How to remove duplicates from table using SQL query

Question

I have a table which is as follows:

emp_name   emp_address  sex  matial_status  
uuuu       eee          m    s
iiii       iii          f    s
uuuu       eee         


        

Answer 1

This is not a query but a delete statement. It will delete/remove duplicate rows from your table

;with C as
(
  select row_number() over(partition by DUPLICATE_VAARS_DECISION 
                           order by NODE_EQ_NO) as rn
  from yourtable
)
delete C
where rn > 1

If you are only interested in querying the table and get the non duplicates as a result you should use this instead.

;with C as
(
  select *,
         row_number() over(partition by DUPLICATE_VAARS_DECISION 
                           order by NODE_EQ_NO) as rn
  from yourtable
)
select *
from C
where rn = 1