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Explain following terms with suitable example. (i) Weak entity set (ii) Data manipulation language (iii) Foreign key (iv) Super key
written 7.3 years ago by gravatar for anjalisharma anjalisharma • 160 modified 4.0 years ago by gravatar for binitamayekar binitamayekar ★ 6.7k
database management systems
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written 7.3 years ago by gravatar for anjalisharma anjalisharma • 160 modified 7.2 years ago by gravatar for sanketshingote sanketshingote • 100

(i) Weak entity set:

An entity set that does not have a primary key is referred to as a weak entity set.

The existence of a weak entity set depends on the existence of a identifying entity set:

a. It must relate to the identifying entity set via a total, …

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