Question

我有以下的sql查询，但是当我尝试运行查询时，它会抛出一个没有1111的错误，请一些身体帮助。

select count( distinct id_student) count, 
CASE 
    WHEN (date_format(max(expiry_date),'%Y-%m-%d') < CURDATE()) THEN 'Subscription Expired' 
    WHEN (date_format(max(expiry_date),'%Y-%m-%d') >= CURDATE() && sum(completed_test_count) = sum(total_test_count) ) THEN 'Test Completed' 
    WHEN (date_format(max(expiry_date),'%Y-%m-%d') >= CURDATE() && sum(completed_test_count) < sum(total_test_count) ) THEN 'Active' 
END status 
from `order` 
inner join `student` on `id_student` = `order`.`student_id_student` 
inner join `order_has_test` on `order_id_order` = `order`.`id_order` 
inner join `subscription_plan` on `id_subscription_plan` = `subscription_plan_id_subscription_plan` 
where `subscription_plan_id_subscription_plan` = 1 
group by `order`.`student_id_student`, 
CASE 
    WHEN (date_format(max(expiry_date),'%Y-%m-%d') < CURDATE()) THEN 'Subscription Expired' 
    WHEN (date_format(max(expiry_date),'%Y-%m-%d') >= CURDATE() && sum(completed_test_count) = sum(total_test_count) ) THEN 'Test Completed' 
    WHEN (date_format(max(expiry_date),'%Y-%m-%d') >= CURDATE() && sum(completed_test_count) < sum(total_test_count) ) THEN 'Active' 
END

Answer 1

group by应该只包含案例

select count(distinct id_student) count, 
CASE 
    WHEN (date_format(max(expiry_date),'%Y-%m-%d') < CURDATE()) THEN 'Subscription Expired' 
    WHEN (date_format(max(expiry_date),'%Y-%m-%d') >= CURDATE() && sum(completed_test_count) = sum(total_test_count) ) THEN 'Test Completed' 
    WHEN (date_format(max(expiry_date),'%Y-%m-%d') >= CURDATE() && sum(completed_test_count) < sum(total_test_count) ) THEN 'Active' 
END status 
from `order` 
inner join `student` on `id_student` = `order`.`student_id_student` 
inner join `order_has_test` on `order_id_order` = `order`.`id_order` 
inner join `subscription_plan` on `id_subscription_plan` = `subscription_plan_id_subscription_plan` 
where `subscription_plan_id_subscription_plan` = 1 
group by
CASE 
    WHEN (date_format(max(expiry_date),'%Y-%m-%d') < CURDATE()) THEN 'Subscription Expired' 
    WHEN (date_format(max(expiry_date),'%Y-%m-%d') >= CURDATE() && sum(completed_test_count) = sum(total_test_count) ) THEN 'Test Completed' 
    WHEN (date_format(max(expiry_date),'%Y-%m-%d') >= CURDATE() && sum(completed_test_count) < sum(total_test_count) ) THEN 'Active' 
END

Answer 2

在研究并尝试了一些测试用例后，我得到了解决方案。

从（选择计数（id_student）计数中选择计数（计数）计数，状态，案件 WHEN（date_format（max（expiry_date），'％Y-％m-％d'）＆lt; CURDATE（））然后'订阅已过期' WHEN（date_format（max（expiry_date），'％Y-％m-％d'）＆gt; = CURDATE（）＆amp;＆amp; sum（completed_test_count）= sum（total_test_count））然后'测试完成' WHEN（date_format（max（expiry_date），'％Y-％m-％d'）＆gt; = CURDATE（）＆amp;＆amp; sum（completed_test_count）＆lt; sum（total_test_count））THEN'Active' 结束状态来自order student = id_student上的内部联接order。student_id_student order_has_test = order_id_order上的内部联接order。id_order subscription_plan = id_subscription_plan上的内部联接subscription_plan_id_subscription_plan 其中subscription_plan_id_subscription_plan = 1 按order。student_id_student）数据分组按状态分组

常规错误：1111无效使用组功能

2 个答案: