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Title: When selecting an identifier, one should: Post by: boyob89 on Jun 4, 2016 When selecting an identifier, one should:
A) use large composite keys instead of single-attribute surrogate keys B) use intelligent keys C) choose a candidate key that will not change its value over the life of each instance of the entity type D) choose a candidate key such that for each instance of the entity, the attribute is guaranteed to have valid values or is null Title: Re: When selecting an identifier, one should: Post by: MartyJay on Jun 15, 2016 Content hidden
Title: Re: When selecting an identifier, one should: Post by: boyob89 on Jun 20, 2016 finally :)
thx for your expertise Title: Re: When selecting an identifier, one should: Post by: MartyJay on Jun 21, 2016 Glad I could help
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