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PRAGMA foreign_keys = ON;
CREATE TABLE `state` (
`state_name` text
, `population` integer DEFAULT NULL
, `area` double DEFAULT NULL
, `country_name` varchar(3) NOT NULL DEFAULT ''
, `capital` text
, `density` double DEFAULT NULL
, PRIMARY KEY (`state_name`)
);
CREATE TABLE `city` (
`city_name` text
, `population` integer DEFAULT NULL
, `country_name` varchar(3) NOT NULL DEFAULT ''
, `state_name` text
, PRIMARY KEY (`city_name`,`state_name`)
, FOREIGN KEY(`state_name`) REFERENCES `state`(`state_name`)
);
CREATE TABLE `border_info` (
`state_name` text
, `border` text
, PRIMARY KEY (`border`,`state_name`)
, FOREIGN KEY(`state_name`) REFERENCES `state`(`state_name`)
, FOREIGN KEY(`border`) REFERENCES `state`(`state_name`)
);
CREATE TABLE `highlow` (
`state_name` text
, `highest_elevation` text
, `lowest_point` text
, `highest_point` text
, `lowest_elevation` text
, PRIMARY KEY (`state_name`)
, FOREIGN KEY(`state_name`) REFERENCES `state`(`state_name`)
);
CREATE TABLE `lake` (
`lake_name` text
, `area` double DEFAULT NULL
, `country_name` varchar(3) NOT NULL DEFAULT ''
, `state_name` text
);
CREATE TABLE `mountain` (
`mountain_name` text
, `mountain_altitude` integer DEFAULT NULL
, `country_name` varchar(3) NOT NULL DEFAULT ''
, `state_name` text
, PRIMARY KEY (`mountain_name`, `state_name`)
, FOREIGN KEY(`state_name`) REFERENCES `state`(`state_name`)
);
CREATE TABLE `river` (
`river_name` text
, `length` integer DEFAULT NULL
, `country_name` varchar(3) NOT NULL DEFAULT ''
, `traverse` text
, PRIMARY KEY (`river_name`)
, FOREIGN KEY(`traverse`) REFERENCES `state`(`state_name`)
); |