A Guide to SQL
A Guide to SQL
9th Edition
ISBN: 9781111527273
Author: Philip J. Pratt
Publisher: Course Technology Ptr
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Chapter 4, Problem 13TD
Program Plan Intro

“SELECT” command:

The “SELECT” command is used to retrieve data in a database.

Syntax for selecting values from the table is as follows:

SELECT STUDENT_ID FROM STUDENT;

  • The given query is used to display each student ID from “STUDENT” table.

“ORDER BY” Clause:

  • User can sort the data in specific order using “ORDER BY” clause.
  • The column on which to sort data is called a sort key or a simple key.
  • To sort the output, use an “ORDER BY” clause followed by the sort key.
  • If the user does not specify a sort order, the output displayed in default order that is ascending order.

Example:

The example for “ORDER BY” clause is given below:

SELECT STUDENT_ID, STUDENT_NAME, STUDENT_CREDIT FROM STUDENT ORDER BY STUDENT_CREDIT;

 The above query is used to list student ID, name, and credit for each student with ascending order of student credit using an “ORDER BY” clause.

  • From the given query, the sort key is “STUDENT_CREDIT”. So, the rows are sorted in ascending order by “STUDENT_CREDIT”.

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Chapter 4 Solutions

A Guide to SQL

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