Fox wrote:
> 
> When i ask for just 100 rows from big table is the database 
> serwer produce
> whole rows or just the asked one?
> 
It depends. 
For single table selects only the first <rowno> rows are produced.
But within joins the rowno predicate only limits the last table access.
Every temporary join results includes the whole result rows. 

Additionally you should know that if a rowno predicate and an order clause 
are specified, only the first n result lines are searched and sorted. 
The result usually differs from that which would have been obtained 
if a rowno predicate had not been used and if the first n result 
rows had been considered.

HTH.

Kind regards,
Holger
SAP Labs Berlin
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