Wybierz wszystkie domeny bazy danych Firbird
SELECT
f.rdb$field_name
FROM
rdb$fields f
LEFT JOIN rdb$relation_fields rf
ON rf.rdb$field_source = f.rdb$field_name
WHERE
rf.rdb$field_name IS NULL
AND
COALESCE(f.rdb$system_flag, 0) = 0
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