CREATE TABLE "bookmark" (
	"id" int PRIMARY KEY,
	"folder_id" int CONSTRAINT folder_id REFERENCES folder(id),
	"name" varchar(255),
	"description" varchar(255),
	"url" varchar(255)
);
CREATE TABLE "folder" (
	"id" int PRIMARY KEY,
	"name" varchar(255),
	"description" varchar(255)
);
CREATE TABLE "folder_depth" (
	"parent_id" int CONSTRAINT folder_id REFERENCES folder(id),
	"child_id" int CONSTRAINT folder_id REFERENCES folder(id)
);