What is JDBC, and Why is it Important? The Java Database Connectivity, or JDBC, API enables Java programs to communicate with a variety of relational databases, including MySQL, Oracle, SQL Server, and others. It offers a standardized collection of classes and interfaces that let programmers carry out typical database tasks including data querying, record-inserting, information-updating, and running stored procedures.
The JDBC's Importance For example, finding books at a library without a card catalogue would be difficult, isn't it? Similar to a library card catalogue in the realm of computing, JDBC enables Java programs to access, retrieve, and modify data contained in databases.
The JDBC Components
There are five steps in JDBC:
Register the Driver class: You must register the correct database driver with JDBC before creating a database connection. The driver facilitates communication between Java and the database by serving as a bridge.
Create connection: Using the DriverManager.getConnection() function, you may connect to the database after registering the driver. To enable data flow between the Java program and the database, this step is crucial.
Statement creation: After the connection has been established, use the createStatement() or prepareStatement() methods to create a statement. You may use the statement object to run SQL queries on the database.
Execute SQL queries: With the statement in place, you can use the relevant execute methods of the statement object to carry out various SQL operations like SELECT, INSERT, UPDATE, and DELETE. Results from the queries are returned for further processing.
Close connection: In order to release resources and free up memory associated with the database, it is imperative to close the database connection using the close() method. Resource leaks may occur if the connection isn't properly closed.
Here, I have used MySQL database connectivity with the JAVA class by using these five steps of JDBC:
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