select.river = SELECT id, name FROM rivers 
select.gauges = SELECT id, name, official_number FROM gauges WHERE river_id = :river_id
next.gauge.id = SELECT NEXTVAL('GAUGES_ID_SEQ') AS gauge_id
insert.gauge = INSERT INTO gauges (id, name, river_id, station, aeo, official_number, datum) \
                      VALUES(:id, :name, :river_id, :station, :aeo, :official_number, :datum)
select.timeintervals = SELECT id, start_time, stop_time FROM time_intervals
next.timeinterval.id = SELECT NEXTVAL('TIME_INTERVALS_ID_SEQ') AS time_interval_id
insert.timeinterval = INSERT INTO time_intervals (id, start_time, stop_time) VALUES (:id, :start_time, :stop_time)
next.discharge.id = SELECT NEXTVAL('DISCHARGE_TABLES_ID_SEQ') AS discharge_table_id
insert.dischargetable = INSERT INTO discharge_tables (id, gauge_id, description, kind, time_interval_id) \
                        VALUES (:id, :gauge_id, :description, 0, :time_interval_id)