Peek function not working

[Anonymous]

Hi , I'm working on missing data generation for Exchange rate so I just have to take data with respect INR to USD conversion. But peek is not working properly. So dates are generated but exchange rate is not mapped for the same. Please have a look and revert ASAP.

Thanks in advance .

[tresesco]

Try like:

If(Len(Trim(Rate))=0,Peek(Rate),Rate) as Actual_Rate

or,

If(Len(Trim(Rate))=0,Peek(Actual_Rate),Rate) as Actual_Rate