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Attributes that are directly kept in the data base.
For example, 'Birth date' attribute of a person.
Derived
Attributes that are not stored directly but can be derived from stored attributes are known as derived attributes. For instance, The years of services of a 'person' entity can be determined from the present date and the date of joining of the person. Likewise, total salary of a 'person' can be calculated from 'basic salary' attribute of a 'person'.
Describe the shadow paging technique.
What functions does a data dictionary perform? In a (DBMS)data management system, the principal functions performed by the data dictionary are Management of data defini
management information system based on functional organisation
A table joined with itself is called ? A table joined with itself is known as self join table. Normal 0 false false false EN-IN X-NONE X-NONE
let us consider a table having 2200 records and the fixed size of the table to be considered as 25.then how many numbers of table is requredto perform horizontal fragmentation
Find the names of all Albums that have more than 30 tracks. Result: (name: varchar(255))
Design a database for an airline.The database must keep track of customers and their reservations,flights and their status, seat assignment on individual flights and, the schedule
Consider the subsequent relations for a database which keeps track of business trips of salespersons in a sales office: SALESPERSON (SSN, Name, start_year, Dept_no) TRIP (SSN, Fr
How can i turn a conceptual entity relationship diagram into a logical entity relationship diagram? what do i have to do with "mandetory or" and "optional or" relationships?
Creating views with Replace option : This option is used to alter the definition of the view without recreating and dropping it or regranting object privileges previously granted o
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