Recovery the missing hour, minute interval MySQL database

Question

This is part of my table on MySQL database

+----------+---------------------+--------+
| sID      | sDatetime           | sETX   | 
+----------+---------------------+--------+
| 16213404 | 2020-04-24 16:00:00 | 497681 |
| 16213398 | 2020-04-20 14:58:56 | 281011 | 
+----------+---------------------+--------+

This table count with 14.121.398 records

I realized that in this case more than one hour has passed between the previous and the next row

mysql> SELECT
    TIMEDIFF(
        '2020-04-20 16:00:00',
        '2020-04-20 14:58:56'
    );
+------------------------------------------------------------------+
| TIMEDIFF(
        '2020-04-20 16:00:00',
        '2020-04-20 14:58:56'
    ) |
+------------------------------------------------------------------+
| 01:01:04                                                         |
+------------------------------------------------------------------+
1 row in set

this is not possible because the data is downloaded maximum from the source every five minutes

in this case is missing the time slot between 3pm and 4pm

I have tried this query without success because the return is all zero

I think because the sID is not consecutive

The code I've tried below

SELECT A.`sID`, A.`sDatetime`, (B.`sDatetime` - A.`sDatetime`) AS timedifference
FROM tbl_2020 A INNER JOIN tbl_2020 B ON B.sID = (A.sID + 1)
ORDER BY A.sID ASC;

how can i find this anomaly in mysql table?

my version of MySQL is 5.5.62-log

the name of column is sDatetime the type is Datetime.

any suggestion, please?

thanks in advance for any help

edit #01

+----------+-----------+---------------------+
| sID      | time_diff | sDatetime           |
+----------+-----------+---------------------+
| 18389322 |       301 | 2020-05-16 23:53:29 |
| 18390472 |       308 | 2020-05-16 23:48:21 |
| 18389544 |       301 | 2020-05-16 23:43:20 |
| 18388687 |       303 | 2020-05-16 23:38:17 |
| 18388398 |       301 | 2020-05-16 23:33:16 |
| 18390451 |       308 | 2020-05-16 23:28:08 |
| 18388915 |       302 | 2020-05-16 23:23:06 |
| 18388208 |       301 | 2020-05-16 23:18:05 |
| 18390516 |       301 | 2020-05-16 23:13:04 |
| 18389904 |       301 | 2020-05-16 23:08:03 |
+----------+-----------+---------------------+

mysql> SELECT
    TIMEDIFF(
        '2020-05-16 23:53:29',
        '2020-05-16 23:48:21'
    ) AS td;
+----------+
| td       |
+----------+
| 00:05:08 |
+----------+
1 row in set

Answer 1

You should try something like this

SELECT
    sID
   ,TIME_TO_SEC(TIMEDIFF(@date,sDatetime)) time_diff
   ,@date := sDatetime
   ,sETX
FROM(
SELECT * FROM table1
ORDER BY sDatetime DESC) s1,(SELECT @date :=(SELECT MAX(sDatetime) FROM table1)) s2
HAVING time_diff > 300

First you order the table by time, then you get the time difference between two consecutive rows and check if they are bigger than 5 minutes

see example here https://www.db-fiddle.com/f/2yKt6d5RWngXVYJKPGZL6m/8

Answer 2

Comparing current row to previous works

drop table if exists t;
create table t
(sID  int, sDatetime datetime, sETX int); 
insert into t values
( 16213404 , '2020-04-24 16:00:00' , 497681),
( 16213398 , '2020-04-20 14:58:56' , 281011);

select sid,sdatetime,(select sdatetime from t t1 where t1.sid < t.sid order by t1.sid desc limit 1) prevdt,
         time_to_sec(sdatetime) - time_to_sec((select sdatetime from t t1 where t1.sid < t.sid order by t1.sid desc limit 1)) diff
from t
where  time_to_sec(sdatetime) - time_to_sec((select sdatetime from t t1 where t1.sid < t.sid order by t1.sid desc limit 1)) > 300;

+----------+---------------------+---------------------+------+
| sid      | sdatetime           | prevdt              | diff |
+----------+---------------------+---------------------+------+
| 16213404 | 2020-04-24 16:00:00 | 2020-04-20 14:58:56 | 3664 |
+----------+---------------------+---------------------+------+
1 row in set (0.002 sec)

If this is too slow add your table definition so that we can see the indexes you have.