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Introduction to SQL

Introduction to SQL
Microsoft Access has become ubiquitous, and being able to program in Access is a critical skill.

True
False

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Introduction to SQL
The SQL statementSELECT ROUND(45.926, -1) FROM DUAL;

prints 50
is illegal
prints 045.926
prints garbage

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Introduction to SQL
Count function in SQL returns the number of

groups.
values.
columns.
distinct values.

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Introduction to SQL
Indexes can usually be created for both primary and secondary keys.

False
True

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Introduction to SQL
Which SQL keyword is used to retrieve only unique values?

DISTINCT
UNIQUE
DIFFERENT
DISTINCTIVE

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Introduction to SQL
The SELECT statement SELECT 'Hi' FROM DUAL WHERE NULL = NULL; Outputs

Hi
Nothing
TRUE
FLASE

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