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Introduction to SQL

Introduction to SQL
The condition in a WHERE clause can refer to only one value.

True
False

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Introduction to SQL
Most companies keep at least two versions of any database they are using.

False
True

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Introduction to SQL
The HAVING clause acts like a WHERE clause, but it identifies groups that meet a criterion, rather than rows.

False
True

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Introduction to SQL
The rows of the result relation produced by a SELECT statement can be sorted, but only by one column.

True
False

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

TRUE
Nothing
Hi
FLASE

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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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