relational algebra, Database Management System

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what is union compatable?

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Homework, can you resolve this for me please? Database Management Systems ...

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

Normalization, Normalize the given relation to 3NF, justifying each step

Normalize the given relation to 3NF, justifying each step

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in an organization several projects are undertaken. Each project can employ one or more employees. Each employee can work on one or more projects. Each project is undertaken on the

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When a function module is activated syntax checking is performed automatically. YEs, a function module is activated syntax checking.

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Which two files are used during operation of the DBMS? Data dictionary and transaction log are two files used during operation of the DBMS.

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What are metrics for choosing the best algorithm, What are metrics for choo...

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Define average seek time. The average seek time is the average of the seek times, calculated over a sequence of random requests.

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Explain data independence ? Data independence is the capacity to modify the schema at one stage of a database system without having to change the schema at the further level.

Illustrate the diagram - association as a cache, Association as a cache ...

Association as a cache This association must be updated when any new element is added to it, but testing for overlap using association is more efficient.    Figure:

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