Hi Team - I have my data available in database as well as in All request report

Some useful links to read more about Appian capabilities to retrieve information from your RDBMS

www.appian.com/.../

forum.appian.com/.../Data_Stores.html
forum.appian.com/.../Defining_a_Custom_Data_Type.html
forum.appian.com/.../Database_Schema_Best_Practices.html

forum.appian.com/.../Records.html
forum.appian.com/.../Records_Tutorial.html

forum.appian.com/.../Rules.html
forum.appian.com/.../Write_to_Data_Store_Entity_Smart_Service.html
forum.appian.com/.../Write_to_Multiple_Data_Store_Entities_Smart_Service.html

If you are not very familiar with all the capabilities of the product I suggest you review the available Appian Training programs and or the documentation including the links from above.