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Introduction to SQL

Introduction to SQL
The SQL statement: SELECT Number1 + Number 2 AS Total FROM NUMBER_TABLE; adds two numbers from each row together and lists the results in a column named Total.

False
True

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Introduction to SQL
The SQL statementSELECT ROUND(45.926, -1) FROM DUAL;

prints 045.926
prints 50
prints garbage
is illegal

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Introduction to SQL
Find all the cities whose humidity is 89

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

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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
The SQL WHERE clause:

limits the row data are returned.
Both A and B are correct.
Neither A nor B are correct.
limits the column data that are returned.

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Introduction to SQL
Which of the following do you need to consider when you make a table in SQL?

All of these
Primary keys
Default values
Data types

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