Count Records Using PreparedStatement : PreparedStatement « Database SQL JDBC « Java

1. Java
2. Database SQL JDBC
3. PreparedStatement

Count Records Using PreparedStatement

 
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();
      }
    }
  }
}

           
         
  

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