This assignment will give you hands-on practice in working with DDL, DML and Constraints using MySQL workbench.
For this assignment you will be using MySQL workbench tool. Grade points will be given to correct answers as well as clean and clear coding, e.g. formatting, indentation, consistent upper/lower cases, etc., where applicable.
Questions:
You must submit your SQL scripts for each questions. All Questions are equally weighted.
It is best practice to check your create and insert statements with describe and select statements, where
Create Database schema called ClassAssignment Use ClassAssignment database for rest of the exercise.
Create a table called Project with the following columns:
project_num INT(10) NOT NULL PRIMARY KEY project_code CHAR(4)
project_title VARCHAR(45) first_name VARCHAR(45) last_name VARCHAR(45)
project_budget DECIMAL(5,2)
Modify project_num to auto_increment and also auto_increment starts from 10.
Modify project_budget datatype from decimal (5, 2) to (10, 2).
Insert following values into the Project DO NOT insert project_num. Auto_increment should start from 10
project_code |
project_title |
first_name |
last_name |
project_budget |
PC01 |
DIA |
John |
Smith |
10000.99 |
PC02 |
CHF |
Tim |
Cook |
12000.50 |
PC03 |
AST |
Rhonda |
Smith |
8000.40 |
Create a table PayRoll with the following info:
employee_num INT(10) PRIMARY KEY AUTO_INCREMENT job_id INT(10) NOT NULLjob_desc VARCHAR(40) emp_pay DECIMAL (10,2)
Alter PayRoll table with the following, make sure to write each scripts separately
Add constraint on emp_pay so that only value greater than 10,000 can beinserted
Add constraint on job_desc so that default value set to ‘Data Analyst’.
Add column pay_date (DATE) after job_desc
Add Foreign Key constraint in PayRoll table with job_id column referencing to project_num column in Project
Insert following values into PayRoll table. DO NOT insert employee_num and job_desc, those should be auto populated using auto_increment and default values,
job_id |
pay_date |
emp_pay |
10 |
current date |
12000.99 |
11 |
current date |
14000.99 |
12 |
current date |
16000.99 |
Update emp_pay in PayRoll table for employee_num = 2 with 10% emp_pay increase
i.e. (emp_pay * 0.10).
Create Project_backup table from project table you created above using bulk insert statement only for last_name 'Smith'.
Create VIEW as PayRoll_View from PayRoll table you created above. However, your VIEW should only contain job_id, job_desc and pay_date for job_id > 10.
Create Index for pay_date on PayRoll table.
Delete all data from project_backup table but keep the table structure
Write a DELETE script to delete a row from Project table where project_num = If there is an error, give a short explanation of what/why about error msg?
Solve the question 15 above without error, i.e. write a script how you can delete
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