public void insert(Client client) throws SQLException {
String firstName = client.getFitstName();
String secondName = client.getSecondName();
String email = client.getEmail();
PreparedStatement ps =
OracleConnection.getConnection().prepareStatement("INSERT into Client VALUES ? ,? ,? ");
ps.setString(1, firstName);
ps.setString(2, secondName);
ps.setString(3, email);
ps.executeQuery();
}
public void delete(Client client) throws SQLException {
String firstName = client.getFitstName();
String secondName = client.getSecondName();
PreparedStatement ps =
OracleConnection.getConnection()
.prepareStatement(
"SELECT * FROM client c, good_order o WHERE c.first_name = ? and c.second_name =? join on (c.id=o.client_id)");
ps.setString(1, firstName);
ps.setString(2, secondName);
ResultSet rs = ps.executeQuery();
if (rs.first()) {
System.out.println("This client has an order, can`t be deleted");
} else {
ps =
OracleConnection.getConnection()
.prepareStatement("DELETE FROM client WHERE first_name = ? and secind_name = ?");
ps.setString(1, firstName);
ps.setString(2, secondName);
ps.executeUpdate();
}
}