java.sql(JDBC)

The PreparedStatement interface belongs to the java.sql package and is used to execute parameterized SQL statements. It extends the Statement interface and allows SQL statements to be precompiled by the database. It uses the ? placeholder to represent values that are supplied later. The setXXX() methods are used to assign values to these placeholders. PreparedStatement […]

The Statement interface belongs to the java.sql package and is used to execute SQL statements from a Java application. A Statement object is created using the createStatement() method of the Connection interface. It can execute SQL commands such as SELECT, INSERT, UPDATE, and DELETE. The executeQuery() method is generally used for SELECT statements, while executeUpdate()

Connection properties are settings used to control how a Java application connects to and communicates with a database. In JDBC, these properties can be provided through the JDBC URL, a Properties object, or a DataSource. They can specify information such as the database username, password, connection timeout, SSL usage, character encoding, and auto-commit behavior. Properly

A Connection Pool is a collection of reusable database connections that avoids creating a new connection for every request. The DataSource interface provides a standard way to obtain database connections. Using a connection pool improves performance by reusing existing connections instead of repeatedly opening and closing them. This approach is commonly used in enterprise JDBC

Establishing a connection to a database is the first major step in JDBC programming. It allows a Java application to communicate with a database and perform operations such as executing SQL queries, inserting records, updating data, and retrieving results. JDBC provides the Connection interface and DriverManager class to establish and manage database connections. A connection

The DataSource interface belongs to the javax.sql package and provides an alternative to DriverManager for establishing database connections. It is commonly used in enterprise applications because it supports features such as connection pooling and easier database configuration. Methods of DataSource Interface Methods public Connection getConnection() throws SQLException Establishes a connection to the database using the

The Connection interface belongs to the java.sql package and represents a connection between a Java application and a database. It provides methods for creating Statement, PreparedStatement, and CallableStatement objects. It is also used to manage database transactions such as commit, rollback, and savepoints. A Connection object is normally obtained using DriverManager.getConnection(). After completing database operations,

The DriverManager class in the java.sql package provides the getConnection() method to establish a connection between a Java application and a database. There are three commonly used overloaded forms of getConnection(). 1. Using getConnection(String url) This method establishes a database connection using only the JDBC URL. The username and password must be handled through the

The DriverManager class belongs to the java.sql package and is responsible for managing JDBC drivers. It acts as an important component between a Java application and the JDBC drivers. The DriverManager selects an appropriate JDBC driver based on the database URL provided by the application. It is mainly used to establish a connection with a

A JDBC Driver is a software component that enables a Java application to communicate with a specific database. It acts as a bridge between the JDBC API and the database by converting JDBC calls into database-specific commands. Different databases may require different JDBC drivers. Types of JDBC Drivers: There are four types of JDBC drivers: