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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
SQL is a programming language.

True
False

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Introduction to SQL
The SQL -92 wildcards are ____ and ____ .

underscore(_); question mark (?)
asterisk (*); percent sign (%)
percent sign (%); underscore (_)
question mark (?); asterisk (*)

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Introduction to SQL
If you are going to use a combination of three or more AND and OR conditions, it is often easier to use the NOT and NOT IN operators.

False
True

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Introduction to SQL
SUM, AVG, MIN, and MAX can only be used with numeric columns.

False
True

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Introduction to SQL
The SQL WHERE clause:

Neither A nor B are correct.
limits the column data that are returned.
Both A and B are correct.
limits the row data are returned.

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