Question

I have a table having column name

 NAME
=========
GAURAV
GAURAV
AJAY
AJAY
=========== 

Now i want to use an existing sequence ,let say abc_seq,and i want to group the records such that ,it will give me the output group by name and each group having the same sequence number

The output which i would like to get is shown below

name    group
==============
GAURAV    1
GAURAV    1
AJAY      2
AJAY      2
==============

I have tried this with analytical function ,but how to use sequence in the query having analytical function

Answer 1

Dense_rank will do the work.

with t1 as
(
  select 'GAURAV' name from dual union all
  select 'GAURAV' name from dual union all
  select 'AJAY' name from dual union all
  select 'AJAY' name from dual
)

select name
     , dense_rank() over(order by name desc) rn
  from t1

Output:

Name    Rn 
-----------
GAURAV  1 
GAURAV  1 
AJAY    2 
AJAY    2 

Here is a DEMO