统计在线时长

小伙伴们有没有觉得学习数据库很有意思？有意思就对了！今天就给大家带来《统计在线时长》，以下内容将会涉及到MySQL，若是在学习中对其中部分知识点有疑问，或许看了本文就能帮到你！

------表结构------
CREATE TABLE

usr_online_log

id

usr_id

is_online

creat_time

id

-----sql语句--------
SELECT
usr_id,
DATE_FORMAT(DATE_ADD(
'1900-01-01 00:00:00',
interval sum(interrval_time) second
),'%T') AS total_interval,
creat_time date
FROM
(
SELECT
t1.usr_id,
LEFT (t1.creat_time, 10) AS creat_time,
TIMESTAMPDIFF(SECOND,t1.creat_time,t2.creat_time) AS interrval_time
FROM
usr_online_log t1
INNER JOIN usr_online_log t2 ON t1.usr_id = t2.usr_id
AND t1.is_online = 1
AND t2.is_online = 0
AND t1.creat_time AND t2.id = (
SELECT min(id) FROM usr_online_log
WHERE usr_id = t1.usr_id
AND is_online = 0
AND id > t1.id
)
) a
GROUP BY
usr_id,
creat_time

今天关于《统计在线时长》的内容介绍就到此结束，如果有什么疑问或者建议，可以在golang学习网公众号下多多回复交流；文中若有不正之处，也希望回复留言以告知！