Filters and conditions with WHERE
In SQL, the WHERE clause is used to filter records and determine which rows will be returned in query results.
Using the WHERE clause
The syntax for using WHERE is as follows:SELECT [columns] FROM [table] WHERE [condition];
Filter Examples
- Get all clients under 25 years old:
SELECT * FROM clients WHERE age < 25; - Get products with a price greater than 100:
SELECT * FROM products WHERE price > 100;
Exercises
Interactive Test 1: Drag and Drop.
Arrastra en el orden correspondiente.
Arrastra las opciones:
SELECT
age < 25
WHERE
FROM
clients
*
Completa el código:
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Interactive Test 2: Fill in the Blanks
Rellena los huecos en cada casilla.
SELECT FROM WHERE ;
Practical Exercise:
Statement:
Write the necessary Query (consultation) to display all clients in a table who are under 25 years old.
Datos de Ejemplo
| id | name | age |
|---|---|---|
| 1 | Juan | 25 |
| 2 | Ana | 30 |
| 3 | Luis | 22 |
| 4 | Marta | 35 |
* Escribe tu consulta SQL y ejecuta para ver los resultados.
Resultados:
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