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A Guide to SQL

9th Edition
Philip J. Pratt
Publisher: Course Technology Ptr
ISBN: 9781111527273
Chapter 6, Problem 7CAT
Textbook Problem
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Add to the PADDLING table a new character column named DIFFICULTY_LEVEL that is three characters in length. Then set the default difficulty level value for all rows to the value MOD.

Program Plan Intro

ALTER TABLE Statement:

  • “ALTER TABLE” statement comes under Data Definition Language.
  • It is used to modify column, add constraints, add column(s), drop column, rename column name and table name, drop constraints, and so on.

Syntax:

The Syntax to drop constraint is as follows:

ALTER TABLE table_Name ADD CONSTRAINT constraintName;

UPDATE command:

  • The UPDATE command is employed to update information present in a table.
  • It is always used with SET keyword either in bulk or individually.

Syntax for update the value in the table is given as follows:

The Syntax for update the value in the table is given below:

UPDATE table_name

SET column1 = data1, column2 = data2, ...

WHERE condition;

Explanation of Solution

Alter the table “PADDLING”:

ALTER TABLE PADDLING ADD DIFFICULTY_LEVEL CHAR (3);

Explanation:

  • The above query will add “DIFFICULTY_LEVEL” attribute to the table “PADDLING”.
  • The “DIFFICULTY_LEVEL” is declared as “CHAR” datatype with a three character length.

Update values into the table “PADDLING”:

UPDATE PADDLING SET D...

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Chapter 6 Solutions

A Guide to SQL
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Ch. 6 - Which command and clause changes the...Ch. 6 - Which command deletes a table and all its data?Ch. 6 - Microsoft Access supports make-table queries. What...Ch. 6 - Use SOL to make the following changes to the TAL...Ch. 6 - Insert into the NONGAME table the item number,...Ch. 6 - In the NONGAME table, change the description of...Ch. 6 - In the NONGAME table, increase the price of each...Ch. 6 - Add the following item to the NONGAME table: item...Ch. 6 - Delete every item in the NONGAME table for which...Ch. 6 - In the NONGAME table, change the category for item...Ch. 6 - Add a column named ON_HAND_VALUE to the NONGAME...Ch. 6 - In the NONGAME table, increase the length of the...Ch. 6 - Remove the NONGAME table from the TAL Distributors...Ch. 6 - Use the Internet to find the SQL command to delete...Ch. 6 - Use SQL to make the following changes to the...Ch. 6 - Insert into the PADDLING table the trip ID, trip...Ch. 6 - For all trips located in Connecticut (CT),...Ch. 6 - Insert a new trip into the PADDLING table. The...Ch. 6 - Delete the trip in the PADDLING table with the...Ch. 6 - The distance for the Pontook Reservoir Tour trip...Ch. 6 - Add to the PADDLING table a new character column...Ch. 6 - Change the DIFFICULTY_LEVEL column in the PADDLING...Ch. 6 - Change the length of the SEASON column in the...Ch. 6 - Change the DIFFICULTY_LEVEL column in the PADDLING...Ch. 6 - Delete the PADDLING table from the database.Ch. 6 - Use the Internet to research another data type...Ch. 6 - Use SQL to make the following changes to the...Ch. 6 - Insert into the LARGE_CONDO table the location...Ch. 6 - Solmaris has increased the condo fee of each large...Ch. 6 - After increasing the condo fee of each large condo...Ch. 6 - Insert a row into the LARGE_CONDO table for a new...Ch. 6 - Delete all condos in the LARGE_CONDO table for...Ch. 6 - The condo in location 1 and unit 503 is in the...Ch. 6 - Add to the LARGE_CONDO table a new character...Ch. 6 - Change the OCCUPIED column in the LARGE_CONDO...Ch. 6 - Change the CONDO_FEE column in the LARGE_CONDO...Ch. 6 - Delete the LARGE_CONDO table from the database.Ch. 6 - Use the Internet to research another data type...

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