How to group by week no and get start date and end date for the week number in Sqlite

I want to group the result by week no and get the start date and end date for the week no. I searched in forums and Google but not able to find the right solution. Please help me on this issue.

Thank u.

 

Could somebody give me an example query.

 

Hi,

Can you let me know the different fields you have in your tables ?

 

Groupby can be used on single field as well as multiple fields hence I need to know the different fields you have in your tables.