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What is the Diff. Between Relational Algebra & Calculas?
{| ! width="33%" | Point of Comparison |- ! width="33%" | R.Algebra ! width="33%" | R.Calculus | Is it Query Language ? YES YES Relation Query Describe step-by-step proceduar for computing the desired answer ,depend on the order in which operator are applies in query Describe the set of answer without being excplicit about how they should be computed Type Proceduar Non-proceduar |}
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What are the main differences between relational algebra and relational calculus?
Relation algebra is a procedural language where relation calculus is non-procedural languageRelational algebra, an offshoot of first-orderlogic (and of algebra of sets), deals with a set of finitaryrelations (see also relation (database)) which is closed under certain operators. These operators operate on one or more relations to yield a relation. Relational algebra is a part of computer science.Relational calculus consists of two calculi, the tuplerelational calculus and the domain relational calculus, that are part of the relational model for databases and provide a declarative way to specify database queries. This in contrast to the relational algebra which is also part of the relational model but provides a more procedural way for specifying queries.The relational algebra might suggest these steps to retrieve the phone numbers and names of book stores that supply Some Sample Book:1. Join books and titles over the BookstoreID.2. Restrict the result of that join to tuplesfor the book Some Sample Book.3. Project the result of that restriction over StoreNameand StorePhone.The relational calculus would formulate a descriptive, declarative way:Get StoreNameand StorePhonefor supplies such that there exists a title BK with the same BookstoreIDvalue and with a BookTitlevalue of Some Sample Book.The relational algebra and the relational calculus are essentially logically equivalent: for any algebraic expression, there is an equivalent expression in the calculus, and vice versa.This result is known as Codd'stheorem
Explain the select Operation in Relational Algebra with an example?
Relational Algebra - Example
Unary and binary operators in relational Algebra?
The nnary and Binary operators in relational Algebra.
Where did the word algebra and calculus came from?
algebra - arabic, calculus - latin
What is the utility of relational algebra relational calculas name some software's based on these concept?
What is the utility of relational algebra relational calculas name some software's based on these concept?"
What are the main differences between relational algebra and relational calculus?
Relation algebra is a procedural language where relation calculus is non-procedural languageRelational algebra, an offshoot of first-orderlogic (and of algebra of sets), deals with a set of finitaryrelations (see also relation (database)) which is closed under certain operators. These operators operate on one or more relations to yield a relation. Relational algebra is a part of computer science.Relational calculus consists of two calculi, the tuplerelational calculus and the domain relational calculus, that are part of the relational model for databases and provide a declarative way to specify database queries. This in contrast to the relational algebra which is also part of the relational model but provides a more procedural way for specifying queries.The relational algebra might suggest these steps to retrieve the phone numbers and names of book stores that supply Some Sample Book:1. Join books and titles over the BookstoreID.2. Restrict the result of that join to tuplesfor the book Some Sample Book.3. Project the result of that restriction over StoreNameand StorePhone.The relational calculus would formulate a descriptive, declarative way:Get StoreNameand StorePhonefor supplies such that there exists a title BK with the same BookstoreIDvalue and with a BookTitlevalue of Some Sample Book.The relational algebra and the relational calculus are essentially logically equivalent: for any algebraic expression, there is an equivalent expression in the calculus, and vice versa.This result is known as Codd'stheorem
What are the different types of database languages?
Two main types: Relational Calculus based Language Relational Algebra based Language. These languages provide similar set of operations but with different syntax. Calculus based is more kind of procedural and near to English, while Algebra based uses a set of symbols for queries.
Explain the select Operation in Relational Algebra with an example?
Relational Algebra - Example
Are calculus and linear algebra courses hard for an individual who got an a plus in algebra?
you don't go from algebra to calculus and linear algebra. you go from algebra to geometry to advanced algebra with trig to pre calculus to calculus 1 to calculus 2 to calculus 3 to linear algebra. so since you got an A+ in algebra, I think you are good.
Unary and binary operators in relational Algebra?
The nnary and Binary operators in relational Algebra.
What relation and relation schema?
Relational Schema refers to meta-data elements which are used to describe structures and constraints of data representing a particular http://wiki.answers.com/Describe_the_differences_in_meaning_between_the_terms_relation_and_relation_schema#. Whereas a relation is a property or predicate that ranges over more than one argumentHere's some translation from "Relational Algebra" to http://wiki.answers.com/Describe_the_differences_in_meaning_between_the_terms_relation_and_relation_schema#terminology:"Relation" = Table."Relation Schema" = Table definition.So for example, the "schema" for the Person "relation" is: Person(FirstName, LastName, Age, Gender, Address)Also in relational Algebra, a "tuple" is a table row, and an "attribute" is a table column.
Where did the word algebra and calculus came from?
algebra - arabic, calculus - latin
What is the utility of relational algebra relational calculas name some software's based on these concept?
What is the utility of relational algebra relational calculas name some software's based on these concept?"
What is the difference between Algebra 2 and Pre calculus?
Im currently taking Pre Calculus and took Algebra 2 last year. To be honest, there really is no difference, there are only three new chapters of content we didnt go over last year in the whole book. If you passed Algebra 2 you'll pass Pre Calculus.
Is relational algebra under abstract algebra?
yes
Software on relational algebra?
Oracle8i
Why do you have to learn algebra in maths?
Because Algebra is the foundation of Calculus, and Calculus is the fundamental measurement of the Universe.
