Sql server 指示在所有CPU上花费的时间与已用时间之比，已用时间表示查询开始和结束之间花费的总墙时间。 SET STATISTICS IO ON; SET STATISTICS TIME ON; SELECT [CollegeName] ,[Candid

指示在所有CPU上花费的时间与已用时间之比，已用时间表示查询开始和结束之间花费的总墙时间。

SET STATISTICS IO ON;
SET STATISTICS TIME ON;

SELECT [CollegeName]
      ,[CandidateID]
      ,[age]
      ,[race]
      ,[sex]
      ,[ethnic]
      ,[arm]
      ,[Weeknum]
      ,[siteid]
      ,[country]
      ,[Region]
      ,[SubRegion]
      ,[SNAME]
      ,[UID]
  FROM [testdata]

Scan count 1, logical reads 1338, 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 = 31 ms,  elapsed time = 4381 ms.

CREATE VIEW vw_testdata
AS
SELECT [CollegeName]
      ,[CandidateID]
      ,[age]
      ,[race]
      ,[sex]
      ,[ethnic]
      ,[arm]
      ,[Weeknum]
      ,[siteid]
      ,[country]
      ,[Region]
      ,[SubRegion]
      ,[SNAME]
      ,[UID]
  FROM [testdata]

Scan count 1, logical reads 1324, 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 = 15 ms,  elapsed time = 5853 ms.

CREATE FUNCTION [dbo].[fn_DocApproval] (@collegename nvarchar(30) = NULL)
RETURNS TABLE 
AS
RETURN  
(
SELECT [CollegeName]
      ,[CandidateID]
      ,[age]
      ,[race]
      ,[sex]
      ,[ethnic]
      ,[arm]
      ,[Weeknum]
      ,[siteid]
      ,[country]
      ,[Region]
      ,[SubRegion]
      ,[SNAME]
      ,[UID]
  FROM [testdata] WHERE CollegeName = ISNULL(@collegename, collagename)
)

Scan count 1, logical reads 1338, 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 = 203 ms,  elapsed time = 785 ms.