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create table test ( col varchar(64) ); insert into test values ('ЧС.1.1'), ('ЧС.1.2'), ('ЧС.1.3.1'), ('ЧС.1.10'), ('ЧС.1.11.1'), ('П.1.1'), ('П.1.2'), ('П.10.2'), ('П.2.10'); select col from test order by (string_to_array(col, '.'))[1], (string_to_array(col, '.'))[2]::int, (string_to_array(col, '.'))[3]::int;
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