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select range_agg(m) from (select tsrange(lower(t) at time zone 'UTC', upper(t) at time zone 'UTC', '[]') m from unnest('{(2020-01-02 03:04:05, 2021-02-03 06:07:08), (2023-01-02 03:04:05, 2024-02-03 06:07:08)}'::tstzmultirange) t) tt group by true ;

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