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Information Technologies Deneme Sınavı Sorusu #1276622

"A primary key cannot be NULL value". Which constrains of relational schema does this sentence describe?


Domain constraints.

Key constraints.

Attribute constraints.

Entity integrity constraints.

Referential integrity constraints.

Yanıt Açıklaması:

Relational schema have some restrictions such as domain constraints, key constraints, entity integrity constrains and referential integrity constraints. According to entity integrity constraints, a primary key cannot be NULL value.

PAYLAŞ:

SORUNUN CEVABI: D

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