Working with Statements
CityBook Libraries wants to query their books table. To execute SQL queries in JDBC, you need to create a Statement object from your connection, then use it to run queries and get results.
The database credentials are preloaded in the Credentials class, and all necessary imports (Connection, DriverManager, SQLException, Statement, ResultSet) are available.
Este exercício faz parte do curso
Querying a PostgreSQL Database in Java
Instruções do exercício
- Create a
Statementfrom the connection. - Execute the query using the
Statementto get aResultSet.
Exercício interativo prático
Experimente este exercício completando este código de exemplo.
public class Main {
public static void main(String[] args) throws SQLException {
// Create statement and execute query
try (Connection conn = DriverManager.getConnection(Credentials.URL, Credentials.USER, Credentials.PASSWORD);
Statement stmt = conn.____();
ResultSet rs = ____.____("SELECT * FROM books")) {
System.out.println("Query Executed!");
}
}
}