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Introduction to SQL

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

AVG
LEN
JOIN
LEFT

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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

9
10
0
5

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Introduction to SQL
The ADD command is used to enter one row of data or to add multiple rows as a result of a query.

False
True

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Introduction to SQL
Which one of the following sorts rows in SQL?

SORT BY
GROUP BY
ALIGN BY
ORDER BY

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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
A subquery in an SQL SELECT statement is enclosed in:

brackets -- [...].
CAPITAL LETTERS.
braces -- {...}.
parenthesis -- (...) .

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