Deleting Records using the Prepared Statement

This section helps us for deleting the records from the database table by using the PreparedStatement interface of the java.sql package.

Deleting Records using the Prepared Statement

Deleting Records using the Prepared Statement

     

This section helps us for deleting the records from the database table by using the PreparedStatement interface of the java.sql package. Sometimes, some records we have entered becomes useless after sometime so we need to delete those records. We can do it very easily by using the simple Sql query. The given example provides the facility for deleting the records from the database table. Brief description below: Please go through this example very carefully.

Description of program:

In this program we are going to delete the records from the 'movies' table that released in the year 1985. For this, first of all we will establish the connection with MySQL database by using the JDBC driver. After establishing the connection we will pass the SQL statement in the prepareStatemet method which returns the PreparedStatement object and we will set the releases year of movies in the setInt method by using the PreparedStatement object. If it records gets delete then the executeUpdate method will return the number of deleted records. This method will execute the SQL statement that may be INSERT, UPDATE or DELETE statement. If any problems arises with SQL statement then it will display a message  "SQL statement is not executed!".

Here is the code of program:

import java.sql.*;

public class DeleteRecords{
  public static void main(String[] args) {
  System.out.println("Delete records example using prepared statement!");
  Connection con = null;
  try{
  Class.forName("com.mysql.jdbc.Driver");
  con = DriverManager.getConnection
("jdbc:mysql://localhost:3306/jdbctutorial","root","root");
  try{
  String sql = "DELETE FROM movies where year_made = ?";
  PreparedStatement prest = con.prepareStatement(sql);
  prest.setInt(1,1985);
  int del = prest.executeUpdate();
  System.out.println("Number of deleted records: " + del);
  con.close();
  }
  catch (SQLException s){
  System.out.println("SQL statement is not executed!");
  }
  }
  catch (Exception e){
  e.printStackTrace();
  }
  }
} 

Download this program:

Database Table: movies

title year_made
alam ara 1945
Bagal bali 2002
Karan 1996
Bagban 2003
Kuch kuch hota hi 1985
Ham hi tumahare sanam 1985

Output of the program:

C:\vinod\jdbc\jdbc\PreparedStatement>javac DeleteRecords.java

C:\vinod\jdbc\jdbc\PreparedStatement>java DeleteRecords
Delete records example using prepared statement!
Number of deleted records: 2

After executing the program:

Database Table: movies

title year_made
alam ara 1945
Bagal bali 2002
Karan 1996
Bagban 2003

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