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Describe domain constraints.
Domain constraints contain entity integrity and referential integrity. The domain is a set of values that might be assigned to an attribute. The entity integrity rule states that no part of a primary key cannot be null. Referential integrity states that every foreign key value must match a primary key value or be null.
Distributed Database Management System
define normalisation and functional dependency
Define Physical and Logical independence Ans: Physical data independence: The ability to modify physical level without causing application program to be rewritten. Logic
What is relationship? Give examples A relationship is an association between several entities. Example: A depositor relationship associates a customer with every account tha
It is mandatory that for every table in the LDB hierarchy there should exist one GET statement in the report. False. It is not essential.
Example - ALTER TABLE emp MODIFY (empno NUMBER (7));
Project Description: I am having a random problem with my Wordpress site. If I click on "Publish" and "Add new", it takes me to a 404 page not found of /wp-admin/post.php (th
Multiple column Queries: Syntax: SELECT COLUMN1, COL2,...... FROM TABLE WHERE (COLUMN1, COL2, ...) IN (SELECT COLUMN1, COL2,.... FROM TABLE WHERE );
can you please explain with the help of suitable example the difference between conflict equivalence and conflict serializability?
What are the uses of ODBC? Under what circumstances we use this technology? ODBC expose database capabilities within a standardized way to the application programmer by an ap
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