Question

SQL query question

I have a query like

select proposal_id, service_id,account_type 
from table1

The result is like this:

proposal_id  service_id  account_type
   1          1001        INTERVAL
   1          1002        INTERVAL
   2          1003        NON INTERVAL
   2          1004        NON INTERVAL
   3          1005        NON INTERVAL
   3          1006        INTERVAL

I want to write a query: for each proposal_id, if all the service have INTERVAL then get ‘INTERVAL’, if all NON-INTERVAL get ‘NON-INTERVAL’, if both, get ‘Both’

For the example above, it should return

proposal_id   account_type
   1           INTERVAL
   2           NON-INTERVAL
   3           BOTH

Answer 1

Data:

declare @table table (id int, sid int, acc nvarchar(20))
insert @table VALUES (1,1001,'INTERVAL'),(1,1002,'INTERVAL'),(2,1003,'NON INTERVAL'),(2,1004,'NON INTERVAL'),
(3,1005,'NON INTERVAL'),(3,1006,'INTERVAL')

Query:

select x.Id
    ,   CASE counter
            WHEN 1 THEN x.Account_Type
            ELSE 'BOTH'
        END AS Account_Type
from (
    select  Id, Count(DISTINCT(acc)) AS counter, MAX(acc) As Account_Type
    from @table
    GROUP BY Id
) x

Results

Id          Account_Type
----------- --------------------
1           INTERVAL
2           NON INTERVAL
3           BOTH