video_category

5 rows where v_uid = "v_i5c9z"

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Link v_uid c_uid
v_i5c9z,c_0951h v_i5c9z Hi-Def c_0951h
v_i5c9z,c_0tc2g v_i5c9z Variety c_0tc2g
v_i5c9z,c_2usm9 v_i5c9z Threesome / Foursome c_2usm9
v_i5c9z,c_nouxx v_i5c9z Creampie c_nouxx
v_i5c9z,c_uagh4 v_i5c9z Featured Actress c_uagh4

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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);