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Introduction to SQL

Introduction to SQL
Indexes may be created or dropped at any time.

True
False

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Introduction to SQL
The result of every SQL query is a table.

False
True

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Introduction to SQL
Which of the following must be enclosed in double quotes?

Dates
All of these
Column Alias
Strings

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Introduction to SQL
The command to remove rows from a table 'CUSTOMER' is:

REMOVE FROM CUSTOMER ...
DELETE FROM CUSTOMER WHERE ...
DROP FROM CUSTOMER ...
UPDATE FROM CUSTOMER ...

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Introduction to SQL
The FROM SQL clause is used to...

specify range for search condition
None of these
specify what table we are selecting or deleting data FROM
specify search condition

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Introduction to SQL
When three or more AND and OR conditions are combined, it is easier to use the SQL keyword(s):

LIKE only.
NOT IN only.
Both IN and NOT IN.
IN only.

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