问下，这个SQL语句应该如何优化_Sql Server

问下，这个SQL语句应该怎么优化
select * from
(
select * from tb1
)
left join
(
select * from tb2
)
where .....

------解决方案--------------------

SQL code

select * from tbl a left join tb2 b on a.col=b.colwhere ......
------解决方案--------------------
select * from tb1
   left join   tb2 on ....
where .....
------解决方案--------------------
select *  
from tb1 
left join tb2 on ...
where ...