Put a "(" and ")" on string of sqlquery - sql

Question

string sqlquery=
Select userPropID , PropType, PropLoc, PropTranType,PropFloorNo From dbo.tbl_allProperties
WHERE PostPropFor = 'Sale' AND PropCity = '4320-1001041'
AND PropType ='Business Centre' OR PropType ='Space in Shopping Mall' OR PropType ='Commercial Showroom' AND PropImage !='~/user_prop_images/noImage.jpg'
Above sqlquery does not have fix field, it may expand with more fields as user enters value into fields/controls.
My requirement is :
if there is a single 'PropType', do nothing.
if more than one 'PropType', put a '(' before first 'PropType' and
a ')' after the value of last 'PropType'.
Above query should be like this:
Select userPropID , PropType, PropLoc, PropTranType,PropFloorNo From dbo.tbl_allProperties
WHERE PostPropFor = 'Sale' AND PropCity = '4320-1001041'
AND (PropType ='Business Centre' OR PropType ='Space in Shopping Mall' OR PropType ='Commercial Showroom') AND PropImage !='~/user_prop_images/noImage.jpg'

Answer 1

Your description modifies the values on separate rows. If so, you can use row_number() and a case statement:
Select userPropID,
(case when row_number() over (partition by userPropId order by PropTYpe) = 1 then '(' + PropType
when row_number() over (partition by userPropId order by PropTYpe desc) = 1 then PropType + ')'
else PropType
end) as PropType
PropLoc, PropTranType, PropFloorNo
From dbo.tbl_allProperties
where PostPropFor = 'Sale' AND PropCity = '4320-1001041' AND
PropType in ('Business Centre', 'Space in Shopping Mall', 'Commercial Showroom') AND
PropImage !='~/user_prop_images/noImage.jpg';