SQL Statements

hei, can anyone help me on this.. am doin' searchin' problem... i have this statement doin' -

Select Distinct sessionno,clientid,userno from data, parcel where data.clientid = 1 or data.print_order is not null or data.remarks is not null.....

but am not sure if this really the statement to use for what i really wanted to do... am trying to combine 3 processes, like i have a combo box, radio button and a check box... then when i chose from the combo box and at the same time clicked on one radio and check box then click the search button, the results that i would get are from the process i just did...

am doin' the correct process of statement here... someone please help me on this... thanks in advance...