How to change query from SQL Server 2012 to SQL Server 2008 R2 -

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select      @principal= iif(optionfieldvalue='', null, cast(optionfieldvalue decimal(38, 18)))      @data       templatefieldid = 47

this query written in sql server 2012. want change sql server 2008 r2.

can 1 convert code

just rid of iif new in sql server 2012:

select      @principal = case                     when optionfieldvalue = ''                        cast(null decimal(38,18))                       else cast(optionfieldvalue decimal(38, 18))                  end      @data       templatefieldid = 47

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