When stmt.executeUpdate() method is called the following steps can be carried out

  1. The JDBC driver sends the sql statement to the database server.
  2. The database server parses the sql statement to analyze the wether the statement is correct or not.
  3. If the statement is correct the database server executes the statement.

Note: executeUpdate() method returns an integer indicating the number of rows effected by that statement.

Example:

 String sql="insert into employee values(100,'emp1','US')";
 Statement stmt=con.createStatement();
 int n=stmt.executeUpdate();

From the above code 1 will be returned, indicating that the statement is inserted one row into table.

Note:For create table, drop table and alter table executeUpdate() method returns 0