subcategories

0 rows where subcategory = "RT(K₁)"

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CREATE TABLE "subcategories" (
	"subcategory"	TEXT NOT NULL,
	"parent"	TEXT NOT NULL,
	FOREIGN KEY("parent") REFERENCES "categories"("name") on update cascade on delete restrict,
	FOREIGN KEY("subcategory") REFERENCES "categories"("name") on update cascade on delete restrict,
	PRIMARY KEY("subcategory","parent")
);