need to confirm some conditions to record data in database

In the company where am i, there are a lot of agencies and some authorized’s users could make shopping on internal website.

I need an help in order to confirm two conditions to record needs of users in database :

  • confirm same period for each month ( for exemple, 15 august to 25 august ) ,

  • have a single record by user’s location in agency.

i don’t know how to solde this, need help plz.

PS: sorry for my bad english.

i hope i was understood…

best regards.

no one can give me some informations plz ? :s