COMPUTER SCIENCE AND ENGINEERING
SQL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Nothing
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All records
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All rows
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All records containing *
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Detailed explanation-1: -An asterisk (” * “) can be used to specify that the query should return all columns of the queried tables. SELECT is the most complex statement in SQL, with optional keywords and clauses that include: The FROM clause, which indicates the table(s) to retrieve data from.
Detailed explanation-2: -SELECT is an SQL keyword which indicates what we want to show (retrieve). * (asterisk) means “everything, all columns”. FROM is another SQL keyword which indicates the table(s) (i.e. the source of the data we need).
Detailed explanation-3: -To select something means to choose it from among others. If you select the most expensive phone, it doesn’t necessarily mean you will be happy with what you get. You can use select as an adjective as well as a verb.