1111 - 无效使用组功能

Question

我有多个表，我想检查分配给用户的文件数量，他今天没有处理过这些文件。我已经写了下面的查询，但我得到了一个错误

1111 - 无效使用组功能

SELECT t2.id as id,t2.task_date,t3.id as debtor_id,t1.cfid as cfid, t2.cfid,t2.case_file,t2.scheduled_action,t2.debtor 
FROM task_list t2 
INNER JOIN case_files t1 
ON t2.cfid=t1.cfid 
INNER JOIN case_file_allocations t3 
ON t2.cfid=t3.cfid 
WHERE t2.worked<>'yes' 
AND MAX(t2.task_date) < NOW() 
AND t2.acm=t3.acm 
AND t2.acm='310'  
AND t2.deleted<>1 
AND t1.closed<>'yes' 
AND t1.deleted<>1 
AND t1.pool_id IN(0,1) 
AND t3.reallocated<>'yes'  
ORDER BY t2.task_date ASC

请为我检查错误

Answer 1

您不能在where子句中使用聚合函数。如果你想这样做，你需要：

定义分组字段（即添加group by子句）
将任何条件放在having子句中的分组或聚合字段中。

select查询的正确语法是：

SELECT -- Your fields and/or expressions
FROM -- Your data sources (tables, views and/or subqueries), and joins
WHERE -- Conditions on the "raw" data
GROUP BY -- Grouping fields
HAVING -- Conditions on grouped and/or aggregated data
ORDER BY -- Ordering fields

如果您想要最后task_list为24小时的task_date条记录：

select id, max(task_date) as max_task_date
from task_list
where 
    task_date <= date_add(now(), interval -1 day)
    -- maybe you need something like: task_date <= date_add(curdate(), interval -1 day)
group by id;

我留给你剩下的......你可以把这个结果和你的其他桌子一起来获得你需要的信息。

Answer 2

使用子查询获取每个案例文件的最大日期，然后计算外部查询中符合条件的数量：

select count(*)
from (
  SELECT t1.cfid as cfid, MAX(t2.task_date) d
  FROM task_list t2 
  INNER JOIN case_files t1 ON t2.cfid=t1.cfid 
  INNER JOIN case_file_allocations t3 ON t2.cfid=t3.cfid 
  WHERE t2.worked<>'yes' AND t2.acm=t3.acm AND t2.acm='310' AND t2.deleted<>1 
    AND t1.closed<>'yes' AND t1.deleted<>1 AND t1.pool_id IN(0,1) 
    AND t3.reallocated<>'yes'
  group by t1.cfid) a
where d < NOW();

如何计算最近一次处理的文件数量是昨天

1111 - 无效使用组功能

2 个答案: