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Introduction to SQL

Introduction to SQL
ON UPDATE CASCADE ensures which of the following?

Normalization
Data Integrity
Materialized Views
All of these

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

DIFFERENT
DISTINCT
UNIQUE
DISTINCTIVE

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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 > ALL (SELECT SALARY FROM EMPLOYEE);prints

5
9
0
10

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Introduction to SQL
DISTINCT and its counterpart, ALL, can be used more than once in a SELECT statement.

False
True

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Introduction to SQL
The SQL statement that queries or reads data from a table is ________ .

QUERY
READ
None of these
SELECT

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Introduction to SQL
The rows of the result relation produced by a SELECT statement can be sorted, but only by one column.

False
True

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