TEST E2E PROGRESS SQL

THIRD CHAPTER

1. What columns are required when using the `UNION` clause in SQL?

2. How does the `UNION` clause treat duplicate rows by default?

What columns are required when using the UNION clause in SQL?

Select the correct answer

Columns must have unique names across all SELECT statements

Columns must have the same number and order in all SELECT statements

Columns must have different data types in each SELECT statement

How does the UNION clause treat duplicate rows by default?

Select the correct answer

It includes all duplicate rows

It randomly selects one instance of each duplicate row to include

It removes duplicate rows

Oliko kaikki selvää?

Miten voimme parantaa sitä?

Kiitos palautteestasi!

Osio 2. Luku 3

Kysy tekoälyä

Kysy tekoälyä

Kysy mitä tahansa tai kokeile jotakin ehdotetuista kysymyksistä aloittaaksesi keskustelumme

Awesome!

Completion rate improved to 16.67

THIRD CHAPTER

Pyyhkäise näyttääksesi valikon

1. What columns are required when using the `UNION` clause in SQL?

2. How does the `UNION` clause treat duplicate rows by default?

What columns are required when using the UNION clause in SQL?

Select the correct answer

Columns must have unique names across all SELECT statements

Columns must have the same number and order in all SELECT statements

Columns must have different data types in each SELECT statement

How does the UNION clause treat duplicate rows by default?

Select the correct answer

It includes all duplicate rows

It randomly selects one instance of each duplicate row to include

It removes duplicate rows

Oliko kaikki selvää?

Miten voimme parantaa sitä?

Kiitos palautteestasi!

Osio 2. Luku 3

some-alt