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[英]get rows with fixed difference of values between rows and decreasing consecutive date
[英]calculate date difference between consecutive rows in mysql
我在 mysql 中有一个包含列的表:
id, created_time, name
每行都有 id 和创建时的日期时间。 例如下面:
id created_on name
1 2020-12-03 13:15:09 john
2 2020-11-08 14:11:19 john
3 2020-10-06 14:11:19 john
4 2020-09-12 14:11:19 john
想要显示 2 行之间的差异大于 30 天的结果
预计 Output:-
id created_on name
2 2020-11-08 14:11:19 john
4 2020-09-12 14:11:19 john
我尝试使用以下查询但失败了,因为它显示了所有数据。
SELECT id
, name
FROM
( SELECT MIN(created_on) start_time
, id
, name
FROM table1
WHERE name = 'john'
GROUP
BY id
) start_action
JOIN
( SELECT MAX(created_on) close_time
, id
, name
FROM table1
WHERE name = 'john'
GROUP
BY id
) close_action
USING (id,name)
WHERE name = 'john'
我正在使用 Mysql 5.6 版本请求帮助
您可以在此处使用LEAD
获得 MySQL 8+ 解决方案:
WITH cte AS (
SELECT *, LEAD(created_time) OVER (ORDER BY id) lead_created_time,
LAG(created_time) OVER (ORDER BY id) lag_created_time
FROM yourTable
)
SELECT id, created_time
FROM cte
WHERE ABS(DATEDIFF(lead_created_time, created_time)) > 30 OR
ABS(DATEDIFF(lag_created_time, created_time)) > 30;
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