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Database connections are finite and expensive and can take a disproportionately long time to create relative to the operations performed on them. It is inefficient for an application to create, use, and close a database connection whenever it needs to update a database. Connection pooling is a technique designed to alleviate this problem. A ...
DriverManager is used as a Connection factory for creating JDBC connections. JDBC connections support creating and executing statements. JDBC connections support update statements such as SQL's CREATE, INSERT, UPDATE and DELETE, or query statements such as SELECT. Additionally, stored procedures may be invoked through a JDBC connection.
Improper handling of connections can lead to bottlenecks and operational inefficiencies. Connection pooling behavior varies across compute platforms: [8] [9] [10] Function-as-a-Service (FaaS): AWS Lambda creates new database connections per invocation, which can cause connection storms under high concurrency if unmanaged. Solutions like Amazon ...
Software (e.g., Crystal Reports, Microsoft Excel, PHP, Perl, Python, Ruby) users can submit CRUD (Create, Read, Update, Delete) queries to a data source by establishing a connection to the DSN. ASP ( VBScript ) code to open a DSN connection might look like the following:
This reduces the overhead of creating fresh connections every time one is required, as unused connections are cached and ready to be reused. Unlike the MySQL extension, MySQLi does not provide a separate function for opening persistent connections. To open a persistent connection you must prepend p: to the hostname when connecting.
Each Federated table that is defined there is one .frm (data definition file containing information such as the URL of the data source). The actual data can exist on a local or remote MySQL instance. To create a Federated table, one has to specify a URL in the "CONNECTION" string:
DSNs collect additional information needed to connect to a specific data source, versus the DBMS itself. For instance, the same MySQL driver can be used to connect to any MySQL server, but the connection information to connect to a local private server is different from the information needed to connect to an internet-hosted public server. The ...
In computing, a connection string is a string that specifies information about a data source and the means of connecting to it. It is passed in code to an underlying driver or provider in order to initiate the connection. Whilst commonly used for a database connection, the data source could also be a spreadsheet or text file.