Ask Question, Ask an Expert

+61-413 786 465

info@mywordsolution.com

Ask PL-SQL Expert

Assignemnt: "Database Transactions"

ABC Markets sell products to customers. The relational schema shown below represents the main entities for ABC's database. Note the following important characteristics:

• A customer can make many purchases, each one represented by an invoice.

o The CUS_BALANCE is updated with each credit purchase or payment and represents the amount the customer owes.
o The CUS_BALANCE is increased (+) with every credit purchase and decreased (-) with every customer payment.
o The date of last purchase is updated with each new purchase made by the customer.
o The date of last payment is updated with each new payment made by the customer.

• An invoice represents a product purchase by a customer.

o An INVOICE can have many invoice LINEs, one for each product purchased.
o The INV_TOTAL represents the total cost of invoice including taxes.
o The INV_TERMS can be "30", "60" or "90" (representing the number of days of credit), or "CASH", "CHECK" or "CC".
o The invoice status can be "OPEN", "PAID", or "CANCEL".

• A product's quantity on hand (P_QTYOH) is updated (decreased) with each product sale.

• A customer can make many payments. The payment type (PMT_TYPE) can be one of the following:

o "CASH" for cash payments.
o "CHECK" for check payments.
o "CC" for credit card payments.

• The payment details (PMT_DETAILS) are used to record data about check or credit card payments:

o The bank, account number, and check number for check payments.
o The issuer, credit card number, and expiration date for credit card payments.

Note: Not all entities and attributes are represented in this example. Use only the attributes indicated.

The ABC Markets Relational Schema

1051_Markets-Relational-Schema.jpg

Using this database, write the SQL code to represent each one of the following transactions. Use BEGIN TRANSACTION and COMMIT to group the SQL statements in logical transactions.

1. On May 11, 2006, customer 10010 makes a credit purchase (30 days) of one unit of product 11QER/31 with a unit price of $110.00; the tax rate is 8%. The invoice number is 10983, and this invoice has only one product line.

2. On June 3, 2006, customer 10010 makes a payment of $100 in cash. The payment ID is 3428.

3. Create a simple transaction log (using the same format as that in the case assignment) to represent the actions of the two previous transactions.

Note: The "before" values in the transaction can be assumed. The "after" value must be computed using the assumed "before" value, plus or minus the transaction value. Also, in order to save some space, you can combine the "after" values for the INSERT statements into a single cell. Actually, each value could be entered in individual rows.

PL-SQL, Programming

  • Category:- PL-SQL
  • Reference No.:- M92543071
  • Price:- $30

Priced at Now at $30, Verified Solution

Have any Question?


Related Questions in PL-SQL

Purpose of the assessment with ulo mapping the purpose of

Purpose of the assessment (with ULO Mapping) The purpose of this assignment is to develop skills in managing data in databases and to gain understanding of data model development and implementation using a commercially a ...

Continuing the project you have worked on in weeks 1-4 in

Continuing the project you have worked on in Weeks 1-4, in this final week, complete the following tasks: Refine your database and SQL statements by incorporating your instructor's feedback. Verify that the database comp ...

Complete the following tasksin microsoft access create the

Complete the following tasks: In Microsoft Access, create the database and tables that you identified in W3 Assignment 2. In Microsoft Word, write the SQL statements to create the database and tables. Write SQL statement ...

For this assignment you will be provided a database backup

For this assignment, you will be provided a database backup for a database called FinanceDB. You will have to restore this backup to your own version of SQL Server. All of the questions in this assignment relate to the F ...

Assignment - queries functions and triggersaimthe aims of

Assignment - Queries, Functions and Triggers Aim The aims of this assignment are to: formulate SQL queries; populate an RDBMS with a real dataset, and analyse the data; design test data for testing SQL queries; create SQ ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Why might a bank avoid the use of interest rate swaps even

Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate

Describe the difference between zero coupon bonds and

Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p

Compute the present value of an annuity of 880 per year

Compute the present value of an annuity of $ 880 per year for 16 years, given a discount rate of 6 percent per annum. As

Compute the present value of an 1150 payment made in ten

Compute the present value of an $1,150 payment made in ten years when the discount rate is 12 percent. (Do not round int

Compute the present value of an annuity of 699 per year

Compute the present value of an annuity of $ 699 per year for 19 years, given a discount rate of 6 percent per annum. As