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What is trigger?
Triggers are statements that are executed automatically by the system as the side effect of a modification to the database.
What it creates while a primary key is combined with a foreign key? It creates Parent-Child relation ship between the tables that connect them while a primary key is combined w
Relational Model: The relational model uses a collection of tables to represent both data and the relationships among those data. Each table has multiple columns and each column h
What are the several forms of identity? a) Value b) Name c) Built-in
Write a query to define tables students and teachers as sub tables of people? Create table students of student under people Create table teachers of teacher under people
A constraint named less_than_20 was defined on the field date_of_birth of table student. Delete this constraint. ALTER TABLE student DROP CONSTRAINT less_than_20;
#question.ERD of any car
Greater potential for bugs: Since the sites of a distributed system operate simultaneously, it is more complex to ensure the correctness of algorithms. The art of constructing dis
Define the terms i) Entity set ii) Relationship set Entity set: The set of all entities of the similar type is termed as an entity set. Relationship set: The set of all rela
coventions for displaying an ER schema as ER diagram
(a) Why did SAP introduce the extended star schema?
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