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Introduction to SQL

Introduction to SQL
The result of a SQL SELECT statement is a ________ .

file
form
report
table

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Introduction to SQL
Which of the following SQL query is correct for selecting the name of staffs from 'staffinfo' table where salary is 10,000 or 25,000?

SELECT name FROM staffinfo WHERE salary BETWEEN 10000 AND 25000;
None of these
Both A and B
SELECT name FROM staffinfo WHERE salary IN (10000, 25000);

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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

10
0
9
5

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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
Which SQL keyword is used to retrieve only unique values?

DISTINCTIVE
DIFFERENT
DISTINCT
UNIQUE

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Introduction to SQL
When three or more AND and OR conditions are combined, it is easier to use the SQL keyword(s):

IN only.
Both IN and NOT IN.
NOT IN only.
LIKE only.

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