video_category

5 rows where c_uid = "c_o5pxl"

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Link v_uid c_uid
v_56tdv,c_o5pxl v_56tdv Sweating c_o5pxl
v_5sxka,c_o5pxl v_5sxka Sweating c_o5pxl
v_8ugd7,c_o5pxl v_8ugd7 Sweating c_o5pxl
v_kimwn,c_o5pxl v_kimwn Sweating c_o5pxl
v_yx3d5,c_o5pxl v_yx3d5 Sweating c_o5pxl

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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);