SQL Server Performance Forum – Threads Archive
Reordering Joins for Performance GainsEverything else being equal….have you ever reordered the joins in a TSQL SELECT statement to optimize performance? I have a working hypothesis that the order of the joins will determine the execution plan that it uses. Still testing…haven’t reach a final conclusion yet.
Yes, many times. To make join order relevant you have to use query hint force order.
the join order in your statement should not influence the actual execution plan if the statements can be determined to be equivalent
unless you use a join hint, or other hint,
execption being when the query is so complicated that it triggers the optimizer’s governor on when to given up searching alternate plans,
but this requires many joins and many indexes