Data Access Time

Does anyone know if it is possible to check whcih block of data does a given query accessed to get the result ? What I am trying to do is to count how many block of data has to be accessed for a given query to obtain the result. The purpose of doing so is to compare the time required for 2 queries to obtain the result. Do you know if there is any other alternative way that allow me to so ? Wei Kian Chen Received on Thu Apr 02 1998 - 00:00:00 CST