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Introduction to SQL

Introduction to SQL
Which of the following is a valid SQL type?

All of these
CHARACTER
NUMERIC
FLOAT

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Introduction to SQL
Find all the cities whose humidity is 89

SELECT humidity = 89 FROM weather;
SELECT city WHERE humidity = 89;
SELECT city FROM weather;
SELECT city FROM weather WHERE humidity = 89;

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Introduction to SQL
The SELECT statement SELECT 'Hi' FROM DUAL WHERE NULL = NULL; Outputs

Nothing
TRUE
Hi
FLASE

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

UNIQUE
DIFFERENT
DISTINCT
DISTINCTIVE

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Introduction to SQL
Which operator performs pattern matching?

LIKE operator
BETWEEN operator
None of these
EXISTS operator

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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
5
9

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