无法获得正确的查询

Question

I have a table named Datatable. and it has a column named data .

data  
-------
10       
20    
30

i need to get a column as

data  
-------
10/60   
20/60   
30/60  

i wrote the query as

select data/sum(data) 
  from datatable;

Answer 1

For SQL Server 2005+ you can do this:

SELECT CAST(data AS VARCHAR(10)) + '/' + CAST(SUM(data) OVER() AS VARCHAR(10))
FROM Datatable

Answer 2

try,

select a.data / b.total       -- will result the quotient of 10/60
from   datatable a, 
       (select SUM(data) total from datatable) b

but if you want it to be concatenated

select a.data + '/' + b.total -- will result literal string value of 10/60
from   datatable a, 
       (select SUM(data) total from datatable) b

• SQLFiddle Demo ( both queries above )

Answer 3

This works on SQL Server 2005 or later:

declare @t table (data int)
insert into @t (data) values (10),(20),(30)

select (data * 1.0)/ SUM(data) OVER () from @t

Answer 4

Using the window function sum over the entire table ( over () ):

select  1.0 * data / sum(data) over ()
from    tableName

Example at SQL Fiddle.

Answer 5

I'm not sure where the 60 value comes from, but I would do something like this:

select data + '/' + sum(data) from datatable group by data

For concatenation, please check this link: http://msdn.microsoft.com/en-us/library/aa276862(v=sql.80).aspx

Hope this helps.