Lab 01 – Single-row Functions


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Lab 01 – Single-row Functions
This week’s lab continues using the SELECT command and learning the interfaces for both SQL
Developer and introduces the use of single-line functions.
Your submission will consist of two files:
(a) A single text-based SQL file with appropriate header and commenting – and
(b) An output file demonstrating that your queries work
Please ensure your SQL file runs when the entire file is executed.
Your file names should be L01-lastname-firstname
For example: L01-King-Les.sql and L01-King-Les.output or L01-King-Les.pdf, etc.
Your submission needs to be commented. At a minimum, your comments before each SQL
statement should include the complete question below you are answering.
— Q1: Write a query to display the tomorrow’s date in the following format:
January 10th of year 2019
the result will depend on the day when you RUN/EXECUTE this query. Label the column
— Q2: Define an SQL variable called “tomorrow”, assign it a value of tomorrow’s date and use it
in an SQL statement. Here the question is asking you to use a Substitution variable. Instead of
using the constant values in your queries, you can use variables to store and reuse the values.
See the following example:
select *
from employees
where employee_id = 107;
You can also have the following code:
define emp_id number = 107;
select *
from employees
where employee_id = &emp_id;
After you use the variable, you can undefined the variable:
undefine emp_id;
Define a variable of type datetime:
define toay datetime = sysdate; — Assigning current date to the
today variable.
define tomorrow = sysdate + 1;
— Q3: For each product in category 2, 3, and 5, show product ID, product name, list price, and
the new list price increased by 2%. Display a new list price as a whole number.
In your result, add a calculated column to show the difference of old and new list prices.
Sort the result according to category ID first and then based on product ID.
You output has to match the following result. This result is partially displayed as it has 158
See the result for the first 10 rows.
— Q4: For employees whose manager ID is 2, write a query that displays the employee’s Full
Name and Job Title in the following format:
Summer, Payne is Public Accountant.
Sort the result based on employee ID.
— Q5: For each employee hired before October 2016, display the employee’s last name, hire
date and calculate the number of YEARS between TODAY and the date the employee was hired.
• Label the column Years worked.
• Order your results by the number of years employed. Round the number of
years employed up to the closest whole number.
The output result includes 89 rows. See the partial result (The first 10 rows).
If you get the result in a different order, sort the result first based on the hire date column
and then based on the number of years worked.
— Q6: Display each employee’s last name, hire date, and the review date, which is the first
Tuesday after a year of service, but only for those hired after January 1, 2016.
• Label the column REVIEW DAY.
• Format the dates to appear in the format like:
TUESDAY, August the Thirty-First of year 2016
You can use ddspth to have the above format for the day.
• Sort by review date
The Query returns 107 rows. See the first 10 rows of the output result.
— Q7: For all warehouses, display warehouse id, warehouse name, city, and state. For
warehouses with the null value for the state column, display “unknown”. Sort the result based
on the warehouse ID.
Example Submission
— ***********************
— Name: Your Name
— ID: #########
— Date: The current date
— Purpose: Lab 1 DBS311
— ***********************
— Question 1 – Copy the question from above here
— Question 2 – Copy the question from above here
— Q2 Solution –


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