select quiery problem

[batman007]

programmingiBut ton

loggerid  ibuttonid            date              time              samplerate  
      1      337-9732000-1  2009-06-18      21:15:57        1 
      2      33-4-1832000    2009-06-18      21:16:38        1 
      3      33-124123300   2009-06-18      21:17:06        1 
      4      337-9732000-1  2009-06-18      22:45:45        1 
      5      33-4-1832000    2009-06-18      22:46:02        1

ReadingiButton

readingiButton

loggerid  ibuttonid            date              time              samplerate   temp_logger 
      1      337-9732000     2009-06-18     21:40:00        1                 27,26 
      2      33-4-1832000    2009-06-18     21:41:21        1                 28,26

Hi I want to select ibuttonid,date , time columns from both tables and order
by date, time groupby loggerid

[code green]

You have as good as written the query in pseudo code.
What is the problem?