How to get sum of count based on distinct values

Question

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SQL-Server-2008R2

SQL

select distinct(UserName), case when (column1 <> column2
        OR (column1 IS NULL AND column2 IS NOT NULL)
        OR (column1 IS NOT NULL AND column2 IS NULL)) then
     Count(column3)  else '0' end as Count
 from table1 where column4='test'  Group BY column1 , column2, UserName

UserName Count
john 0
mary 0
mary 1
mary 20
sean 0
sam 0

i am getting results like above but i need sum of count based on unique of username
for ex: Mary is repeated 3 time in the table but i need the result as mary:21 in sql query.
Please help me on this

thanks in advance

Posted 19-Nov-14 19:00pm

SukirtiShetty

Updated 19-Nov-14 20:18pm

Rajesh waran

v2

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3 solutions

Solution 1

I'm not sure, but based on my Observation, i think you want show data for each users.
Try like this,

SQL

select UserName,sum(Count) as Count from table1 group by UserName

Posted 19-Nov-14 19:51pm

Rajesh waran

Updated 19-Nov-14 19:52pm

v2

Comments

SukirtiShetty 20-Nov-14 2:09am

No i have tried but same results. i want results of count as 0 for other usernames but for mary i want 21 as count. Please help me on this

Rajesh waran 20-Nov-14 2:17am

can u provide your full table stucture and sample data's? and pls provide your expecting output.

SukirtiShetty 20-Nov-14 3:28am

Column1 Column2 Column3 Column4 Column5
test sample001 Mary NULL NULL
test sample002 Mary NULL NULL
test sample003 Mary NULL NULL
test sample004 Mary NULL NULL
test sample005 Mary A NULL
test sample006 Mary A A
test sample007 Mary NULL NULL
test sample008 John NULL NULL
test sample009 John NULL NULL
test sample010 John NULL NULL
test sample011 John NULL NULL
test sample012 John NULL NULL
test sample013 John NULL NULL
test sample014 John NULL NULL
test sample015 John NULL NULL
test sample016 Sam A NULL
test sample017 Sam NULL NULL
test sample018 Sam NULL NULL
test sample019 Sam NULL NULL
test sample020 Sam A NULL
test sample021 Sam NULL NULL
test sample022 Sam NULL NULL
test sample023 Sam NULL NULL
test sample024 Sam A NULL

Output will be:
UserName Count
Mary 1
John 0
Sam 3

Tomas Takac 20-Nov-14 3:43am

You should update your question with this information. Use the "Improve question" button. BTW it seems the order of your columns is different in your sample data and your query.

Shweta N Mishra 20-Nov-14 3:42am

on what basis you want only one count of Mary , i see its 7 and even a filter is applied on column3 then also its 2.

SukirtiShetty 20-Nov-14 3:52am

i need it as a distinct value of mary which gives me 3 times in the output.
below is the output what i get while executing below query.

select distinct(UserName), case when (column4 <> column5
OR (column4 IS NULL AND column5 IS NOT NULL)
OR (column4 IS NOT NULL AND column5 IS NULL)) then
Count(column2) else '0' end as Count
from table1 where column1='test' Group BY column1 , column2, column3

UserName Count
John 0
Sam 3
Mary 1
Mary 0
Mary 0

SukirtiShetty 20-Nov-14 3:54am

and condition is if(column4==Column5) then Count is 0 (if it is NULL value)
else if(Column4!=column5) the Count=1

Solution 3

i think this should also work,check it.

SQL

select 
     Column3 as UserName,Count(1) as Count 
from 
    table1 
Where 
      isnull(column4,'')<>isnull(column5,'')
group by Column3

Posted 19-Nov-14 22:26pm

Shweta N Mishra

Updated 19-Nov-14 22:27pm

v2

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Tomas Takac · Accepted Answer · 2014-11-19T22:06:00

You are on good way with the flag which says if column4 and column5 are different for the given row. Then you just need to sum those flags by user name.

SQL

select 
  column3 as UserName, 
  Sum(case 
    when (column4 <> column5
      OR (column4 IS NULL AND column5 IS NOT NULL)
      OR (column4 IS NOT NULL AND column5 IS NULL)) then 1 
    else 0 
  end) as Count
from table1 where column1='test' 
group by column3