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Define a property that is not a property of transactions? Ans: Concurrency is not a property of transactions
What is the used of specifying alias? Specifying alias: is used to rename column or attribute in a table.
Attributes and its types explain?
Question: Consider the following database relations for a textbook ordering system used by a college bookshop: Book (b-copy#, bname, ISBN#, author, price, subject) Order (s#
Nested Queries Let us see some more complex queries in this section. Sub-queries: Some of the basic concerns of sub-queries are: A sub-query is a SELECT statemen
Differentiate sub-class and super-class? The specialization of a class is known as subclasses.eg: employee is a subclass of person and teller is a subclass of employee. Convers
What is the use of unique function? UNIQUE function: If UNIQUE is specified then only unique values are used to computed the mean.
Multiple column Queries: Syntax: SELECT COLUMN1, COL2,...... FROM TABLE WHERE (COLUMN1, COL2, ...) IN (SELECT COLUMN1, COL2,.... FROM TABLE WHERE );
A database administrator''s responsibilities and data contents
what is the relationship between receipt and owner entities in computer sales and service company
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