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Modify the CHARTER table to add the attributes shown in the following table. TABLE P8.37 ATTRIBUTES AND VALUES FOR PROBLEM 37 ATTRIBUTE NAME ATTRIBUTE DESCRIPTION ATTRIBUTE TYPE CHAR_WAIT_CHG Waiting charge for each model (copied from the MODEL table) Numeric CHAR_FLT_CHG_HR Flight charge per mile for each model (copied from the MODEL table using the MOD_CHG_MILE attribute) Numeric CHAR_FLT_CHG Flight charge (calculated by CHAR_HOURS_FLOWN × CHAR_FLT_CHG_HR) Numeric CHAR_TAX_CHG CHAR_FLT_CHG × tax rate (8%) Numeric CHAR_TOT_CHG CHAR_FLT_CHG + CHAR_TAX_CHG Numeric CHAR_PYMT Amount paid by customer Numeric CHAR_BALANCE Balance remaining after payment Numeric

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Database Systems: Design, Implemen...

12th Edition
Carlos Coronel + 1 other
Publisher: Cengage Learning
ISBN: 9781305627482

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Chapter
Section
BuyFindarrow_forward

Database Systems: Design, Implemen...

12th Edition
Carlos Coronel + 1 other
Publisher: Cengage Learning
ISBN: 9781305627482
Chapter 8, Problem 34P
Textbook Problem
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Modify the CHARTER table to add the attributes shown in the following table.

TABLE P8.37   ATTRIBUTES AND VALUES FOR PROBLEM 37

ATTRIBUTE NAME ATTRIBUTE DESCRIPTION ATTRIBUTE TYPE
CHAR_WAIT_CHG Waiting charge for each model (copied from the MODEL table) Numeric
CHAR_FLT_CHG_HR Flight charge per mile for each model (copied from the MODEL table using the MOD_CHG_MILE attribute) Numeric
CHAR_FLT_CHG Flight charge (calculated by CHAR_HOURS_FLOWN × CHAR_FLT_CHG_HR) Numeric
CHAR_TAX_CHG CHAR_FLT_CHG × tax rate (8%) Numeric
CHAR_TOT_CHG CHAR_FLT_CHG + CHAR_TAX_CHG Numeric
CHAR_PYMT Amount paid by customer Numeric
CHAR_BALANCE Balance remaining after payment Numeric

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:

Syntax to drop constraint is as follows:

ALTER TABLE table_Name ADD CONSTRAINT constraintName;

Explanation of Solution

Query to alter the table:

Query 1:

ALTER TABLE CHARTER ADD CHAR_WAIT_CHG NUMBER(6,2);

Query 2:

ALTER TABLE CHARTER ADD CHAR_FLT_CHG_HR NUMBER(6,2);

Query 3:

ALTER TABLE CHARTER ADD CHAR_FLT_CHG NUMBER(10,2);

Query 4:

ALTER TABLE CHARTER ADD CHAR_TAX_CHG NUMBER(6,2);

Query 5:

ALTER TABLE CHARTER ADD CHAR_TOT_CHG NUMBER(10,2);

Query 6:

ALTER TABLE CHARTER ADD CHAR_PYMT NUMBER(10,2);

Query 7:

ALTER TABLE CHARTER ADD CHAR_BALANCE NUMBER(10,2);

Explanation:

  • The query 1 adds “CHAR_WAIT_CHG” to the table “CHARTER” and is declared as ‘NUMBER” data type.
  • The query 2 adds “CHAR_FLT_CHG_HR” to the table “CHARTER” and is declared as ‘NUMBER” data type...

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Chapter 8 Solutions

Database Systems: Design, Implementation, & Management
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