oracle & c# - How can I implement this kindly help me to do..

Question

How can I implement this kindly help me to complete.

 Table1: empid (primary key),  empdoj, empamt, empadd

Table2: emploanid(primary key),  empph, empdob

Table3: empsal,emploan,empint

 I have to use empdoj, empamt, emploanid in table3 and I have to search, update the details by using emploanid

 Frond end : c#

Database : oracle

Thanks in advance.