Create a View to show the city name of any location that has a department. Only show the city name once in the results. You must use a non-correlated subquery.
SQL
SQL stands for Structured Query Language, is a form of communication that uses queries structured in a specific format to store, manage & retrieve data from a relational database.
Queries
A query is a type of computer programming language that is used to retrieve data from a database. Databases are useful in a variety of ways. They enable the retrieval of records or parts of records, as well as the performance of various calculations prior to displaying the results. A search query is one type of query that many people perform several times per day. A search query is executed every time you use a search engine to find something. When you press the Enter key, the keywords are sent to the search engine, where they are processed by an algorithm that retrieves related results from the search index. Your query's results are displayed on a search engine results page, or SER.
SQL
Question 1)
Create a View to show the city name of any location that has a department. Only show the city name once in the results. You must use a non-correlated subquery.
Call this view: Department_Locations
Include a second query to display from the View after it is created.
Output: 1 view created. Display result from the view, 7 records.
Question 2)
Create a View to show all the first and last names of managers and the count of their employees. Order the result by the highest number of employees first.
You must use a correlated Subquery to obtain the employee count on each row.
(Hint: put the subquery in the SELECT)
You may have a lot of results with 0, that’s fine.
Use the View to rename:
first_name to “First Name”,
last_name to “Last Name”
Employee count result to “Employee Count”
Call this view: Management_Employee_Counts
Include a second query to display from the View after it is created.
Output will be : 1 view created.Display result from the view… see next page for partial results (108 rows returned in total)
Example data: attached picture.
Step by step
Solved in 3 steps with 1 images
