video_category

4 rows where c_uid = "c_kmfd6"

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Link v_uid c_uid
v_45ro5,c_kmfd6 v_45ro5 Masochist Man c_kmfd6
v_fqg11,c_kmfd6 v_fqg11 Masochist Man c_kmfd6
v_l2omn,c_kmfd6 v_l2omn Masochist Man c_kmfd6
v_y6qfe,c_kmfd6 v_y6qfe Masochist Man c_kmfd6

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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);