2.3 KiB
2.3 KiB
title | localeTitle |
---|---|
SQL In Operator | SQL en el operador |
SQL en el operador
Operador IN definido
El operador IN
se utiliza en un WHERE
o HAVING
(como parte de GROUP BY
) para limitar las filas seleccionadas a los elementos "IN" de una lista.
Aquí está la lista completa actual de estudiantes para comparar con el conjunto de resultados de la cláusula WHERE
:
select studentID, FullName, sat_score, rcd_updated from student;
+-----------+------------------------+-----------+---------------------+
| studentID | FullName | sat_score | rcd_updated |
+-----------+------------------------+-----------+---------------------+
| 1 | Monique Davis | 400 | 2017-08-16 15:34:50 |
| 2 | Teri Gutierrez | 800 | 2017-08-16 15:34:50 |
| 3 | Spencer Pautier | 1000 | 2017-08-16 15:34:50 |
| 4 | Louis Ramsey | 1200 | 2017-08-16 15:34:50 |
| 5 | Alvin Greene | 1200 | 2017-08-16 15:34:50 |
| 6 | Sophie Freeman | 1200 | 2017-08-16 15:34:50 |
| 7 | Edgar Frank "Ted" Codd | 2400 | 2017-08-16 15:35:33 |
| 8 | Donald D. Chamberlin | 2400 | 2017-08-16 15:35:33 |
| 9 | Raymond F. Boyce | 2400 | 2017-08-16 15:35:33 |
+-----------+------------------------+-----------+---------------------+
9 rows in set (0.00 sec)
Se presentarán las filas que tienen un puntaje SAT en esta lista (1000, 2400):
select studentID, FullName, sat_score, rcd_updated
from student
where sat_score in (1000, 2400);
+-----------+------------------------+-----------+---------------------+
| studentID | FullName | sat_score | rcd_updated |
+-----------+------------------------+-----------+---------------------+
| 3 | Spencer Pautier | 1000 | 2017-08-16 15:34:50 |
| 7 | Edgar Frank "Ted" Codd | 2400 | 2017-08-16 15:35:33 |
| 8 | Donald D. Chamberlin | 2400 | 2017-08-16 15:35:33 |
| 9 | Raymond F. Boyce | 2400 | 2017-08-16 15:35:33 |
+-----------+------------------------+-----------+---------------------+
4 rows in set (0.00 sec)