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--- | |
CREATE TABLE users( | |
id integer PRIMARY KEY, | |
name varchar(50), | |
... | |
); | |
CREATE TABLE user_followers( | |
user_id integer, | |
follower_id integer, | |
... | |
CONSTRAINT user_id_follower_id PRIMARY KEY(user_id, follower_id) | |
); | |
CREATE MATERIALIZED VIEW popular_user AS | |
SELECT user_id, count(1) AS follower | |
FROM user_followers | |
GROUP BY user_id | |
; | |
CREATE INDEX ON popular_user (user_id); |
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