在加入條件我想使用group by和having子句但得到錯誤？如何使用group by和條款

Question

當我想從表it_Service_ticket中獲取數據時。該錯誤是「具有條款」

如何使用由具有條件組和

未知列「it_service_ticket.xetr」？請幫我

SELECT Assignedto,COUNT(Assignedto) as TC 
,CONCAT(count(case when STATUS = 'CLOSE' then 1 else null end) * 100/count(1), '%') as SC 
,CONCAT(count(case when STATUS = 'PENDING' then 1 else null end) * 100/count(1), '%') as PC 
,SUM(TIMESTAMPDIFF(MINUTE,Request_Date, Xetr))/60 as WH ,(540-sum(TIMESTAMPDIFF(MINUTE,Request_Date, Xetr)))/60 as VH, 
COUNT(Feedback_Rate)/COUNT(Assignedto)*100 as Feed_Percent, 
SUM(Feedback_Rate)/(count(Feedback_Rate)*5)*5 as AVG_Feedback 
FROM `it_service_ticket` 
INNER JOIN `it_problem` 
ON `it_service_ticket`.`it_problem_id`=`it_problem`.`it_problem_id` 
INNER JOIN `city_master` 
ON `it_service_ticket`.cityid=`city_master`.city_id 

GROUP BY Assignedto 
HAVING `it_service_ticket`.`xetr` BETWEEN '2017-01-01 12:00:00 AM' AND '2017-03-31 12:00:00 PM' 
       ; 

Answer 1

我覺得你只是想where，不having：

SELECT Assignedto, COUNT(Assignedto) as TC, 
     CONCAT(AVG(STATUS = 'CLOSE') * 100, '%') as SC, 
     CONCAT(AVG(STATUS = 'PENDING') * 100, '%') as PC, 
     SUM(TIMESTAMPDIFF(MINUTE, Request_Date, Xetr))/60 as WH , 
     (540-SUM(TIMESTAMPDIFF(MINUTE, Request_Date, Xetr)))/60 as VH, 
     COUNT(Feedback_Rate)/COUNT(Assignedto)*100 as Feed_Percent, 
     SUM(Feedback_Rate)/(count(Feedback_Rate)*5)*5 as AVG_Feedback 
FROM it_service_ticket st INNER JOIN 
    it_problem` p 
    ON st.it_problem_id = p.it_problem_id INNER JOIN 
    `city_master` cm 
    ON st.cityid = cm.city_id 
WHERE st.xetr BETWEEN '2017-01-01 00:00:00' AND '2017-03-31 12:00:00' 
GROUP BY Assignedto; 

一般情況下，只使用HAVING當你在聚合函數的過濾。

注：

• 我簡化了邏輯，用於計算比率。您可能想要使用format()來獲取特定的小數位數。
• 如果沒有必要，請勿使用反引號。他們只是使查詢更難寫和讀。
• 同樣，表別名使查詢更易於編寫和閱讀。
• 使用24小時時間格式 - 更不容易出錯。
• 我懷疑Feed_Percent的計算是否正確。 COUNT()計數非NULL值的數量，所以他們比很可能是1

Answer 2

你必須在選擇字段添加Xetr。沒有使用這個，你不能使用having條件與Xetr。
試試這個

SELECT Assignedto,COUNT(Assignedto) as TC 
,CONCAT(count(case when STATUS = 'CLOSE' then 1 else null end) * 100/count(1), '%') as SC 
,CONCAT(count(case when STATUS = 'PENDING' then 1 else null end) * 100/count(1), '%') as PC 
,SUM(TIMESTAMPDIFF(MINUTE,Request_Date, Xetr))/60 as WH ,(540-sum(TIMESTAMPDIFF(MINUTE,Request_Date, Xetr)))/60 as VH, 
COUNT(Feedback_Rate)/COUNT(Assignedto)*100 as Feed_Percent, 
SUM(Feedback_Rate)/(count(Feedback_Rate)*5)*5 as AVG_Feedback,Xetr 
FROM `it_service_ticket` 
INNER JOIN `it_problem` 
ON `it_service_ticket`.`it_problem_id`=`it_problem`.`it_problem_id` 
INNER JOIN `city_master` 
ON `it_service_ticket`.cityid=`city_master`.city_id 

GROUP BY Assignedto 
HAVING `it_service_ticket`.`Xetr` BETWEEN '2017-01-01 12:00:00 AM' AND '2017-03-31 12:00:00 PM'; 

但筆者認爲，你必須使用在如我下面提到的性能條款Xetr：

SELECT Assignedto,COUNT(Assignedto) as TC 
,CONCAT(count(case when STATUS = 'CLOSE' then 1 else null end) * 100/count(1), '%') as SC 
,CONCAT(count(case when STATUS = 'PENDING' then 1 else null end) * 100/count(1), '%') as PC 
,SUM(TIMESTAMPDIFF(MINUTE,Request_Date, Xetr))/60 as WH ,(540-sum(TIMESTAMPDIFF(MINUTE,Request_Date, Xetr)))/60 as VH, 
COUNT(Feedback_Rate)/COUNT(Assignedto)*100 as Feed_Percent, 
SUM(Feedback_Rate)/(count(Feedback_Rate)*5)*5 as AVG_Feedback,Xetr 
FROM `it_service_ticket` 
INNER JOIN `it_problem` 
ON `it_service_ticket`.`it_problem_id`=`it_problem`.`it_problem_id` 
INNER JOIN `city_master` 
ON `it_service_ticket`.cityid=`city_master`.city_id 
where `it_service_ticket`.`Xetr` BETWEEN '2017-01-01 12:00:00 AM' AND '2017-03-31 12:00:00 PM' 
GROUP BY Assignedto;