如果mysql为Null，则获取包含计数的组名

我正在尝试将状态计数获取为0，该计数不在表中：

我的表格：

id   |    status    |
----------------------
1         Open      
2         Closed    
3         Closed
4         Open
----------------------

预期结果：

statusname   |    statuscount   |
---------------------------------
Open              2
Closed            2
Cancelled         0
Rejected          0
---------------------------------

我试过：

SELECT COUNT(status), status FROM in_e_s_s__p_c_ns
WHERE status IN ("Open","Closed","Rejected","Cancelled") GROUP BY status

---

您需要有一个交付的表方法和一个左连接，这样才能工作

SELECT 
   status_records.status AS statusname
 , COUNT(*) AS statuscount   
FROM (

  SELECT 
   'Open' AS status
  UNION ALL
  SELECT 
   'Closed' AS status
  UNION ALL
  SELECT 
   'Rejected' AS status
  UNION ALL
  SELECT 
   'Cancelled' AS status
) AS status_records

LEFT JOIN 
 myTable
ON
 status_records.status = myTable.status
GROUP BY
 status_records.status

---

您是如何在预期输出中获得statusname“Cancelled”和“Rejected”的，这与示例数据有何关系？这里没有所谓的“取消”和“拒绝”。。或者“取消”和“拒绝”是由（“打开”、“关闭”、“拒绝”、“取消”）中的

生成的，这意味着它应该是动态的吗？我使用上述四种状态。如果表中不存在状态名称Cancelled and Rejected，则应将其视为0