Database Engine with a GUI and software-development tools.Īccess stores data in its own format based on the Access Jet Database Engine. In other words, we can't delete a row from a table if the foreign key of another table references the row. This determines whether cells in the column may contain text or numbers, and whether cells may be left empty or not.Īnother aspect of RDBMS, it requires that records referred in another table cannot be deleted unless the reference is the first deleted. They require each table to have a primary key column and permissible data types must be defined for all other columns. Normalization rules insist that data is organize efficiently, and without duplication or redundancy, in order to reduce the potential for anomaly during data operations. The SQL Server DataBase Management System (DBMS) that is bundled with Visual Basic takes the Relational DataBase Management Systems (RDBMS) like Oracle or IBM DB2. SQL provides mechanisms for most kinds of database manipulations. A table can be linked to another table using a foreign key. One of the keys is designated to be the primary key.
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Each table has at least one column, and each column has a type associated with it, which limits the type of data that can be stored in the column. Relational databases store data in tables, which consist of rows and columns. However, we still need to understand how relational databases work. For instance, Ruby on Rails abstracts all database access and makes most direct access unnecessary, as do component technologies such as Enterprise JavaBeans and lots of object-oriented frameworks. Many of them hide the complexities of the underlying data structures. There are tools available to help us create and manage databases. The script engine can be invoked either from within the Windows GUI or at a Command Prompt, or IE. Scripts written in VBScript are interpreted by a script engine that processes the instructions to execute the script. VBScript is a scripting language and it shares the same core VB language. ASP and VBScript should not be confused with ASP.NET which uses the. Although it resembles VB in syntax, it is a separate language and it is executed by vbscript.dll as opposed to the VB runtime. It can be used in Windows scripting and client-side web page scripting for IE. It is the default language for Active Server Pages (ASP).