JDBC

JDBC/src/jdbcassignment/FetchingRecords.java

+package jdbcassignment;
+import  java.sql.*;
+public class FetchingRecords {
+    public static void main(String [] args) throws Exception {
+
+        Connection connection = null;
+        Statement statement = null;
+        ResultSet resultSet = null;
+
+        String url = "jdbc.mysql://localhost:3306/firstDBPractice";
+        String userName = "root";
+        String mysqlPassword = "nisum123";
+
+        try {
+            Class.forName("com.mysql.jdbc.Driver").newInstance();
+            connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/firstDBPractice","root","nisum123");
+            statement = connection.createStatement();
+            resultSet = statement.executeQuery("select * from Employee");
+
+            while(resultSet.next()){
+                System.out.print(resultSet.getInt(  "emp_id")+"   "+resultSet.getString(  "emp_name")+"  "+resultSet.getString(  "emp_address")
+                        + " " + resultSet.getString("emp_design") + " "+ resultSet.getString("emp_email") + " " + resultSet.getString("password"));
+                System.out.println();
+            }
+
+        }   catch (Exception e){
+            System.out.println(e.getMessage());
+        }
+    }
+}

JDBC/src/jdbcassignment/RetrieveStudentDataFromConsole.java

+package jdbcassignment;
+import java.sql.*;
+import java.util.Scanner;
+public class RetrieveStudentDataFromConsole {
+    public static void main (String [] args) throws  Exception{
+
+        Scanner sc = new Scanner(System.in);
+
+        Connection connection=null;
+        Statement statement =null;
+        ResultSet resultSet = null;
+
+        String url ="jdbc.mysql://localhost:3306/firstDBPractice";
+        String userName="root";
+        String mysqlPassword ="nisum123";
+
+        System.out.print("Enter Your Name Here .... ");
+        String name = sc.nextLine();
+        System.out.print("Enter Your Roll No ................");
+        String roll_no = sc.nextLine();
+
+        try {
+            Class.forName("com.mysql.jdbc.Driver").newInstance();
+            connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/firstDBPractice","root","nisum123");
+            statement = connection.createStatement();
+            resultSet = statement.executeQuery("select * from Employee");
+
+            while(resultSet.next()){
+                if(resultSet.getString("emp_name").equals(name) || resultSet.getString("emp_id").equals(roll_no)){
+                    System.out.println("Your Name is  ----- Mr "  + name + " And Your id Is ------ " + roll_no);
+                }
+            }
+
+        }
+        catch (Exception e){
+            System.out.println(e.getMessage());
+        }
+    }
+}

JDBC/src/jdbcassignment/TakesRollNoFromConsol.java

+package jdbcassignment;
+import java.sql.DriverManager;
+import java.sql.Connection;
+import  java.sql.Statement;
+import java.sql.ResultSet;
+import  java.util.Scanner;
+public class TakesRollNoFromConsol {
+    public static void main(String [] args) throws  Exception {
+        Scanner sc = new Scanner(System.in);
+        System.out.print("Enter Your Roll NO Here ---- >  ");
+        String rollNo = sc.nextLine();
+    Connection connection = null;
+    Statement statement   = null;
+    ResultSet resultSet   = null;
+
+        String url ="jdbc.mysql://localhost:3306/firstDBPractice";
+        String userName="root";
+        String nysqlPassword ="nisum123";
+
+    try {
+       Class.forName("com.mysql.jdbc.Driver").newInstance();
+       connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/firstDBPractice", "root", "nisum123");
+
+       statement = connection.createStatement();
+       resultSet = statement.executeQuery("SELECT student.student_id , student.student_name , course.course_id, course.course_name FROM student inner join course on course.course_id=student.course_id;");
+
+       while( resultSet.next()){
+            if (resultSet.getString("student_id").equals(rollNo)){
+           System.out.println(resultSet.getString("student_id") + " " + resultSet.getString("student_name") +  " " + resultSet.getString("course_name") );
+       }
+       }
+    }catch (Exception e){
+        System.out.println(e.getMessage());
+    }
+     }
+}