In this tutorial we will learn how to Execute DELETE query(DML command) using PreparedStatement's addBatch() and executeBatch() methods in java JDBC.
java.sql.Statement's addBatch() method can be used for executing Batch statements in java jdbc.
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--Before executing java program execute these database scripts >
create table EMPLOYEE(ID number(4),NAME varchar2(22));
insert into EMPLOYEE values(7, 'ankit');
insert into EMPLOYEE values(8, 'rohit');
commit;
--If table already exists then execute the DROP command >
drop table EMPLOYEE;
Before execution of below program EMPLOYEE table will look like this >
After execution of below program EMPLOYEE table will look like this >
Example/ Full Programs JDBC- Batch PreparedStatement - Execute DELETE query using PreparedStatement's executeUpdate method in java
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
/** Copyright (c), AnkitMittal JavaMadeSoEasy.com */
public class PreparedStatementDeleteExample {
public static void main(String... arg) {
Connection con = null;
PreparedStatement prepStmt = null;
try {
// registering Oracle driver class
Class.forName("oracle.jdbc.driver.OracleDriver");
// getting connection
con = DriverManager.getConnection(
"jdbc:oracle:thin:@localhost:1521:orcl",
"ankit", "Oracle123");
System.out.println("Connection established successfully!");
con.setAutoCommit(false); //Now, transactions won't be committed automatically.
prepStmt = con.prepareStatement("DELETE from EMPLOYEE where ID=? ");
//1) add set of parameters in PreparedStatement's object - BATCH of commands
prepStmt.setInt(1, 7); //substitute first occurrence of ? with 7
prepStmt.addBatch();
//2) add set of parameters in PreparedStatement's object - BATCH of commands
prepStmt.setInt(1, 8); //substitute first occurrence of ? with 8
prepStmt.addBatch();
//Execute PreparedStatement batch
prepStmt.executeBatch();
System.out.println("PreparedStatement Batch executed, DELETE done");
con.commit(); //commit all the transactions
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
finally{
try {
if(prepStmt!=null) prepStmt.close(); //close PreparedStatement
if(con!=null) con.close(); // close connection
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
/*OUTPUT
Connection established successfully!
PreparedStatement Batch executed, DELETE done
*/
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In this tutorial we learned how to Execute DELETE query(DML command) using PreparedStatement's addBatch() and executeBatch() methods in java JDBC.
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