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Update the name of the Branches table that you created in the previous lab to say Department. Use an ALTER statement to successfully RENAME the
Update the name of the Branches table that you created in the previous lab to say "Department".
Use an ALTER statement to successfully RENAME the "Branches" table to "Department".
Capture these outputs in a screenshot to validate that youve successfully completed this step.
Insert fields to the Department table so that youll be able to perform joins on them.
INSERT INTO Department VALUES
'Accounting'
'Human Resources'
'Information Systems'
'Marketing';
Write a SELECT statement for this table to prove this step, and validate that it ran correctly with a screenshot.
Now, perform joins between the Department and Employee tables and show results for how many employees work in each one of the four departments. This will only provide information on the records that are already there.
Department Accounting
Command: SELECT FirstName, LastName, Department.DepartmentName FROM Employee INNER JOIN Department ON Employee.DepartmentID Department.DepartmentID WHERE Employee.DepartmentID ;
Using SELECT statements similar to the one above, perform joins to produce results for the following tables:
Department Human Resources
Department Information Systems
Department Marketing
Capture the results of these joins and validate your work by providing a screenshot. You should have the same number of records as you do employees.
Populate the Employee table with information for ten new employees.
Give them unique names and include attributes for all necessary fields. Note: Please reference attributes from the lab in Module Two. Department ID values must be between and
Perform a join across the Employee and Department Tables for each of the four departments. New and existing records should be displayed in the results.
Take a screenshot to capture the updated results that the Employee and Department joins show to validate that they have run correctly. You should have the same number of records as you do employees.
Identify the resultant outputs of the commands that youve written:
How many records are returned for employees in each department?
Create a CSV file that contains only the records of employees in Human Resources and Information Systems. If you run this query multiple times, be sure to use a different file name each time. MySQL will not overwrite an existing file.
Enter the command listed below.
Command: select FirstName, LastName, Department.DepartmentName from Employee inner join Department on Employee.DepartmentID Department.DepartmentID where Employee.DepartmentID OR Employee.DepartmentID into outfile'homecodioworkspaceHRandISEmployees.csv FIELDS TERMINATED BY LINES TERMINATED BY r
;
Print the file output to the screen.
In order to print your screen, start by refreshing your browser.
Youll need to type the word quit after your MySQL prompt and then press Enter to exit to the Linux shell. Do not exit the virtual lab environment itself.
Next, print the output of your file to the screen by following these steps:
Type pwd and press Enter, then type ls and press Enter again. This will list your files.
Now, type cat HRandISEmployees.csv and press Enter.
Capture these outputs in a screenshot to validate that youve successfully completed this step.
Reflection: Provide detailed insight on the prompts below by explaining your process along with how and why it ultimately worked.
Process
Explain how the joins you used in this assignment worked.
Describe why the commands you used were able to retrieve the Department table when you selected the Department name.
File creation and extraction
Identify how many records are in the file when you write the records of your query to a CSV file.
Explain, in detail, the process of extracting data to a flat file.
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