Getting the Number of Rows in a Database Table : MySQL « Database « Java Tutorial






import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;

public class Main {
  public static void main(String[] argv) throws Exception {
    String driverName = "com.jnetdirect.jsql.JSQLDriver";
    Class.forName(driverName);

    String serverName = "127.0.0.1";
    String portNumber = "1433";
    String mydatabase = serverName + ":" + portNumber;
    String url = "jdbc:JSQLConnect://" + mydatabase;
    String username = "username";
    String password = "password";

    Connection connection = DriverManager.getConnection(url, username, password);
    Statement stmt = connection.createStatement();
    ResultSet resultSet = stmt.executeQuery("SELECT COUNT(*) FROM my_table");

    // Get the number of rows from the result set
    resultSet.next();
    int rowcount = resultSet.getInt(1);
  }
}








20.34.MySQL
20.34.1.Get a MySQL Connection from the Driver Manager
20.34.2.JDBC Mysql Connection String
20.34.3.MySQL Connection Properties: Passing Additional Properties Using a Database URL
20.34.4.Keep the Connection Alive for MySQL
20.34.5.MySQL Data type to Java Data type Conversion Table
20.34.6.Create a MySQL Table to Store Java Types (Using Statement Objects)?
20.34.7.Retrieve Automatically Generated Keys Using a Statement (MySQL)?
20.34.8.Creating a MySQL Table to Store Java Types
20.34.9.Loading a Flat File to a MySQL Table, file is comma-separated
20.34.10.Loading a Flat File to a MySQL Table, file is terminated by \r\n, use this statement
20.34.11.Creating a Database in MySQL
20.34.12.Creating a MySQL Database Table to store Java Types
20.34.13.Deleting a Table from Database
20.34.14.Retrieving Tables from a Database
20.34.15.Inserting values in MySQL database table
20.34.16.Getting the Number of Rows in a Database Table
20.34.17.Updating a Row in a Database Table
20.34.18.Deleting All Rows from a Database Table
20.34.19.Exporting a MySQL Table to a Flat File
20.34.20.Retrieve auto-generated keys
20.34.21.MySQL Error code and message