Mysql选择差异为10分钟的所有行

Question

I have a table with timestamp and I want to retrieve all the records with 10 minutes difference between each other. I give you an example: I have in my database 4 dates:

01-12-2015 15:45:10
01-12-2015 15:55:10
01-12-2015 15:25:10
01-12-2015 15:15:10

I want to retrieve only the 2 dates that have 10 minutes difference between each other.

I don't want to get all records where the timestamp is within 10 minutes of the current timestamp. I want to select all the records having a difference of 10 minutes between them. So in my example I want to select on the dates:

01-12-2015 15:45:10
01-12-2015 15:55:10

These 2 dates should have a difference of 10 minutes between them. How I can do that?

Answer 1

You can use now() to get the current time. So:

select t.*
from t
where t >= date_sub(now(), interval 10 minute);

Answer 2

Here's the example how you compute if the two dates has 10 minutes difference in the current time 1st param let say the current time. SELECT TIMEDIFF('2015-12-11 08:20:00','2015-12-11 08:10:00')

Answer 3

I hope you have an index. Make an JOIN on index = index+1 -> Every row is connected with the previous one. Then calculate the time diff and pick only those rows with diff more then 10 minutes.

SELECT *
FROM dates AS a LEFT OUTER JOIN dates AS b 
ON a.id = b.id+1
WHERE a.timestamps-b.timestamps >= 600

Have a look at this fiddle: http://sqlfiddle.com/#!9/31b0eb/3

Answer 4

Try:

Select * from a where a.id not in
 (select b.id from a b where TIMEstampDIFF(SECOND,a.mydate,b.mydate)<=600)
and a.id not in
 (select c.id from a c where TIMEstampDIFF(SECOND,a.mydate,c.mydate)>600)

Answer 5

You can fetch data from sql query and write the logic in your php file as follows:

$select =   mysql_query("SELECT your_datetime_column_name as time,UNIX_TIMESTAMP(your_datetime_column_name) as time_string FROM your_table_name");
 $result = mysql_fetch_array($select);
    $final_result= NULL;
    $j=0;
    foreach($result as $ff)
    {
       foreach($result as $ff11)
    {
       if(abs($ff11['time_string'] - $ff['time_string']) ==600 ){ 
       $final_result[$j]['time1']=$ff['time'];
           $final_result[$j]['time2']=$ff11['time'];
       $j++;
        }
    }
    }

and in array $final_result you will get all the dates pair with 10 min difference. hope it will help you.