A Guide to SQL
9th Edition
ISBN: 9781111527273
Author: Philip J. Pratt
Publisher: Course Technology Ptr
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Expert Solution & Answer
Chapter 4, Problem 5RQ
Explanation of Solution
Computed column in SQL:
- User can perform computations using SQL queries.
- A computed column does not occurs in the
database however it can be computed by using data present in the existing columns. - The computations can involve any arithmetic operator.
- Computations can computed by using the arithmetic operator such + (addition), - (subtraction), * (multiplication) and / (division).
- Then write the computation result into a place of a particular column name.
Example:
The example for using computed column in SQL is given below:
SELECT STUDENT_ID, STUDENT_NAME, MAXIMUM_LIMIT – SCORE FROM STUDENT;
The above query is used to display student id, student name and student credit from “STUDENT” table...
Explanation of Solution
Naming the computed column in SQL:
- User can assign a name to the computation by using below ways:
- Name the computation with the word “AS”.
- User desired name.
Example:
The example for naming the computed column in SQL is shown below:
SELECT STUDENT_ID, STUDENT_NAME, MAXIMUM_LIMIT – SCORE AS STUDENT_CREDIT FROM STUDENT;
The above query is used to display student id, student name and student credit from “STUDENT” table...
Expert Solution & Answer
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Chapter 4 Solutions
A Guide to SQL
Ch. 4 - Prob. 1RQCh. 4 - Prob. 2RQCh. 4 - Prob. 3RQCh. 4 - Prob. 4RQCh. 4 - Prob. 5RQCh. 4 - In which clause would you use a wildcard in a...Ch. 4 - Prob. 7RQCh. 4 - How do you determine whether a column contains one...Ch. 4 - Prob. 9RQCh. 4 - Prob. 10RQ
Ch. 4 - Prob. 11RQCh. 4 - Prob. 12RQCh. 4 - Prob. 13RQCh. 4 - Prob. 14RQCh. 4 - Prob. 15RQCh. 4 - Prob. 16RQCh. 4 - How do you find rows in which a particular column...Ch. 4 - Use the Internet to research the SQL [charlist]...Ch. 4 - Prob. 1TDCh. 4 - Prob. 2TDCh. 4 - Prob. 3TDCh. 4 - Prob. 4TDCh. 4 - Prob. 5TDCh. 4 - Prob. 6TDCh. 4 - Prob. 7TDCh. 4 - Prob. 8TDCh. 4 - Prob. 9TDCh. 4 - Prob. 10TDCh. 4 - Prob. 11TDCh. 4 - Prob. 12TDCh. 4 - Prob. 13TDCh. 4 - Prob. 14TDCh. 4 - Prob. 15TDCh. 4 - Prob. 16TDCh. 4 - What is the price of the least expensive item in...Ch. 4 - Prob. 18TDCh. 4 - Prob. 19TDCh. 4 - Prob. 20TDCh. 4 - Prob. 21TDCh. 4 - Prob. 22TDCh. 4 - Prob. 23TDCh. 4 - Prob. 1CATCh. 4 - Prob. 2CATCh. 4 - Prob. 3CATCh. 4 - Prob. 4CATCh. 4 - Prob. 5CATCh. 4 - Prob. 6CATCh. 4 - Prob. 7CATCh. 4 - Prob. 8CATCh. 4 - Prob. 9CATCh. 4 - Prob. 10CATCh. 4 - Prob. 11CATCh. 4 - Prob. 12CATCh. 4 - Prob. 13CATCh. 4 - Prob. 14CATCh. 4 - Prob. 15CATCh. 4 - Prob. 16CATCh. 4 - Prob. 17CATCh. 4 - Prob. 18CATCh. 4 - Prob. 19CATCh. 4 - List the reservation ID and trip ID for all trips...Ch. 4 - Prob. 1SCGCh. 4 - Prob. 2SCGCh. 4 - Prob. 3SCGCh. 4 - Prob. 4SCGCh. 4 - Prob. 5SCGCh. 4 - Prob. 6SCGCh. 4 - Prob. 7SCGCh. 4 - Prob. 8SCGCh. 4 - Prob. 9SCGCh. 4 - Prob. 10SCGCh. 4 - Prob. 11SCGCh. 4 - Prob. 12SCGCh. 4 - Prob. 13SCGCh. 4 - Prob. 14SCGCh. 4 - Prob. 15SCGCh. 4 - Prob. 16SCG
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