Query's met UNION en INTERSECT

Data-driven beslissingen nemen met SQL

Tim Verdonck

Professor Statistics and Data Science

UNION

Data-driven beslissingen nemen met SQL

Voorbeeld - UNION

SELECT title, 
       genre, 
       renting_price
FROM movies
WHERE renting_price > 2.8
UNION
SELECT title, 
       genre, 
       renting_price
FROM movies
WHERE genre = 'Action & Adventure';
Data-driven beslissingen nemen met SQL
SELECT title, 
       genre, 
       renting_price
FROM movies
WHERE renting_price > 2.8
UNION
SELECT title, 
       genre, 
       renting_price
FROM movies
WHERE genre = 'Action & Adventure';

| title      | genre              | renting_price |
|------------|--------------------|---------------|
|Fool's Gold | Action & Adventure | 2.69          |
|Astro Boy   | Action & Adventure | 2.89          |
|Fair Game   | Drama              | 2.89          |
Data-driven beslissingen nemen met SQL

INTERSECT

Data-driven beslissingen nemen met SQL

Voorbeeld - INTERSECT

SELECT title, 
       genre, 
       renting_price
FROM movies
WHERE renting_price > 2.8
INTERSECT
SELECT title, 
       genre, 
       renting_price
FROM movies
WHERE genre = 'Action & Adventure';

| title     | genre              | renting_price |
|-----------|--------------------|---------------|
| Astro Boy | Action & Adventure | 2.89          |
Data-driven beslissingen nemen met SQL

Laten we oefenen!

Data-driven beslissingen nemen met SQL

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