ÐÒÉ×ÅÔ. > ðÒÅÄÐÏÌÁÇÁÅÔÓÑ ÌÉ ÓÄÅÌÁÔØ ×ÏÚÍÏÖÎÙÍ Ñ×ÎÙÊ ËÁÓÔ Ë ÄÏÍÅÎÕ? > îÁÐÒÉÍÅÒ: > create domain D_BOOL as smallint not null check (value in (0, 1)); > select cast(1 as D_BOOL) from RDB$DATABASE;
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