An active database in pl-sql, PL-SQL Programming

Consider the following set of database tables (same tables from Assignment 6-1). Please take note of foreign keys (most of them carry the same names as the corresponding primary keys they reference): CUS_CODE in INVOICE, INV_NUMBER & P_CODE in LINE, and V_CODE in PRODUCT. The only exception to the naming convention is the EMP_MGR foreign key in EMPLOYEE which references the EMPLOYEE table in a recursive relationship.

The SQL script file myCompany.SQL (same one from Assignment 6-1) creates the tables below and inserts data into them. You WILL need to rerun the script again for this assignment since the contents of some of the files were altered during assignment 6-1. You should also run the script again before final submission of this assignment. Click HERE if you need the script again.

PS: As a reminder, your SQL statements should be generic enough to produce proper results EVEN if the data inside the database changes. For example, if I ask you to display the products provided by vendors located in TN, you can't manually extract the V_CODE for vendors in TN and use the results to search table PRODUCT for the corresponding products; instead, your query should be written using a join between the two tables or something similar.

I. Part 1: Writing More Complex SQL Queries: Save the SQL code for the following queries a single script file called Part1.sql. In addition, include each query along with its output in your report.

1. Create an SQL query that uses set operations to display the union of the last names in table CUSTOMER and the last names in table EMPLOYEE. Do not include duplicates in the output.

2. Create an SQL query that uses set operations to display the union of the last names in table CUSTOMER and the last names in table EMPLOYEE. This time, include duplicates in the output.

3. Create an SQL query that USES AN UNCORRELATED SUBQUERY1 AND NO JOINS2 to display the descriptions for products provided by a vendor in area code 615.

4. Create an SQL query that USES A CORRELATED SUBQUERY AND NO JOINS to display the descriptions for products provided by a vendor in area code 615.

II. Part 2: Creating and Executing a Stored Procedure: Save the SQL code for this stored procedure in a separate script file called Part2.sql. In addition, include the test steps - see below - along with their output in your report. Finally, answer the question below in your report.

Create an SQL Stored Procedure called prc_inv_delete that takes an invoice number as a parameter and deletes the invoice from table INVOICE. TEST STEPS: To test your procedure, do the following:

a) Run the following two SQL commands: SELECT * from INVOICE WHERE INV_NUMBER IN (1001, 1008); SELECT * from LINE WHERE INV_NUMBER IN (1001, 1008);

b) Execute your procedure to delete invoices 1001 and 1008.

c) Run the same SQL commands again: SELECT * from INVOICE WHERE INV_NUMBER IN (1001, 1008); SELECT * from LINE WHERE INV_NUMBER IN (1001, 1008);

d) Undo all changes made by issuing a rollback command.

Answer this question: Did the corresponding lines for invoices 1001 and 1008 in table LINE get deleted automatically? Can you explain why?

Posted Date: 2/15/2013 5:42:17 AM | Location : United States







Related Discussions:- An active database in pl-sql, Assignment Help, Ask Question on An active database in pl-sql, Get Answer, Expert's Help, An active database in pl-sql Discussions

Write discussion on An active database in pl-sql
Your posts are moderated
Related Questions
How Transactions Guard Your Database The transaction is a sequence of SQL data manipulation statements which does a logical unit of work. The Oracle treats the sequence of SQL

Using Aggregation on Nested Tables Example is the most direct translation of its counterpart in the theory book that can be obtained in SQL but it is so over-elaborate that no

Authorisations - Privileges As relational theory is silent on the issue of authorisation, it offers nothing with which SQL's vast edifice in support of what it calls privilege

Special cases of projection This section describes the identity projection, r {ALL BUT}, and the projection on no attributes, r { }, which yields TABLE_DUM when r is empty, ot

Data Abstraction The Data abstraction extracts the important properties of data while ignoring the not necessary details. Once you design a data structure, you can fail to reme

Keyword &Parameter Description: index_name: This is an undeclared identifier which can be referenced only within the FORALL statement and only as the collection subscript

Use of COUNT in SQL It describes and discusses various general methods of expressing constraints, eventually noting that support for "=" with relation operands is sufficient f

Aggregate Operators SQL Supports all of the aggregate operators mentioned in the theory book and many more besides. The syntax, however, involves an unusual trick that SQL cal

#quesWrite a cursor to open an employee database and fetch the employee record whose age is greater than 45.tion..

Declaring Exceptions The Exceptions can be declared only in the declarative part of the PL/SQL subprogram, block, or package. By introducing its name, you can declare an excep