我有一个疑问:
SELECT t1.id,
t3.title,
Count(t2.city_id) AS objectsCount
FROM geo_data AS t1
INNER JOIN object AS t2
ON t1.uid = t2.city_id
AND t2.is_blocked = 0
JOIN geo_data_translation AS t3
ON t1.id = t3.id
AND t3.language_id = 'de'
WHERE t1.is_city = 1
GROUP BY name;
结果是:
+-----+------------------------------+--------------+
| id | title | objectsCount |
+-----+------------------------------+--------------+
| 404 | Achim | 1 |
| 85 | Ahrensburg | 3 |
| 305 | Ahrensfelde | 2 |
| 471 | Aichach | 1 |
| 377 | Alfeld (Leine) | 1 |
| 373 | Algermissen | 2 |
| 465 | Allershausen | 1 |
| 525 | Alsheim | 1 |
| 152 | Altenmoor | 1 |
| 482 | Anzing | 1 |
| 518 | Armsheim | 3 |
| 562 | Arnsdorf | 1 |
| 109 | Artlenburg | 1 |
| 476 | Aschheim | 1 |
| 224 | Asendorf | 1 |
| 436 | Augusta | 1 |
| 447 | Aystetten | 1 |
| 360 | Banteln | 1 |
我们看到的是一个城市列表及其对象数量。 Achim 市有 1 个对象，Ahrensburg 有 3 个对象，依此类推
我想做的是获取所有列出的城市的总对象数。 谢谢
最佳答案
select t1.title,sum(t1.objectscount)as 'total_count' from table1 t1
group by t1.title
关于Mysql查询获取对象总数，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/21019274/