0
1. Relational algebra operations manipulate some relations and provide some expression in the form of queries where as relational calculus are formed queries on the basis of pairs of expressions.
2. RA have operator like join, union, intersection, division, difference, projection, selection etc. where as RC has tuples and domain oriented expressions.
3. RA is procedural language where as RC is non procedural query system.
4. Expressive power of RA and RC are equivalent. This means any query that could be expressed in RA could be expressed by formula in RC.
5. Any KC formula is translated in Algebric query.
6. There is modification which is easy in queries in RA than the RC.
7 RA formed the mathematical form and have no specificjuer1 language RC also has mathematical form but has one query language QUEL.
8. Relational algebra is easy to manipulate and understand than RC.
9. RA queries are more powerful than the RC.
10. RC are formed WFFs where as RA does not form any formula.
Wiki User
∙ 10y ago
Add your answer:
Earn +20 pts
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 TYPE of math skills would astronauts use as in how much math do they need to know algebra 2 or calculus please be specific?
Algebra and calculus
What is differential statistics?
Differential statistics are statistics that use calculus. Normally statistics would use algebra but differential statistics uses calculus instead of algebra.
Is Algebra II similar to Algebra I?
Math is taught like this: Pre-Algebra, Algebra I, Geometry, Algebra 2, Pre-Calculus, Calculus, Trigonometry. Algebra I is similar to Algebra 2, but Algebra 2 has more difficult concepts, such as imaginary numbers. Added: I would have put statistics and trig in between Algebra 2 and Pre-calculus. You review trig in precalculus and statistics is the first transferable math course in college.
What is harder geometry or pre-calculus?
Pre-calculus is supposed to be a stringent review of trig and algebra in preparation for calculus. So, pre-calculus, I would say.
Are you bad at calculus if you are good at basic mathematics and algebra?
Oh, please... How would being good at something make you bad at something else? That just doesn't make sense. Specifically in the case of calculus, you NEED math and algebra, so:If you have trouble with algebra, you will also have trouble with calculus, andIf you are good at algebra, your chances at calculus are much better.
What course to take before advanced calculus?
You must have a strong basis in Algebra, Algebra II, Geometry and Trigonometry. Usually high schools offer a pre-Calculus course which is somewhat of a conglomeration of the aforementioned courses. Then you would move into differential calculus, integral calculus, vector (multi-variable) calculus, and finally differential equations, which is considered to be at the top of the hierarchy of the calculus courses. So take Algebra, Algebra II, Geometry and Trigonometry to get your strong foundation before begining the calculus sequence.
What math courses does a restaurant owner need?
A restaurant owner would most likely find a use for algebra and should be able to solve systems of linear equations (which should be taught in either Algebra or early Algebra II). Pre-Calculus, Calculus, Geometry, and beyond will probably be useless.
Do you have to have algebra to get into vet school?
From what I have read, you need physics and/or statistics and/or calculus to get into vet school. All of those courses require knowledge of algebra. So I would say yes.
Why not allow database programmers to write directly in relational algebra instead of sql?
I would guess the SQL language was considered to be simpler for the programmer.
Which math used in mechanicl first year students?
A first year student would use mechanics, geometry, trigonometry, coordinate geometry, algebra, differential calculus, integral calculus.
Is algebra needed for an English degree?
Assuming you mean a B.A. in English, the answer would be most likely, yes. In order to graduate from college, schools require some level of math to be completed - and it is usually beyond algebra (most likely calculus or at least up to algebra 2).
