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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.
what is multivalued dependency
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What is the used of specifying alias? Specifying alias: is used to rename column or attribute in a table.
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Explain the Natural join Natural join is a binary operator which is written as (R* S) in which R and S are relations. The effect of the natural join is the set of all combinati
Explain What is Relation? A database relation is a predefined row or column format for storing information in a relational database. Relations are equal to tables.
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What is an entity relationship model? The entity relationship model is a collection of basic objects known as entities and relationship between those objects. An
What is multiple relationship ?
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