DATETIME SELECT SELECT INTO DATE PAD STRING DYNAMIC SQL CURSOR MONEY FORMAT PERCENT STORED PROCEDURE SQL SERVER AGENT JOB OPTIMIZATION WHILE LOOP OVER PARTITION BY UPDATE
 
 
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How to use TABLESAMPLE for statistical sampling?

Execute the following Microsoft SQL Server Transact-SQL demonstration scripts in Management Studio Query Editor.

USE AdventureWorks;

 

 

SELECT TotalSickHours=sum(SickLeaveHours),

       AverageSickHours=avg(SickLeaveHours)

FROM HumanResources.Employee

     TABLESAMPLE SYSTEM (3 * 5 PERCENT);

    

/*  TotalSickHours      AverageSickHours

            1797              47  */


Related article:

Limiting Result Sets by Using TABLESAMPLE

 

Exam Prep 70-461
SQL 2016 DESIGN & PROGRAMMING
 
 
 
DATETIME SELECT SELECT INTO DATE PAD STRING DYNAMIC SQL CURSOR MONEY FORMAT PERCENT STORED PROCEDURE SQL SERVER AGENT JOB OPTIMIZATION WHILE LOOP OVER PARTITION BY UPDATE