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Introduction to SQL

Introduction to SQL
There is an equivalent join expression that can be substituted for all subquery expressions.

True
False

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Introduction to SQL
Which of the following is a SQL aggregate function?

LEFT
AVG
JOIN
LEN

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

Strings
Dates
All of these
Column Alias

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Introduction to SQL
The benefits of a standard relational language include which of the following?

Increased dependence on a single vendor
All of these
Reduced training costs
Applications are not needed

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Introduction to SQL
The SQL statement: SELECT Number1 + Number 2 AS Total FROM NUMBER_TABLE; adds two numbers from each row together and lists the results in a column named Total.

True
False

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

DISTINCTIVE
DIFFERENT
UNIQUE
DISTINCT

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