Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Explain the term- Periodic recomputation
Periodic recomputation: Base values are often updated in bunches. Sometimes, it is possible to just recompute all derived attributes periodically without recomputing derived attributes after each base value is altered. Recomputation of all the derived attributes can be more proficient than incremental update since some derived attributes may depend on many base attributes and might be updated more than one time by an incremental approach.
Also, periodic recomputation is easier than explicit updates and less prone to bugs. While, if data set changes incrementally, some objects at a time, periodic recomputation is not practical since too many derived attributes may be recomputed when only a little are affected.
Explain forms based and graphical interface? Forms based and graphical interface: graphical user interface (GUI) is a kind of user interface which permits people to interact
Consider the ER schema below for the MoneyMaking supermarket chain problem. Translate the given ER schema into SQL CREATE TABLE statement.
What is called a query -execution engine? The query implementation engine takes a query evaluation plan, implements that plan, and returns the answers to the query.
What is vertical fragmentation? Vertical fragmentation divides the relation by decomposing the scheme R of relation r.
Normalization :It is a process of examine the given relation schemas based on their primary key and Functional Dependencies (FDs) to achieve the properties Minimizing redun
how to write tables and drow E-R diagrams for hosiptal management system and how to normalize and cardinalities?
average response time?
What is Relational DBMS This is our subject of study. A DBMS is relational if the data is organized into relations, that is, tables. In RDBMS, all data are kept in the well-kno
Aggregate functions Some of these functions are min, count, max, and avg. These functions help in getting consolidated information from a set of tuples. Example:
An entity set that does not have sufficient attributes to form a primary key is called? An entity set that doesn't have sufficient attribute to form a primary key is known as w
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd