如何仅使用最后一个事务计数timediff mysql 5.7

这是我的问题

这是我的小提琴

我有这张桌子

CREATE TABLE test (
  ID INT,
  user_id INT,
  createdAt DATE,
  status_id INT
);

INSERT INTO test VALUES
  (1, 13, '2020-01-01', 8),
  (2, 13, '2020-01-03', 8),
  (3, 13, '2020-01-06', 8),
  (4, 13, '2020-01-02', 7),
  (5, 13, '2020-01-03', 7),
  (6, 14, '2020-03-03', 8),
  (7, 13, '2020-03-04', 4),
  (8, 15, '2020-04-04', 7),
  (9, 14, '2020-03-02', 6),
  (10, 14, '2020-03-10', 5),
  (11, 13, '2020-04-10', 8);
  
select * from test where status_id != 7
order by createdAt;


+----+---------+------------+-----------+
| ID | user_id | createdAt  | status_id |
+----+---------+------------+-----------+
|  1 |      13 | 2020-01-01 |         8 |
|  2 |      13 | 2020-01-03 |         8 |
|  3 |      13 | 2020-01-06 |         8 |
|  9 |      14 | 2020-03-02 |         6 |
|  6 |      14 | 2020-03-03 |         8 |
|  7 |      13 | 2020-03-04 |         4 |
| 10 |      14 | 2020-03-10 |         5 |
+----+---------+------------+-----------+

id是事务的id，user_id是执行事务的用户的id，createdAt是事务发生的日期，status_id是事务的状态如果status_id为7，则事务被拒绝或未批准

所以在这种情况下，我想找出从“2020-02-01”到“2020-04-01”的时间范围内每个重复用户上的每个审批事务的时差，重复用户是在时间范围结束之前进行事务处理的用户，在这种情况下，在时间范围内至少再次进行一次事务处理，用户在“2020-04-01”之前进行审批交易，并且在“2020-02-01”和“2020-04-01”之间至少再进行一次审批交易

对于这个问题，我根据@Akina的答案使用了这个查询

-- Get pairs (current transaction, previous transaction) for these users

SELECT t1.user_id, 
       t1.createdAt, 
       t2.createdAt,
       DATEDIFF(t2.createdAt, t1.createdAt) diff
-- table for a transaction
FROM test t1
-- table for prev. transaction
JOIN test t2 ON t1.user_id = t2.user_id 
            AND t1.createdAt < t2.createdAt
            AND 7 NOT IN (t1.status_id, t2.status_id)
-- get data only for users from prev. query
JOIN (SELECT t3.user_id
      FROM test t3
      WHERE t3.status_id != 7
      GROUP BY t3.user_id
      HAVING SUM(t3.createdAt < '2020-04-01') > 1
         AND SUM(t3.createdAt BETWEEN '2020-02-01' AND '2020-04-01')) t4 ON t1.user_id = t4.user_id
-- check that there is no approved transaction between selected transactions
WHERE NOT EXISTS (SELECT NULL
                   FROM test t5
                   WHERE t1.user_id = t5.user_id
                     AND t5.status_id != 7
                     AND t1.createdAt < t5.createdAt
                     AND t5.createdAt < t2.createdAt)

the output table was like this 
+----------+------------+------------+------+
|  user_id | createdAt  | createdAt  | diff |
+----------+------------+------------+------+
|       13 | 2020-01-01 | 2020-01-03 |    2 |
|       13 | 2020-01-03 | 2020-01-06 |    3 |
|       14 | 2020-03-02 | 2020-03-03 |    1 |
|       13 | 2020-01-06 | 2020-03-04 |   58 |
|       14 | 2020-03-03 | 2020-03-10 |    7 |
+----------+------------+------------+------+

---

我认为您只需要排除在“2020-02-01”和“2020-04-01”之间的时间框架开始之前结束的所有交易，因为它们不感兴趣。 因为你已经排除了所有超出时间范围的事情

