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Combining Table Results | Nested Subqueries
Intermediate SQL
course content

Course Content

Intermediate SQL

Intermediate SQL

1. Grouping
2. Nested Subqueries
3. Joining Tables
4. DDL and DML in SQL

bookCombining Table Results

In this chapter, we'll practice with the UNION clause. We'll be working with these two tables:

employees:

contractors:

Task

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.

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Section 2. Chapter 6
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bookCombining Table Results

In this chapter, we'll practice with the UNION clause. We'll be working with these two tables:

employees:

contractors:

Task

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 desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

Section 2. Chapter 6
toggle bottom row

bookCombining Table Results

In this chapter, we'll practice with the UNION clause. We'll be working with these two tables:

employees:

contractors:

Task

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 desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

In this chapter, we'll practice with the UNION clause. We'll be working with these two tables:

employees:

contractors:

Task

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 desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Section 2. Chapter 6
Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
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