How i get ROWID and ROWNUM in sql server ?

Question

Kapil Singh Kumawat · Answer

Row_Number is one of these functions available in SQL Server that allows us to assign rankings or numbering to the rows of the result set data. Different values are assigned to different rows, based on the type of ranking function used. They are basically of the following types: Row_Number. ROWID is the physical location of a row. Consequently it is the fastest way of locating a row, faster even than a primary key lookup. So it can be useful in certain types of transaction where we select some rows, store their ROWIDs and then later on use the ROWIDs in where clauses for DML against those same rows

Ravi Kiran Chanduri · Answer

Hello Sanwar Ranwa, Row_Number in SQL server is used to set the numbers for selected results. For example : Let's assume we have a table called EMP with Name and Age as columns we need the result with sequence numbers of the rows to do some operation with the result. In this situation, we use ROW_NUMVER() to assign the sequence numbers to the result. create table #EMP ( Name varchar (100), Age INT ) Insert into #EMP VAlues ( 'XXXXX' ,24) Insert into #EMP VAlues ( 'YYYYY' ,24) Insert into #EMP VAlues ( 'ZZZZZ' ,24) Insert into #EMP VAlues ( 'WWWWW' ,24) SELECT ROW_NUMBER() OVER( ORDER BY name ASC ) AS Row#, name , Age FROM #EMP Here, we get the result as below ROWID , I searched for ROWID in SQL. I didn't find anything with this keyword in SQL. Guys, correct me if I am wrong. I saw that ROWID is the key work in Oracle where we get the actual/ physical location of a particular row in the DB(to technically say, the address of the row).

Packiaraj Santhiyagu · Answer

Hi, Please elabrate you question.

Sanwar Ranwa · Answer

how i use rownum and rowid like these query Select * from Employee where Rownum =1; Select * from Employee where Rowid= select max(Rowid) from Employee

Shashangka Shekhar · Answer

Details: http://www.complexsql.com/rowid-rownum/ Query: SELECT a.%%physloc%% AS rowid, ROW_NUMBER() OVER (ORDER BY id) AS rownum FROM [dbo].[User] a

How i get ROWID and ROWNUM in sql server ?

Answers (5)