Delete a Specific Row from a Database Table

Here is an example with code which provides the facility for deleting specific row in a database table.

Delete a Specific Row from a Database Table

Delete a Specific Row from a Database Table

     

Consider a case where we are creating a table and we have to add some data in it. It may happen that we might add a wrong data in a row, now we need to delete that wrong data. This can be done very easily, and in this section we are going to do the same that is, how to delete a specific row from a specific database table. Here is an example with code which provides the facility for deleting specific row in a database table. Sometimes, you want to delete a specific row then you use some java methods and APIs interfaces. Detail information given below:

Description of program:

Firstly, in this program we are going to establish the connection by using MySQL database. After establishing the connection we are going to delete a specific row from the table. If the row get deletes successfully then it will shows an appropriate message: "Row is deleted.". If the row doesn't gets deleted then displays a message: "Row is not deleted". If there arises any problem while establishing the connection or there doesn't exist the table by that name or there is no data in the table then the exception will be thrown that "SQL statement is not executed". If any problems occurs while making connection then system displays a message with the help of java.lang.ClassNotFoundException exception.

Description of code:

DELETE FROM employee6 WHERE Emp_code = '1':
Above code deletes the record in the employee6 table which has Emp_code = '1'.
  employee6: This is a table name of a specific database.
  Emp_code: It specifies the column name of a specific database table.
  '1': This is the value of specified column name.

Here is the code of program:

import java.sql.*;

public class DeleteSpecificRow{
  public static void main(String[] args) {
  System.out.println("An example for Deleting a Row from a Database!");
  Connection con = null;
  String url = "jdbc:mysql://localhost:3306/";
  String driver = "com.mysql.jdbc.Driver";
  String db = "jdbctutorial";
  try{
  Class.forName(driver);
  con = DriverManager.getConnection(url+db, "root", "root");
  try{
  Statement st = con.createStatement();
  String sql = "DELETE FROM employee6 WHERE Emp_code = '1'";
  int delete = st.executeUpdate(sql);
  if(delete == 1){
  System.out.println("Row is deleted.");
  }
  else{
  System.out.println("Row is not deleted.");
  }
  }
  catch (SQLException s){
  System.out.println("SQL statement is not executed!");
  }
  }
  catch (Exception e){
  e.printStackTrace();
  }
  }
}

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