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What is a disjoint less constraint?
Ans: It needs that an entity belongs to no much more than one level entity set.
Disjoint less constraint needs that an entity belongs to no more than one level entity set. (the meaning of Disjoint less constraint is that an entity can be a member of at most one of the subclasses of the specialization.)
A well-maintained relational DBMS has a high level of data integrity. What features of a relational DBMS contribute towards this level of integrity? Relational DBMS gives high
1. Which model is used to store data in tree structures Ans: Hierarchical model is used to store data in tree structures
what should be included in this???
List and explain the memory constructs of the Oracle 12c databases?
Database Administrator One of the main perpose for having the database management system is to have control of both data or programs accessing that data. The person having li
Determine the steps of path in association network You can analyse use of paths in association network in the following steps: Examine every operation and see what asso
task upload
Can a filed occur in several field groups. Yes. But it leads to redundant data redundancy.
Your friend owns a computer store in Yuen Long, selling Desktop and Notebook PCs and other computer peripherals. Having been rather successful with his business there, he decided t
It defines that the tuple in one relation that refers to another relation must refer to an existing tuple in that relation. This constraint is states on two relations (not essentia
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