多次返回SQL查询性能统计信息消息

我在SQLServerManagementStudio上运行这个查询1，看到它像3条消息一样返回我，但当存储过程中有近10-20条来自统计数据的消息时，返回的消息是相同的。发生了什么，为什么我会看到他们

SET STATISTICS IO,TIME ON;
GO
    SELECT [UserId]
         ,[UserType]
         ,[CreateDT]
         ,[EffectiveDT]
       FROM [dbo].[People] ORDER BY [UserId]
SET STATISTICS IO,TIME OFF;
GO

我收到的信息如下

SQL Server parse and compile time: 
   CPU time = 0 ms, elapsed time = 0 ms.
SQL Server parse and compile time: 
   CPU time = 0 ms, elapsed time = 0 ms.

 SQL Server Execution Times:
   CPU time = 0 ms,  elapsed time = 0 ms.

 SQL Server Execution Times:
   CPU time = 0 ms,  elapsed time = 0 ms.

 SQL Server Execution Times:
   CPU time = 0 ms,  elapsed time = 0 ms.
Table 'People'. Scan count 1, logical reads 155, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.

 SQL Server Execution Times:
   CPU time = 0 ms,  elapsed time = 143 ms.

 SQL Server Execution Times:
   CPU time = 0 ms,  elapsed time = 0 ms.

 SQL Server Execution Times:
   CPU time = 0 ms,  elapsed time = 0 ms.

 SQL Server Execution Times:
   CPU time = 0 ms,  elapsed time = 0 ms.

 SQL Server Execution Times:
   CPU time = 0 ms,  elapsed time = 0 ms.

 SQL Server Execution Times:
   CPU time = 0 ms,  elapsed time = 0 ms.

 SQL Server Execution Times:
   CPU time = 0 ms,  elapsed time = 0 ms.

 SQL Server Execution Times:
   CPU time = 0 ms,  elapsed time = 143 ms.

查询所用的总时间是143ms+143ms吗？

见下文

set statistics time on
select * from test
set statistics time off

输出：

SQL Server Execution Times:
   CPU time = 0 ms,  elapsed time = 264 ms..

SQL Server Execution Times:
   CPU time = 0 ms,  elapsed time = 1 ms.

SQL Server Execution Times:
   CPU time = 0 ms,  elapsed time = 1 ms.

(59 row(s) affected)

(1 row(s) affected)

SQL Server Execution Times:
   CPU time = 0 ms,  elapsed time = 264 ms.

现在添加print语句和一些变量

set statistics time on

print' statistics time '
declare @a int
set @a =1

select * from test
set statistics time off

输出：

SQL Server Execution Times:
   CPU time = 0 ms,  elapsed time = 264 ms..

SQL Server Execution Times:
   CPU time = 0 ms,  elapsed time = 1 ms.

SQL Server Execution Times:
   CPU time = 0 ms,  elapsed time = 1 ms.

(59 row(s) affected)

(1 row(s) affected)

SQL Server Execution Times:
   CPU time = 0 ms,  elapsed time = 264 ms.

在上面的代码中，总执行时间是1+1+264

---

希望这对它的工作原理有所帮助

这是否意味着在您的案例中执行查询所花费的总时间是

1+1+264

？