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language
Relational algebra, an offshoot of first-order
logic (and of algebra of sets), deals with a set of finitary
relations (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 tuple
relational 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 tuples
for the book Some Sample Book.
3. Project the result of that restriction over StoreName
and StorePhone.
The relational calculus would formulate a descriptive, declarative way:
Get StoreName
and StorePhone
for supplies such that there exists a title BK with the same BookstoreID
value and with a BookTitle
value 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's
theorem
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1 Difference between relational algebra and relation Calculus?
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 |}
What is the difference between linear algebra and calculus?
Example: Algebra will show you how quickly the gallon will fill over time. Calculus will show you how quickly the gallon will fill over time while it is also being slowly drained.
What is difference between linear syntax and relational algebra?
They are not alternative solutions so that we can compare them. Relational database (which is based on relational algebra) demands (atleast the founder of relational database Codd suggests) that the query language follow linear syntax. The linear syntax languages don't rely up on newline characters as terminators of expressions or statements -- instead they rely on other tokens such as semicolon or comma and so on.
Can you take precalculus and algebra 2 trig at the same time?
No, you can't. Although similar in concepts, Pre-Calculus is more advanced than Algebra 2. Algebra 2 is taken between Algebra 1 and Geometry or after Geometry and before Pre-Calculus. The reason that you can't take both at the same time is because of the curriculum. Pre-Calculus does not spend nearly as much time on linear topics (linear equations, linear programming, etc.) as Algebra 2 does. Pre-Calculus also almost always is 2 courses in one: Pre-Calculus and Trigonometry. Algebra 2 has very little, if any, trig. Topics that they have in common are quadratics equations/functions, polynomial equations/functions, rational functions, exponential & logarithmic functions (sometimes these are not covered in Algebra 2), possibly conic sections in Algebra 2, definitely in Pre-Calculus, factoring, and probability/sequences/series/statistics. In addition to trigonometry, pre-calculus also covers polar and parametric topics (these will NEVER NEVER NEVER be seen in Algebra 2) and an introduction to limits. So, you must take Algebra 2 before pre-calculus. If you want to take 2 math courses in 1 year, try algebra 1 and geometry (not very common), algebra 2 and geometry (somewhat common), and some schools allow honors students with a solid A in Algebra 2 (assuming you took Algebra 2 before Geometry, this differs between schools) allow you to take geometry and pre-calculus in the same year. The study of proofs is not a major topic in pre-calculus, and proofs make up a majority of geometry.
What are the differences between newtonian calculus and lebniz calculus?
Leibniz's contribution was more on developing the theoretical basis and the notation whereas Newton's was more in its application.
