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CREATE TABLE
INSERT 0 15
year ?column? array_agg
2018 25 {2018-12-10,2018-12-15,2018-12-16,2018-12-18,2018-12-21}
2019 1 {2019-01-08,2019-01-12,2019-01-16}
2018 24 {2018-12-02,2018-12-04,2018-12-05}
2019 0 {2019-01-02,2019-01-05}
2018 26 {2018-12-25,2018-12-30}
SELECT 5