用戶總數在MySQL

我需要在判決季度看到註冊用戶用戶總數在MySQL

如： - 季度「一月至三月」：20

如： - 季度「四月至六月」：30

id = id_ju1 
registration date =date_regis 
table = master 

SELECT count(DISTINCT(id_ju1)), 
CASE 
WHEN month(date_regis) >=1 and month(date_regis) <=3 THEN 'Jan-Mar' 
WHEN month(date_regis) >=4 and month(date_regis) <=6 THEN 'Apr-Jun' END 
FROM master

來源

2016-10-28 FERNANDO ORTIZ

您可以用四分之一的功能這一點。

Dates that have a month of Jan-Mar would return 1. 
Dates that have a month of Apr-Jun would return 2. 
Dates that have a month of Jul-Sep would return 3. 
Dates that have a month of Oct-Dec would return 4.

參見：https://www.techonthenet.com/mysql/functions/quarter.php

SELECT QUARTER(date_regis) AS quarter, COUNT(DISTINCT(id_ju1)) AS idcount 
FROM master 
GROUP BY QUARTER(date_regis) 
ORDER BY QUARTER(date_regis)

來源

2016-10-28 08:33:27

您好，感謝您的回答，我跑好了，我還有一個問題，也說明我季度0：當我刪除了第一個元素 –

請記住這是正確的。如果你有答案。 –

感謝您的回覆。爲什麼在這裏你想要零？ –

嘗試類似波紋管：

SELECT count(DISTINCT(id_ju1)) 
FROM 
(
SELECT ID_JUN1, 
CASE 
WHEN month(date_regis) >=1 and month(date_regis) <=3 THEN 'jun-mar' 
WHEN month(date_regis) >=4 and month(date_regis) <=6 THEN 'mar-jun' END AS Quarter 
FROM master 
) 
GROUP BY Quarter

來源

2016-10-28 08:31:07

用戶總數在MySQL

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