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CREATE TABLE test ( "id" serial, "created_at" date, "value" int ); INSERT INTO test VALUES (1,'2021-02-01',100), (1,'2021-02-10',100), (1,'2021-02-21',115), (1,'2021-02-25',115), (1,'2021-03-01',115), (1,'2021-03-11',100), (2,'2021-02-25',115), (2,'2021-03-01',115), (2,'2021-03-11',100); SELECT *, row_number() over (ORDER BY created_at) as rownum FROM test
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