查找出现在某个时期而不是另一个时期的用户 ID

Question

鉴于 table tbl_orders 包含多个月的订单详细信息，什么是最有效的 SQL 查询来获取出现在给定时期 BETWEEN 2019-01-01 AND 2019-01-31 但没有出现在另一个时期 BETWEEN 2019-02-01 AND 2019-02-28.

日期列是 orderDate

我试过自行加入，但 returns 什么都没有

SELECT DISTINCT a.userID
FROM tbl_orders a,
     tbl_orders b
WHERE a.orderDate BETWEEN 2019-01-01 AND 2021-01-31
  AND b.orderDate
    NOT BETWEEN 2019-02-01 AND 2019-02-28;

Answer 1

可能是这个：

SELECT userID
FROM tbl_orders
WHERE orderDate BETWEEN '2019-01-01' AND '2019-02-28'
GROUP BY userID
HAVING MAX(orderDate) <= '2019-01-31'

Answer 2

您可以使用 NOT EXISTS

你的日期有误必须有单引号

SELECT DISTINCT a.userID
FROM tbl_orders a 
WHERE a.orderDate BETWEEN '2019-01-01' AND '2021-01-31'
  AND NOT EXISTS(SELECT 1 FROM tbl_orders WHERE orderDate
    BETWEEN '2019-02-01' AND '2019-02-28');

查找出现在某个时期而不是另一个时期的用户 ID

Find user ID's who appear in a certain period and not in another

mysql

sql

self-join

between