Update column based on two columns

Question

Hi,
MinValue     MaxValue    Desc
-1                -1    
-1                 1    
-1                 2    
0                  0    
0                  1    
0                  2 
The above is my table which is having three columns MinValue, MaxValue, Desc. First two columns have data and I need to update the 3rd column 'Desc' based on two columns data.
I need to update like,
when MinValue=-1 and MaxValue=-1 then 'NotSpecified'
when MinValue=-1 and MaxValue=1 then 'Up to 1'
when MinValue=-1 and MaxValue=2 then 'Upto 2'
when MinValue=0 and MaxValue=1 then 'At lest 1'
when MinValue=0 and MaxValue=2 then 'At least 2'
when MinValue=0 and MaxValue=3 then 'At least 3'
The data in 'MaxValue' is like 1,2,3,4,5...50. So for each description it should append this value as mentioned above(till 'Up to 50', 'At least 50'). How can I do this with case statement?
Thanks,
Gangadhar

Answer 1

declare @T table ( MinValue int,MaxValue int, [Desc] nvarchar(100) );
insert @T ( MinValue, MaxValue )
values ( -1, 1 ) , ( -1, 1 ) , ( -1, 2), ( 0, 0), ( 0, 1), ( 0, 2)
select *
from @T
update @T
set [Desc] = case
when MinValue=-1 and MaxValue=-1 then 'NotSpecified'
when MinValue=-1 and MaxValue=1 then 'Up to 1'
when MinValue=-1 and MaxValue=2 then 'Upto 2'
when MinValue=0 and MaxValue=1 then 'At lest 1'
when MinValue=0 and MaxValue=2 then 'At least 2'
when MinValue=0 and MaxValue=3 then 'At least 3'
end
select *
from @T
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