如何计算满足条件的列中的所有值？ （源码）

Question

我有一张表，其中包含该国所有病房中一组不同工作领域的工人数量。如何找到超过x工人数量的病房数量（跨所有工作领域）？ 我当前的查询如下所示：

SELECT
  (SELECT COUNT(1) FROM Table WHERE
    (SELECT SUM(working) FROM Table GROUP BY table.ward) > x)
AS working FROM Table;

Answer 1

select count(ward) 
from
(SELECT ward FROM Table
 GROUP BY ward having SUM(working) > x) t

Answer 2

SELECT ward, SUM(working) 
FROM YourTable 
GROUP BY ward
HAVING SUM(working) > @x

Answer 3

SELECT COUNT(*)
FROM
(
    SELECT SUM(working) AS totalWorking
    FROM Table 
    GROUP BY table.ward
) workingPerWard
WHERE workingPerWard.totalWorking > x