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