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Differentiate between a subquery and a join
If we need to acquire information from one or more tables after that either subquery or join can be used. If the columns which are to appear in the result table are from different tables after that a join must be employed.
explain cascading rollback
Design a gennalization and specialization hierarchy for an automobile sales company
Can a filed occur in several field groups. Yes. But it leads to redundant data redundancy.
Every School has many teachers and many students. Each student is assigned to one school and each teacher works for one school only. Each teacher teaches more than one subject but
What is a data dictionary? A data dictionary is a data structure which keeps Meta data about the structure of the database i.e. the schema of the database.
In an organization several projects are undertaken. Each project can employ one or more employees. Each employee can work on one or more projects. Each project is undertaken on the
is Chipo carrying his baby
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.
In the architecture of a database system which external level used? In the architecture of a database system view external level used.
What is a database? At any given time, they're storing a tremendous amount of information - inventory, in the case of Amazon, messages and interrelationships in the case of Tw
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