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Introduction to SQL

Introduction to SQL
'AS' clause is used in SQL for

Projection operation.
Rename operation.
Selection operation.
Join operation.

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Introduction to SQL
The SELECT command, with its various clauses, allows users to query the data contained in the tables and ask many different questions or ad hoc queries.

False
True

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Introduction to SQL
The SQL statementSELECT SUBSTR('abcdefghij', INSTR('123321234', '2', 3, 2), 2) FROM DUAL;prints

bc
gh
23
ab

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Introduction to SQL
Count function in SQL returns the number of

distinct values.
values.
columns.
groups.

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Introduction to SQL
The condition in a WHERE clause can refer to only one value.

True
False

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Introduction to SQL
Which of the following are the five built-in functions provided by SQL?

SUM, AVG, MIN, MAX, MULT
SUM, AVG, MIN, MAX, NAME
SUM, AVG, MULT, DIV, MIN
COUNT, SUM, AVG, MAX, MIN

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