Retrieving All Rows from a Database Table

Here, you will learn how to retrieve all rows from a database table. You know that table contains the data in rows and columns format.

Retrieving All Rows from a Database Table

Retrieving All Rows from a Database Table

     

Here, you will learn how to retrieve all rows from a database table. You know that table contains the data in rows and columns format. If you want to access the data from a table then you need to use some APIs and methods. See brief descriptions for retrieving all rows from a database table as below:

Description of program:

Program establishes the connection between MySQL database and java file so that the we can retrieve all data from a specific database table. If any exception occurs then shows a message "SQL code does not execute.".

Description of code:

executeQuery(String sql):
This method executes the SQL statement and returns a single ResultSet object. It takes string type parameter for executing the SQL statement.

SELECT * FROM table_name:
Above code retrieves all data from specific database table.

getInt(String column_name):
This method is of  java.sql.ResultSet interface that takes string type parameter and returns an integer type values.

getString(String column_name):
This method is same as getInt() method but it returns the string type values.

Here is the code of program:

import java.sql.*;

public class GetAllRows{
  public static void main(String[] args) {
  System.out.println("Getting All Rows from a table!");
  Connection con = null;
  String url = "jdbc:mysql://localhost:3306/";
  String db = "jdbctutorial";
  String driver = "com.mysql.jdbc.Driver";
  String user = "root";
  String pass = "root";
  try{
  Class.forName(driver).newInstance();
  con = DriverManager.getConnection(url+db, user, pass);
  try{
  Statement st = con.createStatement();
  ResultSet res = st.executeQuery("SELECT * FROM  employee6");
  System.out.println("Emp_code: " "\t" "Emp_name: ");
  while (res.next()) {
  int i = res.getInt("Emp_code");
  String s = res.getString("Emp_name");
  System.out.println(i + "\t\t" + s);
  }
  con.close();
  }
  catch (SQLException s){
  System.out.println("SQL code does not execute.");
  }  
  }
  catch (Exception e){
  e.printStackTrace();
  }
  }
}

Output of program:

C:\vinod\jdbc\jdbc-mysql>java GetAllRows
Getting All Rows from a table!
Emp_code:   Emp_name:
10  vinod
11  Amar
15  Aman
   sushil

Download this example.

Tutorials

  1. Mapping MySQL Data Types in Java
  2. Connecting to a MySQL Database in Java
  3. Creating a Database in MySQL
  4. Creating a Database Table
  5. Creating a MySQL Database Table to store Java Types
  6. Description of Database Table
  7. Deleting a Table from Database
  8. Retrieving Tables from a Database
  9. Inserting values in MySQL database table
  10. Retrieving All Rows from a Database Table
  11. Adding a New Column Name in Database Table
  12. Change Column Name of a Table
  13. Make Unique Column in Database Table
  14. Remove Unique Column in Database Table
  15. Arrange a Column of Database Table
  16. Arrange a Column of Database Table
  17. Sum of Column in a Database Table
  18. Deleting All Rows from a Database Table
  19. Delete a Specific Row from a Database Table
  20. Delete a Column from a Database Table
  21. Join tables in the specific database
  22. Join tables with the NATURAL LEFT JOIN operation
  23. Join tables with the NATURAL RIGHT JOIN operation
  24. Cross Join Tables in a Specific Database
  25. Prepared Statement Set Object
  26. Statement Batch Update
  27. Prepared Statement With Batch Update
  28. Select Records Using Prepared Statement
  29. Update Records using Prepared Statement
  30. Inserting Records using the Prepared Statement
  31. Count Records using the Prepared Statement
  32. Deleting Records using the Prepared Statement
  33. Using the Prepared Statement Twice
  34. Set Data Types by using Prepared Statement
  35. Set byte, short and long data types by using the Prepared Statement
  36. Prepared Statement Set Big Decimal
  37. Set Date by using the Prepared Statement
  38. Set Time by using the Prepared Statement
  39. Set Timestamp by using the Prepared Statement
  40. Copy Table in a MySQL Database