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In case of entity integrity, the primary key may be declared? In a case of entity integrity primary key may be not Null.
Single-Valued Dependencies A database is a collection of related information and it is therefore inevitable that some items of information in the database would depend on some
What is an entity relationship model? The entity relationship model is a collection of basic objects known as entities and relationship between those objects. An
(a) Explain the three types of potential mistake which could occur if concurrency control is not properly enforced in the database system. Support your answer with appropriate ex
please give me introduction to full data in D B M S in a short assignment
Ask questiwhat is row indicator in database on #Minimum 100 words accepted#
Explain the benefit of OOM. Main benefits of object oriented modeling are development of system become fast, quality of the system get improve. It gives freedom of use of alrea
Q. Explain data aggregatio n and discuss different design constraints. Sol. Aggregation One limitation of the E-R model is that it cannot express relationships amon
Horizontal Fragmentation- Horizontal fragmentation groups together the tuples in a relation that are collectively used by the main transactions. A horizontal fragment is produced b
What is conceptual schema? The schemas at the view level are known as subschema that describe dissimilar views of the database.
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