Sql 按状态分组的社区计数

我有一个表，有邻居和状态列

我想得到以下3列： 邻居的名字， 计算打开的状态， 计数状态已关闭

到目前为止，我有以下，它不工作

select _c20 AS Neighborhood, 
  COUNT(select _c20 from events311_default_tbl WHERE _c5 = "Open" GROUP BY Neighborhood),
  COUNT(select _c20 from events311_default_tbl WHERE _c5 = "Closed" GROUP BY Neighborhood)
from events311_default_tbl
GROUP BY Neighborhood

---

我认为您只需要条件聚合：

SELECT _c20 as Neighborhood, 
       SUM(CASE WHEN _c5 = 'Open' THEN 1 ELSE 0 END) as num_open,
       SUM(CASE WHEN _c5 = 'Closed' THEN 1 ELSE 0 END) as num_closed
FROM events311_default_tbl
GROUP BY Neighborhood;

---

我认为您只需要条件聚合：

SELECT _c20 as Neighborhood, 
       SUM(CASE WHEN _c5 = 'Open' THEN 1 ELSE 0 END) as num_open,
       SUM(CASE WHEN _c5 = 'Closed' THEN 1 ELSE 0 END) as num_closed
FROM events311_default_tbl
GROUP BY Neighborhood;

---

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