1CREATE TABLE tasks ( 2 page, 3 md5, 4 date, 5 user, 6 text 7); 8 9CREATE UNIQUE INDEX idx_tasks_page_md5 ON tasks(page, md5); 10 11CREATE TABLE task_status ( 12 page, 13 md5, 14 status 15); 16 17CREATE UNIQUE INDEX idx_task_status_page_md5 ON task_status(page, md5); 18 19