Comparison of Salaries

Hello All,

I would like to get what is the basic salary of each employee on 31.12.2010 and 01.01.2011 (increased). Please note that SAP payroll run has started from 01.01.2011, but 2010 salary record is in the system (seen when we overview from PA30).

Please help me with the way (tool) to get comparisons of information (current with previous).... thank you,,, Abdul Gafoor