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Introduction to SQL

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

DISTINCT
DISTINCTIVE
UNIQUE
DIFFERENT

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

True
False

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Introduction to SQL
SELECT DISTINCT is used if a user wishes to see duplicate columns in a query.

True
False

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Introduction to SQL
Table Employee has 10 records. It has a non-NULL SALARY column which is also UNIQUE.The SQL statementSELECT COUNT(*) FROM Employee WHERE SALARY > ANY (SELECT SALARY FROM EMPLOYEE);prints

0
10
9
5

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Introduction to SQL
The SQL statement: SELECT Name, COUNT(*) FROM NAME_TABLE; counts the number of name rows and displays this total in a table with a single row and a single column.

False
True

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Introduction to SQL
Which of the following do you need to consider when you make a table in SQL?

Data types
Primary keys
Default values
All of these

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