Explain the difference between the executeQuery() and executeUpdate() methods in JDBC.

Explanation of the difference between executeQuery() and executeUpdate() methods in JDBC

When working with JDBC, it is important to understand the difference between the executeQuery() and executeUpdate() methods. Both methods are used to interact with a database, but they serve different purposes and have different return types.

executeQuery()

The executeQuery() method is used to execute a SELECT SQL query that retrieves data from the database. When this method is called, it returns a ResultSet object containing the data retrieved from the database. This method is typically used for SELECT statements that retrieve data.

executeUpdate()

The executeUpdate() method is used to execute SQL queries that modify the database, such as INSERT, UPDATE, or DELETE statements. When this method is called, it returns an integer value representing the number of rows affected by the query. This method is typically used for SQL statements that do not return data, but instead modify the database.

In summary, the executeQuery() method is used for SELECT queries that retrieve data, while the executeUpdate() method is used for modifying the database with INSERT, UPDATE, or DELETE statements.

It is important to use the appropriate method based on the type of SQL query being executed, to ensure proper interaction with the database and handling of the data.