您仍然知道在事务开始和结束时输入数据的时间，因此您应该在一个额外的列中标记与一起属于的行，这将使您的查询更加简单，并且您的状态不可用，因为它会重复自身

小提琴

更新：

现在这实际上更有意义了

---

Dfiddle

很抱歉，我忘了在2020-04-10之前不将“2020-03-04”之间的用户id传输差异放在“2020-04-10”之间，因为“2020-04-10”超出了“2020-02-01”到“2020-04-10”的范围，我想在最后一个查询中添加并创建比较<'2020-04-10'，但它说的是Unknown coloumn createcompare Yes，这更有意义，我已经更新了答案非常感谢先生，这是我想要的，给你奖金，提前谢谢

+---------+------------+------------+------+
| user_id | createdAt  | createdAt  | diff |
+---------+------------+------------+------+
|      14 | 2020-03-02 | 2020-03-03 |    1 |
|      13 | 2020-01-06 | 2020-03-04 |   58 |
|      14 | 2020-03-03 | 2020-03-10 |    7 |
+---------+------------+------------+------+

SELECT t1.user_id, 
       t1.createdAt, 
       t2.createdAt createcompare,
       DATEDIFF(t2.createdAt, t1.createdAt) diff
-- table for a transaction
FROM test t1
-- table for prev. transaction
JOIN test t2 ON t1.user_id = t2.user_id 
            AND t1.createdAt < t2.createdAt
            AND 7 NOT IN (t1.status_id, t2.status_id)
JOIN (SELECT t3.user_id
      FROM test t3
      WHERE t3.status_id != 7
      GROUP BY t3.user_id
      HAVING SUM(t3.createdAt < '2020-04-01') > 1
         AND SUM(t3.createdAt BETWEEN '2020-02-01' AND '2020-04-01')) t4 ON t1.user_id = t4.user_id
WHERE NOT EXISTS (SELECT NULL
                   FROM test t5
                   WHERE t1.user_id = t5.user_id
                     AND t5.status_id != 7
                     AND t1.createdAt < t5.createdAt
                     AND t5.createdAt < t2.createdAt) 
HAViNG createcompare > '2020-02-01'

user_id | createdAt | cretecompare | diff ------: | :--------- | :----------- | ---: 14 | 2020-03-02 | 2020-03-03 | 1 13 | 2020-01-06 | 2020-03-04 | 58 14 | 2020-03-03 | 2020-03-10 | 7 13 | 2020-03-04 | 2020-04-10 | 37

SELECT t1.user_id, 
       t1.createdAt cretecompare1, 
       t2.createdAt cretecompare2,
       DATEDIFF(t2.createdAt, t1.createdAt) diff
-- table for a transaction
FROM test t1
-- table for prev. transaction
JOIN test t2 ON t1.user_id = t2.user_id 
            AND t1.createdAt < t2.createdAt
            AND 7 NOT IN (t1.status_id, t2.status_id)
JOIN (SELECT t3.user_id
      FROM test t3
      WHERE t3.status_id != 7
      GROUP BY t3.user_id
      HAVING SUM(t3.createdAt < '2020-04-01') > 1
         AND SUM(t3.createdAt BETWEEN '2020-02-01' AND '2020-04-01')) t4 ON t1.user_id = t4.user_id
WHERE NOT EXISTS (SELECT NULL
                   FROM test t5
                   WHERE t1.user_id = t5.user_id
                     AND t5.status_id != 7
                     AND t1.createdAt < t5.createdAt
                     AND t5.createdAt < t2.createdAt) 
HAViNG cretecompare2  BETWEEN '2020-02-01' AND '2020-04-01'

user_id | cretecompare1 | cretecompare2 | diff ------: | :------------ | :------------ | ---: 14 | 2020-03-02 | 2020-03-03 | 1 13 | 2020-01-06 | 2020-03-04 | 58 14 | 2020-03-03 | 2020-03-10 | 7