ev charging station plugs table structure

Lists number and type of plugs available at each electric vehicle charging station

Not required by all models.

Table Structure

Field	Type	NULL allowed	Default Value	Foreign key	Description
station_id	INTEGER	NO		EV_Charging_Stations(station_id)	Foreign key reference to the electric vehicle charging station defined in the EV_Charging_Station table
plug_type	INTEGER	NO		EV_Charging_Station_Plug_Types(plug_type)	Foreign key reference to the type of plug as available in the EV_Charging_Station_Plug_Types table
plug_count	INTEGER	YES	0		Number of plugs of specified type found at specified electric vehicle charging station

(* - Primary key)

The SQL statement for table and index creation is below.

CREATE TABLE IF NOT EXISTS EV_Charging_Station_Plugs(
    station_id INTEGER NOT NULL,
    plug_type  INTEGER NOT NULL,
    plug_count INTEGER DEFAULT 0,
    CONSTRAINT "fk_stat_id" FOREIGN KEY("station_id") REFERENCES EV_Charging_Stations("ID") ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED,
    CONSTRAINT "fk_plug_type" FOREIGN KEY("plug_type") REFERENCES EV_Charging_Station_Plug_Types("plug_type_id") DEFERRABLE INITIALLY DEFERRED
);