Get N random records from a table in SQL Server

How to get N rows from a table in Sql Server database? it is difficult to get random Ids of the tables by using any logic, we will need to loop to create N ids but the technique we will explore here will not need any looping or any Id creation in temporary table but the very simple ways to achieve our goal

So let's take the very first one

We have function in Sql Server "NEWID()", do you know what it return, let's check it

Select top 10 NEWID() from products

I used to get the 10 rows otherwise we will need to loop, here is the output:


If we can order our records by using this new id will solve our problem, so why we are waiting, let's try to get 10 products Ids by using this logic

Select top (10)  [ProductId] 
From [Products] 
order by NewId()


So if we can use the above query as sub-query our goal is achieved

Select * 
From Products
Where ProductId IN
(Select top (@Rows)  [ProductId] from [Products] 
        where CategoryId = @CategoryId
        order by NewId())

Every time it will give 10 random product list, if you can notice we user where clause to get the records of a particular category only.

Enjoy it

Ali Adravi Having 13+ years of experience in Microsoft Technologies (C#, ASP.Net, MVC and SQL Server). Worked with Metaoption LLC, for more than 9 years and still with the same company. Always ready to learn new technologies and tricks.
  • sql server
By Ali Adravi On 03 May, 14  Viewed: 910

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