SQL Query: Banned Account Problem

QUESTION: Table: LogInfo

+-------------+----------+
| Column Name | Type     |
+-------------+----------+
| account_id  | int      |
| ip_address  | int      |
| login       | datetime |
| logout      | datetime |
+-------------+----------+
There is no primary key for this table, and it may contain duplicates.
The table contains information about the login and logout dates of Leetflex accounts. It also contains the IP address from which the account logged in and out.
It is guaranteed that the logout time is after the login time.


Write an SQL query to find the account_id of the accounts that should be banned from Leetflex. An account should be banned if it was logged in at some moment from two different IP addresses.

Return the result table in any order.

The query result format is in the following example:



LogInfo table:
+------------+------------+---------------------+---------------------+
| account_id | ip_address | login               | logout              |
+------------+------------+---------------------+---------------------+
| 1          | 1          | 2021-02-01 09:00:00 | 2021-02-01 09:30:00 |
| 1          | 2          | 2021-02-01 08:00:00 | 2021-02-01 11:30:00 |
| 2          | 6          | 2021-02-01 20:30:00 | 2021-02-01 22:00:00 |
| 2          | 7          | 2021-02-02 20:30:00 | 2021-02-02 22:00:00 |
| 3          | 9          | 2021-02-01 16:00:00 | 2021-02-01 16:59:59 |
| 3          | 13         | 2021-02-01 17:00:00 | 2021-02-01 17:59:59 |
| 4          | 10         | 2021-02-01 16:00:00 | 2021-02-01 17:00:00 |
| 4          | 11         | 2021-02-01 17:00:00 | 2021-02-01 17:59:59 |
+------------+------------+---------------------+---------------------+

Result table:
+------------+
| account_id |
+------------+
| 1          |
| 4          |
+------------+
Account ID 1 --> The account was active from "2021-02-01 09:00:00" to "2021-02-01 09:30:00" with two different IP addresses (1 and 2). It should be banned.
Account ID 2 --> The account was active from two different addresses (6, 7) but in two different times.
Account ID 3 --> The account was active from two different addresses (9, 13) on the same day but they do not intersect at any moment.
Account ID 4 --> The account was active from "2021-02-01 17:00:00" to "2021-02-01 17:00:00" with two different IP addresses (10 and 11). It should be banned.

SOLUTION:

step1) create a self join with condition 
l.account_id = l2.account_id and l1.ip_address <> l2.ip_address
Step2)  Filter the data on the basis of 
l2.login <= l1.logout and l2.login >=l1.login

select l1.account_id from LogInfo l1
inner join LogInfo l2
on l1.account_id = l2.account_id 
and l1.ip_address <> l2.ip_address
where 
l2.login <= l1.logout and l2.login >=l1.login

Post Reference: Vikram Aristocratic Elfin Share