Filtrar números

SQL intermedio

Jasmin Ludolf

Data Science Content Developer, DataCamp

WHERE

Cláusula de filtrado WHERE

Imagen que muestra una variedad de abrigos de colores

WHERE

WHERE color = 'green'

Imagen que muestra una variedad de abrigos de colores y con un círculo alrededor del abrigo verde

WHERE con operadores de comparación

SELECT title
FROM films
WHERE release_year > 1960;

|title                |
|---------------------|
|Judgment at Nuremberg|
|Pocketful of Miracles|
|The Hustler          |
|The Misfits          |
...

Operadores de comparación

SELECT title
FROM films
WHERE release_year < 1960;

|title                                          |
|-----------------------------------------------|
|Intolerance:Love's Struggle Throughout the Ages|
|Over the Hill to the Poorhouse                 |
|The Big Parade                                 |
|Metropolis                                     |
...

Operadores de comparación

SELECT title
FROM films
WHERE release_year <= 1960;

|title                                          |
|-----------------------------------------------|
|Intolerance:Love's Struggle Throughout the Ages|
|Over the Hill to the Poorhouse                 |
|The Big Parade                                 |
|Metropolis                                     |
...

Operadores de comparación

SELECT title
FROM films
WHERE release_year = 1960;

|title        |
|-------------|
|Elmer Gantry |
|Psycho       |
|The Apartment|

Operadores de comparación

SELECT title
FROM films
WHERE release_year <> 1960;

|title                                          |
|-----------------------------------------------|
|Intolerance:Love's Struggle Throughout the Ages|
|Over the Hill to the Poorhouse                 |
|The Big Parade                                 |
|Metropolis                                     |
...

Operadores de comparación

> mayor que o posterior a
< menor que o anterior a
= igual a
>= mayor que o igual a
<= menor que o igual a
<> no es igual a

WHERE con cadenas

Utiliza comillas simples alrededor de las cadenas que queremos filtrar

SELECT title
FROM films
WHERE country = 'Japan';

|title            |
|-----------------|
|Seven Samurai    |
|Tora! Tora! Tora!|
|Akira            |
|Madadayo         |
|Street Fighter   |
...

Orden de ejecución

-- Written code:
SELECT item
FROM coats
WHERE color = 'green'
LIMIT 5;

Orden de ejecución:

```
FROM coats
```
```
WHERE color = 'green'
```
```
SELECT item
```
```
LIMIT 5;
```

¡Vamos a practicar!

SQL intermedio