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Describe logical data independence ?
Logical Data Independence - It is the capacity to modify the conceptual schema without having to change external schemas or application programs. The conceptual schema might be changed to expand the database (through adding a record type or data item), to change constraints, or to decrease the database (by removing a record type or data item). Only the view definition and the mappings required are changed in a DBMS that supports logical data independence. Changes to constraints could be applied to the conceptual schema without moving the external schemas or application programs.
Define DBMS? DBMS: database management system (DBMS) is computer software designed for the reason of supervision databases based on a variety of data models.
limitations and benefits in database tecknowlagy
List the SQL domain Types? SQL supports the following domain types. 1) Char(n) 2) varchar(n) 3) int 4) numeric(p,d) 5) float(n) 6) date.
please give me introduction to full data in D B M S in a short assignment
What is the aim of object design The aim of object design is to identify object which the system contains and the interactions among them. The system implements specification
How to Insert data in your table from another table? insert into e.g, To insert tuples from employee into N_emp created above, use following statement Insert into N_emp
You group has been hired by TrainingrUs.com to keeps track of training revenues. TrainingrUS.com wants you to keep scheduling. COURSE table contains following information:
(a) Provide the description of the following ODMG schema in the Object Definition Language (ODL). (b) Based on the above object database, write the following queries i
Q. With the help of a suitable diagram gives module wise explanation of system architecture of DBMS. Sol. A Database management is a collection of interrelated data and col
. Ashutosh Dubey who is the director of Gyan Gurukul want a three-level schema architecture for the Gyan Gurukul Company that provide better security also design a data abstraction
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