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Introduction to SQL

Introduction to SQL
SUM, AVG, MIN, and MAX can only be used with numeric columns.

False
True

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Introduction to SQL
How to select all data from student table starting the name from letter 'r'?

SELECT * FROM student WHERE name LIKE '%r';
SELECT * FROM student WHERE name LIKE '%r%';
SELECT * FROM student WHERE name LIKE 'r%';
SELECT * FROM student WHERE name LIKE '_r%';

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

JOIN
LEFT
AVG
LEN

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Introduction to SQL
________ was adopted as a national standard by ANSI in 1992.

DBase
Microsoft Access
Oracle
SQL

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

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

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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 IN (10000, 25000);
SELECT name FROM staffinfo WHERE salary BETWEEN 10000 AND 25000;

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