i want to run a query on multiple processors. what is the syntax to run a parallel query? please provide a sample query
我想在多个处理器上运行一个查询。运行并行查询的语法是什么?请提供一个查询示例
1 个解决方案
#1
4
You don't: the optimizer decides based on the "cost" of the query (and some other factors)
不需要:优化器根据查询的“成本”(以及其他一些因素)来决定
See BOL: Parallel Query Processing
参见BOL:并行查询处理
Now, you can limit parallelism with MAXDOP or change the cost threshold, but it's not something I'd do.
现在，你可以用MAXDOP限制并行度或者改变成本门槛，但这不是我要做的。
Why do you want to explicitly set this?
为什么要显式设置这个?
#1
4
You don't: the optimizer decides based on the "cost" of the query (and some other factors)
不需要:优化器根据查询的“成本”(以及其他一些因素)来决定
See BOL: Parallel Query Processing
参见BOL:并行查询处理
Now, you can limit parallelism with MAXDOP or change the cost threshold, but it's not something I'd do.
现在，你可以用MAXDOP限制并行度或者改变成本门槛，但这不是我要做的。
Why do you want to explicitly set this?
为什么要显式设置这个?