Changing A Value Using If Statement in SQL Query

Question

Hello, I have a very rudimentary question that I'm stuck on.  I have a query that returns one of 3 different integers.  I want to have each integer translate to a string value depending on the number returned.  Unfortunately this is the SCCM
database which cannot be changed to provide an additional table with the values.
I have something like this but I'm not getting what I want out of the date - depending on what I do I either get an error, or nothing.
Declare @NewValue nvarchar
Declare @Value nvarchar
If @Value = 1 Set @Value = 'String1'
If @Value = 2 Set @Value = 'String2'
If @Value = 3 Set @Value = 'String3'
Select PrimaryKey,IntegerValue FROM db_Table WHERE @Value=IntegerValue
I know this is a simple thing but I'm new to SQL and not exactly sure what terms I should even be using to search for this.  Thanks for the help!

Answer 1

select PrimaryKey, IntegerValue, case IntegerValue when 1 then 'String1'
when 2 then 'String 2' when 3 then 'String3' else 'Unknown Integer Value' end as [Description]
from db_Table
Take a look at
CASE expression in BOL. You may also find the following article helpful
http://social.technet.microsoft.com/wiki/contents/articles/21327.t-sql-simplified-case-expression.aspx
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