Course Content
Intermediate SQL
Intermediate SQL
Combining Table Results
In this chapter, we'll practice with the UNION clause. We'll be working with these two tables:
employees:
contractors:
Swipe to show code editor
For practice, your task will be to combine the employees and contractors tables using the UNION clause.
After that, from the resulting table, you should retrieve only those IDs that are multiples of 2. Also, you need to retrieve the first_name and last_name columns. Use the syntax WHERE id % 2 = 0. For this task, you need to use subqueries in the FROM section just as shown in the example.
Good luck!
Note
As a result, you should have 3 columns:
id(an alias for the ID from both tables),first_name,last_name.
Switch to desktop for real-world practiceContinue from where you are using one of the options belowThanks for your feedback!
Combining Table Results
In this chapter, we'll practice with the UNION clause. We'll be working with these two tables:
employees:
contractors:
Swipe to show code editor
For practice, your task will be to combine the employees and contractors tables using the UNION clause.
After that, from the resulting table, you should retrieve only those IDs that are multiples of 2. Also, you need to retrieve the first_name and last_name columns. Use the syntax WHERE id % 2 = 0. For this task, you need to use subqueries in the FROM section just as shown in the example.
Good luck!
Note
As a result, you should have 3 columns:
id(an alias for the ID from both tables),first_name,last_name.
Switch to desktop for real-world practiceContinue from where you are using one of the options belowThanks for your feedback!
Switch to desktop for real-world practiceContinue from where you are using one of the options below