'Create trigger trigger' diaporamas de présentation

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IT420: Database Management and Organization

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IT420: Database Management and Organization

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??????????????. ????????????? ???. ?????????????. RDBMS ????? ????? ????? ???????? ?? Constraint NULL/NOT NULL Unique Primary Key Foreign Key References check. ? 1. create table customers (cid char(4) not null, cname varchar(13), city varchar(20),

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