SQL Queries - Python Syntax - Database Connector - Logical ERD - Program Design - IT Assignment Help

Assignment Task

SQL Queries - Python Syntax - Database Connector - Logical ERD - Program Design - IT Assignment Help

Logical ERD: containing relations with attributes (and data types) and identification of primary and foreign keys. Relationships between relations should include cardinality and optionality in Crow foot notation. 

•    Table population with proper insert statement (use of serial data type; use of query to set proper foreign key)

Program execution 

Includes: proper SQL queries; proper Python syntax; proper database access using database connector.

•    Inserting a rental

o    Display all rentals of customer

o    Display all existing tools

Optional refinement: Display all existing tools currently NOT rented by the customer

o    Rental insertion only if selected tool not currently rented by a customer

o    Proper dates for rental_date (current date) and return_date (rental_date + rental_days)

o    Display updated rentals of customer 

•    Deleting a rental 

o    Display all rentals of customer

o    Rental deletion only if the selected tool is currently rented

o    Display updated rentals of customer 

•    Query options 

o    Display all customers 

o    Display all tools with jobs, sorted by job name and tool name 

o    Display all rentals, including customer first and last name, tool name, rental date, rental return date 

o    Display all overdue rentals with a customer phone number, tool name, and dates 

Program design 

•    Useful & readable decomposition (one task per function) 

•    Proper use of flow control

o    Iteration & quit option 

o    Decision where appropriate 

•    User-friendly interface 
 
o    Menu display

o    Display of query results

o    Display of appropriate & useful messages 

•    Database connection 

o    open/close connection 

o    open/close cursor 

o    proper SQL query execution with cursor

o      committing of changes

Error checking 

•    Database connection (exit if fails) 

•    User input: menu option 

•    User input: invalid customer 

•    User input: invalid film

•    Display of appropriate error messages

Program readability 

•    The naming of variables and functions 

•    Code comments

•    Function block comments

Test Plan 

•    Test plan completed (min 10 test cases)

Table column format: test case #; test purpose; test data; expected result; actual result
 

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