Sum of Column in a Database Table
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 {
int sum = 0;
Class.forName("com.mysql.jdbc.Driver");
Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/jdbctutorial",
"root", "root");
Statement st = con.createStatement();
ResultSet res = st.executeQuery("SELECT SUM(col) FROM mytable");
while (res.next()) {
int c = res.getInt(1);
sum = sum + c;
}
System.out.println("Sum of column = " + sum);
}
}
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