Union of two queries for one table

[eluser]crimsun[/eluser]
Hi friends,

Thanks for your reply i resolved this problem by using the two separate quires and make them two separate array and merge them thanks for your help..but now i face some other problem as i use the group by clause for title so that if there are 3 same title its show only one time i need that its correct but if suppose you comment on the title so the order by date will display the latest comment first..........but its not work it still show me old one title first then other....

so please help me for this