小编use*_*884的帖子

我收到错误：#1242 - 当我运行此 sql 时，子查询返回超过 1 行。

CREATE VIEW test 
AS 
  SELECT cc_name, 
         COUNT() AS total, 
         (SELECT COUNT(*) 
            FROM bed 
           WHERE respatient_id > 0 
        GROUP BY cc_name) AS occupied_beds, 
         (SELECT COUNT(*) 
            FROM bed 
           WHERE respatient_id IS NULL 
        GROUP BY cc_name) AS free_beds 
    FROM bed 
GROUP BY cc_name;