To change data (perform an INSERT, UPDATE, or DELETE) you use the executeUpdate() method. This method is similar to the method executeQuery() used to issue a SELECT statement, but it doesn't return a ResultSet; instead it returns the number of rows affected by the INSERT, UPDATE, or DELETE statement. Example 31-3 illustrates the usage.
Example 31-3. Deleting Rows in JDBC
This example will issue a simple DELETE statement and print out the number of rows deleted.
int foovalue = 500; PreparedStatement st = db.prepareStatement("DELETE FROM mytable WHERE columnfoo = ?"); st.setInt(1, foovalue); int rowsDeleted = st.executeUpdate(); System.out.println(rowsDeleted + " rows deleted"); st.close();
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