sql运算符优先级及逻辑处理顺序--查询sql执行顺序

sql逻辑处理顺序



--开启和关闭查询

set statistics profile on
set statistics io on
set statistics time on
go
select * from hk_orders a left join hk_orders_sub b on a.order_no=b.order_no

set statistics profile off
set statistics io off
set statistics time off