Question

i have a table like this

userEmail | views

  A          8
  B          3
  C          4
  A          2
  B          5

i want to get rank of a particular user say B ..

what i am doing is :

SET @rank=0;
select @rank:=@rank+1 AS rank , userEmail,sum(views) as views from mtable where userEmail != 'null' Group By userEmail Order By views DESC 

this will output something like this :

rank  | userEmail | views

  1        A          10
  2        B           8
  3        C           4

I can get the rank of all users but what if i want to see rank of only one user ??

if i put where userEmail = 'B' in above query

i will get this :

rank  | userEmail | views

  1        B           8

but it should be like this :

 rank  | userEmail | views

  2          B           8

Answer 1

As Gordan pointed out my first answer is not very standard. Here is a standard way of doing the same thing.

SELECT T.userEmail, T.views, RANK() OVER (ORDER BY T.views DESC) AS viewRank
FROM (
  select userEmail,sum(views) as views 
  from mtable 
  where userEmail != 'null' 
  Group By userEmail) AS T
Order By T.views DESC

There is a special way to do this in sql server 2005+ and Oracle (using the OVER clause) but the general answer (which you have to use with mysql) is to use a where clause. Like this:

SET @rank=0;

SELECT T.rank, T.userEmail, T.views 
FROM (
  select @rank:=@rank+1 AS rank , userEmail,sum(views) as views 
  from mtable 
  where userEmail != 'null' 
  Group By userEmail Order By views DESC ) AS T
WHERE T.userEmail='[e-mail]'