Database Reference
In-Depth Information
Figure 19-10.
Clustered index seek details with a local variable
The disparity you're looking for is the
Actual Number of Rows
value (near the top) compared to the
Estimated
Number of Rows
value (at the bottom). In the properties shown in Figure
19-10
, there are 1,203.6 estimated rows,
while the actual number is considerably higher at 4,012. If you compare this to the same operator in the second query
(the one without the local variable), you may notice something else. Take a look at Figure
19-11
.
Figure 19-11.
Clustered index seek details without a local variable
