Database Concepts (8th Edition)
Database Concepts (8th Edition)
8th Edition
ISBN: 9780134601533
Author: David M. Kroenke, David J. Auer, Scott L. Vandenberg, Robert C. Yoder
Publisher: PEARSON
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Chapter 3, Problem 3.20RQ
Program Plan Intro

Display values from table:

The contents from the table can be viewed by using “SELECT” statement which comes under Data Manipulation Language (DML).

The Syntax to view the contents using asterisk (*) is as follows:

SELECT * FROM table_Name;

Selective columns can also be retrieved by replacing all the column(s) names in place of the asterisk symbol.

DISTINCT Keyword:

“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;

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5. Word FrequencyWrite a program that reads the contents of a text file. The program should create a dictio-nary in which the keys are the individual words found in the file and the values are the number of times each word appears. For example, if the word “the” appears 128 times, the dictionary would contain an element with 'the' as the key and 128 as the value. The program should either display the frequency of each word or create a second file containing a list of each word and its frequency.
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Database Concepts (8th Edition)

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