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Introduction to SQL

Introduction to SQL
The SQL keyword(s) ________ is used with wildcards.

IN and NOT IN
LIKE only
IN only
NOT IN only

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

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

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Introduction to SQL
A subquery in an SQL SELECT statement:

can only be used with two tables.
can always be duplicated by a join.
cannot have its results sorted using ORDER BY.
has a distinct form that cannot be duplicated by a join.

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Introduction to SQL
Most companies keep at least two versions of any database they are using.

False
True

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Introduction to SQL
The format SELECT-FROM-WHERE is the fundamental framework of SQL SELECT statements.

False
True

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Introduction to SQL
Which command undo all the updates performed by the SQL in the transaction?

TRUNCATE
ROLLBACK
COMMIT
DELETE

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