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!
Write a short note on QBE?
Stands for "Query By Example." QBE is a feature involved along with various database applications which gives user-friendly techniques of running database queries. Typically without QBE, a user must write input commands using right SQL (Structured Query Language) syntax. This is a standard language in which nearly all database programs support. Therefore, if the syntax is slightly incorrect the query might return the wrong results or may not run at all. The Query By Example feature gives a simple interface for a user to enter queries. Instead of writing an whole SQL command, the user can just fill in blanks or select items to describe the query she needs to perform. For instance, a user may need to select an entry from a table called "Table1" with an ID of 123. Using SQL, the user would required to input the command, "SELECT * FROM Table1 WHERE ID = 123". The QBE interface might permit the user to just click on Table1, type in "123" in the ID field and click "Search." QBE is offered along with most database programs, by the interface is often different among applications. For example, Microsoft Access has a QBE interface known as "Query Design View" which is totally graphical. The phpMyAdmin application used along with MySQL, offers a Web-based interface whereas users can choose a query operator and fill in blanks with search terms. Whatever QBE implementation is given with a program, the purpose is the similar - to make it easier to run database queries and to prevent the frustrations of SQL errors
using the invoice table shown below,write the relational schema,draw a dependencies,inclunding all partial and transitive dependencies.assume that the table does not contain repeat
Many-to-many : Entities in A and B are related with any number of entities from each other. Example: Taught_by Relationship among course and faculty. One faculty member ca
What is relationship? Give examples A relationship is an association between several entities. Example: A depositor relationship associates a customer with every account tha
Differentiate between logical database design and physical database design. Show how this separation leads to data independence? Basis Logical Databas
Define a job scheduling strategy that will meet business requirement of reporting availability by 6am CST for the following cubes? Show the job scheduling dependencies in a pictori
What is an entity relationship model? The entity relationship model is a set of basic objects known as entities and relationship between those objects. An entity is a thing or
Implementation of association as an object Implement as a separate association object, independent of either class, as in Figure. An association object is a group of pairs
How is concurrency identified? Concurrency in objects can be identified by the way they alter their state. Current objects can change their state independently. Aggregation imp
what is database management system? & why it is required?
What is the difference between serial and sequential files? How searching is applied on both? Ans: A serial file is one where the records have been stored in the order where
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