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

Ask an Expert

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

Write your message here..

Related Questions

Inserting objects in pl sql, Inserting Objects: You can use the INSERT... Inserting Objects: You can use the INSERT statement to add objects to an object table. In the illustration below, you insert a Person object into the object table persons:

Example of not exists operator - sql, Example of NOT EXISTS Operator - SQL ... Example of NOT EXISTS Operator - SQL Example is a translation into SQL of the corresponding example, which is included there merely to show that for any scalar comparison the

Relational algebra, Define basic operators of relational algebra with an ex... Define basic operators of relational algebra with an example each

Need database development with analysis tools, Need Database Development wi... Need Database Development with Analysis Tools Project Description: I want a database for large governmental and private data sets on one country that can be simply extended t

%rowtype - cursors, %ROWTYPE: This attribute gives a record type which ... %ROWTYPE: This attribute gives a record type which represents a row in the database table or a row fetched from a formerly declared cursor. The Fields in the record and corresp

Change sql file into csv for product registration, Change Sql file into CSV... Change Sql file into CSV for product registration on Magento Project Description: I have a set of files that are in Sql format and could like for a developer to help me with

Merge two data sources to sql azure database, Project Description: I hav... Project Description: I have two types of data sources. One that is a list in SharePoint and another that is an access desktop database. The access desktop database is fairly com

Table comparison - sql, Table Comparison - SQL The following definitio... Table Comparison - SQL The following definitions for relation comparisons: Let r1 and r2 be relations having the same heading. Then: r1 ⊆ r2 is true if every tuple of r1

Miller-urey''s experimental procedure, MILLER-UREY' S EXPERIMENTAL PROCEDU... MILLER-UREY' S EXPERIMENTAL PROCEDURES - They recreated the probable conditions on the primitive earth in the laboratory. An atmosphere containing hydrogen, ammonia, me

Example of alternative formulation as a table constraint, Example of Altern... Example of Alternative formulation as a table constraint Example: Alternative formulation as a table constraint ALTER TABLE EXAM_MARK ADD CONSTRAINT Must_be_enrolled_to_