Infotyoes...Please help me out..Need your help

Hi HR experts,

I have the following 3 different requirements.Could you please tell me the coding using LDB ,code between Get pernr and END-OF-SELECTION..

1.How to get the hourly based employees who are active on a particular day say Oct 1st 20007?

2.How to get the employees who changed from salaried to hourly and vice-versa on a particular day say Oct 1st 2007.

3.How to get employees who are on probation on a particular day say Oct 1st 2007.

Your answers are very valuable to me and will be rewarded with points.

Regards,

Vishnu.