Assignment - Query and update databases using SQL
This assignment requires you to use SQLite to complete the tasks.
Write and run SQL statements to complete the following tasks
Part A - DML
Locate the record in the vendor table that does not have a value for the attribute V_STATE.
Find the customers whose balance is greater than $300 but less than $400.
Show the names of the customers for whom we have invoices.
What is the max balance?
Show the CUS_CODE of the customers for whom we DO NOT have invoices.
Show the names of the customers for whom we DO NOT have invoices.
Find out how many times a customer generated an invoice - make sure the counted column heading reads "Invoices_generated".
List the names of the customers and how many times a customer generated an invoice - make sure the counted column heading reads "N_Of_Invoices".
Part B - DDL
Add a new row/record to the `customer` table to include your actual student_ID in the CUS_CODE, your last_name as the
CUS_LNAME` and your firstname as CUS_FNAME. Add any other details of your choice in all the other fields.
Add a new attribute (field) credit_history VARCHAR(6) to the customer table.
Update credit_history for customer '10011' to 'Bad'.
Delete the employee Leighla Genkazi from the EMP table.
Add a new attribute called ‘email_address' to ‘emp' table with data type and length ‘VARCHAR(20).
You are required to submit:
The SQL statements for each query, which should be copied from your SQLite3 Command Line and pasted into your submission file.Ifyoutype .echoon at the SQLite3 Command Line, SQLite will output yourSQL statement with the results of the query making it easy to copy and paste both.
The screenshots of the results of the SQL statements which are to be copied from your SQLite3 Command Line and pasted into your submission file immediately after you execute the SQL query.If you used an output file please submit only the output file.
Rationale -
This assessment aligns with the following subject outcomes: be able to critically analyse and modify an existing database design to meet new business requirements;
Attachment:- Assignment Files.rar