Скачать или смотреть POSTGRESQL everything about Materialized Views & Normal view with examples (English, Hindi)

POSTGRESQL everything about Materialized Views & Normal view with examples
https://www.postgresql.org/docs/curre...

⭐️ Contents ⭐
⌨️ (0:00) Introduction
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SELECT * FROM demo_test.VW_MOVIES_RAT_NEW_MAT;--12
REFRESH MATERIALIZED VIEW CONCURRENTLY demo_test.VW_MOVIES_RAT_NEW_MAT;
SELECT COUNT(1) FROM demo_test.RATINGS_NEW WHERE MOVIEID IN (11,12)

CREATE UNIQUE INDEX IDX_VW_MOVIES_RAT_NEW_MAT ON
demo_test.VW_MOVIES_RAT_NEW_MAT(MOVIEID,USERID);--177618
SELECT COUNT(1) FROM demo_test.VW_MOVIES_RAT_NEW_MAT;--198401
SELECT 198401 - 177618;--20783 --20783
CREATE MATERIALIZED VIEW demo_test.VW_MOVIES_RAT_NEW_MAT
AS
SELECT M.*,R.USERID,R.RATING FROM demo_test.MOVIES_NEW M --177618
INNER JOIN demo_test.RATINGS_NEW R
ON M.MOVIEID = R.MOVIEID
WITH DATA;


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