In most cases, the sequence in which joins are specified
on the
Joins tab does not matter. However, it is possible that the
query optimizer for the
data source might perform the joins in a sequence that reduces performance. In these rare cases,
you can change the sequence in which joins are specified on the
Joins tab by selecting the join in
the list, and clicking
or
. This join sequence is still determined by the query
optimizer, but you can control how the SQL for the join is presented
to the query optimizer.