感谢任何帮助。我试图在 CASE 语句中使用 max(date) 但语法不正确或者 ??
// This works
SELECT
ROUND(sum(CASE WHEN Document_Date BETWEEN DATE_FORMAT("2019-01-01", "%Y-%m-%d") AND DATE_FORMAT("2019-01-31", "%Y-%m-%d") THEN GTotal END),0) TOTAL2019
FROM
salesdata
// But I want to use max(Document_Date) which is 2019-01-31 like so and have tried cast and different combos, but it comes out null or says invalid use of group function. Document_Date is datetime in DB
SELECT
ROUND(sum(CASE WHEN Document_Date BETWEEN DATE_FORMAT("2019-01-01", "%Y-%m-%d") AND DATE_FORMAT(max(Document_Date), "%Y-%m-%d") THEN GTotal END),0) TOTAL2019
FROM
salesdata
我做错了什么 - 感谢您的帮助。
最佳答案
您正在尝试将 max
聚合与 sum
结合使用。一般来说,如果不使用子查询就无法做到这一点。
检查我的替代解决方案
SELECT
ROUND(sum(
CASE WHEN Document_Date BETWEEN DATE_FORMAT("2019-01-01", "%Y-%m-%d") AND (select max(Document_date) from salesData) THEN
GTotal
END),
0) TOTAL2019
FROM
salesdata
关于MySQL 在 Between 语句中使用 max(date),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/54684241/