Question

Select * from MyTable 
    where myField = 1
    And myImportantField ???
    ...

i have following parameters :

@DoCalculateValues bit,  
@FromValue int,  
@ToValue int  

I NEED THIS

if @DoCalculateValues = 1 then  
check if myImportantField is between @FromValue and @ToValue  
else  
ignore values, something like "And myImportantValue = myImportantValue"

please consider that this is all happening in the middle of a “… WHERE … AND …” clause

Answer 1

Select * from MyTable 
where myField = 1
And (@DoCalculateValues = 0
or myImportantField between @FromValue and @ToValue)