Database Discussion Response

Database Discussion Response

topic : Database Discussion Response

Please respond to the following discussion below with 150 words or more relating to relational algebra and its relation to SQL.

From what I have researched, relational algebra is one of a few different collections of mathematical formulas to manipulate data in a relation or table. It is a procedural query language that uses relation instances for input and relation occurrences for output (AskingLot, 2020). It is the formal description of how a database operates and a means to interface with it to manipulate and utilize raw data (Russell, 2016). Basic relational algebra operators are select, project, union, set difference, and Cartesian product.

SQL is the query language that is essentially the front end user interface built upon relational algebra. Relational algebra and relational calculus together form the base for the SQL language (AskingLot, 2020). SQL operator inputs are translated to relational algebra before being applied to the relation. Some basic syntax operators for SQL are select, insert, delete, update, and create.

Examples of the differences in syntax are below:


SELECT *attribute* FROM *table/relation/s* WHERE *condition to be met*

Relational Algebra:

PROJECT *attribute* (SELECT *condition to be met* (table/relation))


π *attribute* (σ *condition to be met* (table/relation))

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rubric for Database Discussion Response

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Main idea Clearly presents a There is a main idea Vague sense of a No main idea
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Organization: Well-planned and Good overall There is a sense of No sense of
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  Includes title, the main although some of the  
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  statement of main   are used weakly or  
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Organization: All paragraphs have Most paragraphs have Some paragraphs Para. lack clear ideas
Paragraphs clear ideas, are clear ideas, are have clear ideas,  
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Content Exceptionally well- Well-presented and Content is sound and Content is not sound
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Research (if Sources are Sources are well Sources support The paper does not
assignment exceptionally well- integrated and some claims made in use adequate
includes a integrated and they support the paper’s the paper, but might research or if it does,
research support claims claims. There may be not be integrated the sources are not
component) argued in the paper occasional errors, but well within the integrated well.
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  Quotations and Works Cited conform There may be a few correctly according
  Works Cited to MLA style sheet. errors in MLA to MLA style, nor
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Style: Sentence Sentences are clear Sentences are clear Sentences are Sentences aren’t
structure and varied in but may lack generally clear but clear
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