video_category

4 rows where c_uid = "c_q7kmz"

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Link v_uid c_uid
v_0glcm,c_q7kmz v_0glcm Outdoor c_q7kmz
v_9rb3h,c_q7kmz v_9rb3h Outdoor c_q7kmz
v_fs20n,c_q7kmz v_fs20n Outdoor c_q7kmz
v_hvidn,c_q7kmz v_hvidn Outdoor c_q7kmz

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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);