performance issue in smart forms

Hi all,

I am making some smartform in HR and whenever user is generating the form, I am storing all the dynamic fields in a ztable and assigning this set of values a unique key in the table so that whenever a user wants to generate the same smartform in future again, he can do so by using this unique key.

Now my concern is that I am storing all the dynamic fields like personal area text and designation text etc. in that z table. Whenever i am using the unique key to generate that form, its going into that z table and fetching the values from there on the basis of unique keys. Imagining that there are 50000 records in that table, will it be better performance wise it I just store the key codes of fields like personal area text and designation text etc. and while generating the form, and fetching the values wrt. key, I get the texts from different tables using these key codes of fields like personal area text and designation text etc. or it makes no difference if i store complete personal area text and designation text etc in the ztable and while genetating form i can get all the values from that single line of ztable using the key???

Another concern which i have is that wheather an inner join is better or 3-4 'Select Single' statments are better performance wise? - In other words suppose if I want to pull out single record - different fields from different tables of one personal number, should I use select single on all those table or is join better n that case too????

Thanks

Ribhu