I had search on many sites but got difference answers as Select Single is faster than upto 4 rows or
upto one rows is fatser than select single...
one of the answer i have got is like
If you Google, you will see lots of results that will say SELECT SINGLE is faster and efficient than SELECT UPTO 1 ROWS.
But that is 100% incorrect.
SELECT UPTO 1 ROWS is faster than SELECT SINGLE.
If for a WHERE condition, only one record is present in DB, then both are more or less same.
However, If for a WHERE condition multiple records are present in DB, SELECT UPTO 1 ROWS will perform better than SELECT SINGLE.
and on this link opposite is Given to this
http://wiki.sdn.sap.com/wiki/display/HOME/Difference+between+select+single+and+select+upto.
(mention line: he System test result showed that the variant Single * takes less time than Up to 1 rows)
Can any one please tell with simple and presise language...
Thanks...