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What will be create when a primary key if combined with a foreign key?
A primary key if combined with a foreign key it creates Parent-Child relationship between the tables that connect them.
Explain the two types of participation constraint. Total: The participation of an entity set E in a relationship set R is said to be total if each entity in E participates i
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Differentiate between natural join and outer join? Natural join is a binary operator which is written as (R * S) where as R and S are relations. The output of the natural join
Answer SQL Queries to extract data from data tables and questions on mapping conceptual data models into relational data model.
In which relational modes, cardinality is termed? Answer : Cardinality is termed in a number of tuples relational modes.
State the definition of association An association is a structural relationship which specifies that objects of one thing are connected with objects of another. In UML, asso
In an E-R diagram how attributes are represented ? In an E-R diagram attributes are represented in a ellipse.
For this application, we will consider IBM DB2 catalog data (i.e., metadata) for IBM's enterprise-class servers running the z/OS (formerly OS/390 or MVS) operating system. One of
WHAT IS DATABASE TECHNOLOGIES
What is data block? Data Block - In oracle the data blocks are referred to as tablespaces. A tablespace is an fields of disk consisting of one or more disk files. A tablespace
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