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SQLize.online is a free online SQL environment for quickly running, experimenting with and sharing code. You can run your SQL code on top of the most popular RDBMS including MySQL, MariaDB, SQLite, PostgreSQL, Oracle and Microsoft SQL Server.

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WITH t (hospital, city, region) AS ( SELECT 'ПУДП 3', 'Москва', 'Московский' FROM dual UNION ALL SELECT 'ЦКБ УДП', 'Москва', 'Московский' FROM dual UNION ALL SELECT 'Поликлиника №1', 'Ярославль', 'Ярославский' FROM dual ) SELECT CASE WHEN GROUPING_ID(region,hospital,city) = 3 THEN t.region ELSE t.hospital END hospital, t.city FROM t GROUP BY GROUPING SETS(t.region,(t.region,t.hospital,t.city)) ORDER BY t.region, GROUPING_ID(t.region,t.hospital,t.city) DESC, t.hospital, t.city

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