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What is candidate key?
Candidate Key - A candidate key of an entity set is a minimal superkey, which uniquely identifies each row in the relation.
intent locking
anyone have a textbook solutions case fair, 8 edition of vol 1 ?, please give me
How is Oracle used in PL/SQL? Define the features of process and how they are defined? PL/SQL - PL/SQL is Oracle's procedural language (PL) superset of the Structured
Part: Recommended (Non-query) Optimisations This section entitled "Recommended (non-query) optimisations" should be a brief report containing recommended optimisations you would
What are the different integrity constraints in RDBMS? The various integrity constraints in RDBMS are as: Primary Key: primary key is a grouping of one or more attributes
Design Of Distributed Databases: The distributed databases are mainly relational at local level. So a local database schema is the similar as that of a centralised database design
Define the terms i) Entity type ii) Entity set Entity type: An entity type describes a collection of entities that have the similar attributes. Entity set: The set of all en
Which operator is Cartesian product in relational algebra? Cartesian product in relational algebra is a binary operator. (It requires two operands. e.g., P X Q)
What are the aggregate objects in the data dictionary? Views Match codes Lock objects.
explain exhaustively the problems associated with ER diagrams. include illustrations in your answer
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