What is row number in sql server? How can we use it?

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Hello everyone, today I am going to discuss the Row number in SQL server.

What is Row_Number()?

Row_Number is used to generate the number of each row dynamically in a sequential order based on some column orders.

So, We can use Row_Number() with order by clause, without order by we can not use the Row_Nuber function.

Row_Number() over(order by EmpName) as RowNumber

Example:

Generate unique Id for each row dynamically: – In case, if the table does not have a primary key or any unique identification number, you can use Row_Number to provide the unique ID for a table.

select 
Row_Number() over(Order by EmailId) as Id,
EmailId,FirstName,LastName 
from 
Employee

An output from the above SQL Query
Row_Number_UniqueId

 

 

 

 

 

 

You can also watch video 

 

Do you think this article was able to clear your doubts on row number in sql? Feel free to provide your comments and concerns in the below comment section.
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