You can set SQL Server to display information regarding the 
amount of disk activity generated by T-SQL statements. This 
option displays the number of scans, the number of logical 
reads (pages accessed), and the number of physical reads 
(disk accesses) for each table referenced in the statement. 
This option also displays the number of pages written for 
each statement. When STATISTICS IO is ON, statistical 
information is displayed. When OFF, the information is not 
displayed. After this option is set ON, all subsequent T-
SQL statements return the statistical information until the 
option is set to OFF. 
Here is the syntax: 

SET STATISTICS IO {ON | OFF}