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A Database Connection is the method in computer science that allows client software to talk to database server software, whether these exist on the same machine or not. A connection is required to send commands and receive answers, usually in the form of a result set. Computer scaence, or computing science, is the study of the theoretical foundations of information and computation and their implementation and application in computer systems. ...
In computing, a client is a system that accesses a (remote) service on another computer by some kind of network. ...
In computing , a database can be defined as a structured collection of records or data that is stored in a computer so that a program can consult it to answer queries. ...
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Connections are a key concept in data-centric programming, so much so that connection pooling was invented to simplify the process and improve performance. No command can be performed against a database without an "open and available" connection to it. A Connection Pool is a cache of database connections maintained in the databases memory so that the connections can be reused when the database receives future requests for data. ...
Connections are built by supplying an underlying driver or provider with a connection string, which is a way of addressing a specific database or server. ( Example: Server=sql_box;Database=Common;User ID=uid;Pwd=password; ) Once a connection has been built, it can be opened and closed at will, and properties ( such as the command timeout length, or transaction, if one exists ) can be set. Windows XP loading drivers during a Safe Mode bootup A device driver, or a software driver is a specific type of computer software, typically developed to allow interaction with hardware devices. ...
Provider may refer to: Provider model, a design pattern originally developed by Microsoft for use in the . ...
In computing , a database can be defined as a structured collection of records or data that is stored in a computer so that a program can consult it to answer queries. ...
Look up server in Wiktionary, the free dictionary. ...
A transaction is an agreement, communication, or movement carried out between separate entities or objects. ...
Many databases ( such as SQL Server 2000 ) only allow one operation at a time to be performed on a connection. In other words, if a request for data ( a SQL Select statement ) is sent to the database, and a result set is returned, the connection is open, but not available, until the client finishes consuming the result set. Other databases don't impose this limitation. SQL Server 2000 is Microsoft enterprise-scale relational database and member of the . ...
The related Category:SQL statements has been nominated for deletion, merging, or renaming. ...
A SELECT statement in SQL returns a result set of records from one or more tables. ...
Pooling
Connection Pooling is a technology that was invented to improve performance of the client application and remove stress from the database server. Because connections are finite and expensive and can take a disproportionately long time to create, modern applications send a connection back to the pool when they finish with it, and take a connection from the pool when one is needed, if one is available. A Connection Pool is a cache of database connections maintained in the databases memory so that the connections can be reused when the database receives future requests for data. ...
In mathematics, a set is called finite if and only if there is a bijection between the set and some set of the form {1, 2, ..., n} where is a natural number. ...
This encourages the practice of opening a connection only when needed, and closing it as soon as the work is done, instead of an application holding a connection open during the entire course of its life. In this manner, a relatively small no.. of connections can service a large number of requests - often called multiplexing. In telecommunications, multiplexing (also muxing or MUXing) is the combining of two or more information channels onto a common transmission medium using hardware called a multiplexer or (MUX). ...
References - IDbConnection Interface on MSDN
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