Limiting results with LIMIT
The LIMIT command is used in SQL to restrict the number of records returned by a query. This is especially useful for optimizing data retrieval when you only need a portion of the results.
Syntax of the LIMIT command
The basic syntax for using LIMIT is:SELECT [columns] FROM [table] LIMIT [number];
Where [number] represents the quantity of records you wish to retrieve.
Purpose of the LIMIT command
The LIMIT command allows you to:
- Control the number of records returned by a query.
- Improve database performance by limiting results.
- Facilitate result pagination in web applications.
Exercises
Interactive Test 1: Drag and Drop.
Arrastra en el orden correspondiente.
Arrastra las opciones:
SELECT
FROM
clientes
LIMIT
5
Completa el código:
______
______
______
______
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Interactive Test 2: Fill in the Blanks
Rellena los huecos en cada casilla.
SELECT FROM LIMIT ;
Practical Exercise:
Statement:
Write the necessary Query to display the first 10 clients from the 'clientes' table.
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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