Question

In the below i have a table1,table2 ,i am stuck with a query.I want find the timestamps in table2 which are in between two consecutive timestamps of table1 .How to form this query.

table1:

   id    timestamp
    1    2012-08-15 01:11:11
    1    2012-08-15 01:11:14
    1    2012-08-15 01:11:16 
    2    2012-08-15 01:22:11
    2    2012-08-15 01:32:11
    2    2012-08-15 01:33:11
    2    2012-08-15 01:36:11

table 2:

   id    timestamp
    1    2012-08-15 01:11:12
    1    2012-08-15 01:11:15
    1    2012-08-15 01:11:16 
    2    2012-08-15 01:23:55
    2    2012-08-15 01:26:11
    2    2012-08-15 01:34:11
    2    2012-08-15 01:36:01

Desired output:Get all rows of table2 which are in between the timestamps of table1 and if possible output timestamp of table1 also

Answer 1

Join table1 to itself and then group to find consecutive timestamps, then join the result to table2 as desired:

SELECT *
FROM   table2 JOIN (
  SELECT   a.timestamp start, MIN(b.timestamp) finish
  FROM     table1 a JOIN table1 b ON a.timestamp < b.timestamp
  GROUP BY a.timestamp
) t ON table2.timestamp BETWEEN t.start AND t.finish

See it on sqlfiddle.