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Introduction to SQL

Introduction to SQL
To establish a range of values, < and > can be used.

True
False

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Introduction to SQL
The SQL -92 wildcards are ____ and ____ .

underscore(_); question mark (?)
question mark (?); asterisk (*)
percent sign (%); underscore (_)
asterisk (*); percent sign (%)

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Introduction to SQL
Find all the cities whose humidity is 89

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

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

file
table
report
form

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Introduction to SQL
Let the statementSELECT column1 FROM myTable;return 10 rows. The statementSELECT ALL column1 FROM myTable;will return

less than 10 rows
exactly 10 rows
more than 10 rows
None of these

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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?

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

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