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Define weak and strong entity sets?
Weak entity set: entity set that do not have key attribute of their own are known as weak entity sets.
Strong entity set: Entity set that has a primary key is term a strong entity set.
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
Explain the Recoverable Schedule A recoverable schedule is one in which for each pair of transactions Ti and Tj such that Tj reads a data item formerly written by Ti, the comm
what is data link layer
can you resolve this for me please? Database Management Systems Homework 1 The following relations are given (primary keys are underlined): PLAY-ACTOR(AId, Name, Nationality, Birt
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What is Cardinality Ratio? Cardinality Ratios - The cardinality ratios for relationship kinds specifies the maximum number of relationship instances in which an entity can pa
Define DBA database administrator? DBA : A database administrator (DBA) is a person who is responsible for the environmental aspects of a database. In common, these involves:
List out various user authorization to modify the database schema. a) Index authorization b) Resource authorization c) Alteration authorization d) Drop authorizat
Part: Recommended (Non-query) Optimisations This section entitled "Recommended (non-query) optimisations" should be a brief report containing recommended optimisations you would
Scenario: You are a freelance database designer who has just been contacted by a small software development company named Altair Software. The president of the company has asked
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