CountRecordsUsingPreparedStatement.java Source code

Introduction

Here is the source code for CountRecordsUsingPreparedStatement.java

Source

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class CountRecordsUsingPreparedStatement {
    public static Connection getConnection() throws Exception {
        String driver = "oracle.jdbc.driver.OracleDriver";
        String url = "jdbc:oracle:thin:@localhost:1521:databaseName";
        String username = "name";
        String password = "password";
        Class.forName(driver);
        Connection conn = DriverManager.getConnection(url, username, password);
        return conn;
    }

    public static void main(String[] args) {
        ResultSet rs = null;
        Connection conn = null;
        PreparedStatement pstmt = null;
        try {
            conn = getConnection();
            String query = "select count(*) from tableName";
            pstmt = conn.prepareStatement(query);
            rs = pstmt.executeQuery();
            if (rs.next()) {
                int numberOfRows = rs.getInt(1);
                System.out.println("numberOfRows= " + numberOfRows);
            } else {
                System.out.println("error: could not get the record counts");
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                rs.close();
                pstmt.close();
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}