video_category

4 rows where v_uid = "v_3j3xm"

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Link v_uid c_uid
v_3j3xm,c_0j4bf v_3j3xm Amateur c_0j4bf
v_3j3xm,c_nouxx v_3j3xm Creampie c_nouxx
v_3j3xm,c_s7xka v_3j3xm Sailor Uniform c_s7xka
v_3j3xm,c_s8q54 v_3j3xm Academy Uniform c_s8q54

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CREATE TABLE video_category (
  v_uid TEXT NOT NULL REFERENCES videos(uid)     ON DELETE CASCADE,
  c_uid TEXT NOT NULL REFERENCES categories(uid) ON DELETE CASCADE,
  PRIMARY KEY (v_uid, c_uid)
);
CREATE INDEX idx_video_category_c ON video_category(c_uid);