mysql计数帮助

Question

我正在尝试计算表中有一个区域的行数，我该如何实现这一点，我目前已经编写了这个查询，

SELECT DISTINCT area 
  FROM cv 
 WHERE status = 'SHOW' 
   AND is_complete = 'TRUE' 
ORDER BY area ASC

此查询当前返回

area
------------------
West Yorkshire  
Lanchashire  

我想要的是，

area             Number
------------------------
West Yorkshire   19000  
Lancashire       7000

Answer 1

select area, count(*)
from cv
where status = 'SHOW' 
    and is_complete = 'TRUE' 
group by area

Answer 2

SELECT area, COUNT(area)
  FROM cv
WHERE status = 'SHOW'
  AND is_complete = 'TRUE'
GROUP BY area

区域计数将仅计算非空值

Answer 3

SELECT area, COUNT(area)
  FROM cv
WHERE status = 'SHOW'
  AND is_complete = 'TRUE'
  AND area IS NOT NULL
GROUP BY area

Answer 4

sql distinct将仅列出表中的不同值，原始查询将需要具有count（）和group by：

SELECT DISTINCT area, count(*) 
  FROM cv
.....

group by area

或者，Red Filer和gkrogers的答案也很好。