DATABASE SYSTEM CONCEPTS (LOOSELEAF)
DATABASE SYSTEM CONCEPTS (LOOSELEAF)
7th Edition
ISBN: 9781260515046
Author: SILBERSCHATZ
Publisher: MCG
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Chapter 3, Problem 11E

Explanation of Solution

a.

DISTINCT:

“DISTINCT” keyword is used to avoid redundant data (removing duplicate values) from a column. The syntax for “DISTINCT” keyword is as follows:

SELECT DISTINCT column_Name FROM table_Name;

Query:

Select distinct name from student natural join takes natural join course where course...

Explanation of Solution

b.

Query:

Select ID, name from student natural join takes except

Select ID, name from student natural join takes where year<2017

Explanation:

...

Explanation of Solution

c.

Query:

Select dept_name, max(salary) from instructor group by dept_name

Explanat...

Explanation of Solution

d.

Query:

Select min(max_sal) from (select dept_name, max(salary) as max_sal from instructor group by dept_name)

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