Search for the number in a cell then copy a cell from that row to another cell

Question

I need to put the downstream number eg.6.25 (cell L2) into Cell L1. But this has to be found from the database. So if Cell B1 matches anywhere in column B copy the L value from that row and copy to the L column in the original row ie L1. I think that VLookup is what I am trying to do but can't make it work...

PIPE    17888   Upstream   Pit ID   20447   Concrete    Circular Pipe   1/04/2015   380                     6.36    img008.jpg  
PIPE    17888   Downstream Pit ID   22105   Concrete    Circular Pipe   1/04/2015   380         Downstream  6.25    img010.jpg  
PIPE    17854   Downstream Pit ID   22105   Concrete    Circular Pipe   1/04/2015   380         Downstream  6.36    img010.jpg  US PIPE NOT FOUND
PIPE    17811   Upstream   Pit ID   22105   Concrete    Circular Pipe   1/04/2015   380                     6.25    img010.jpg  
PIPE    18105   Downstream Pit ID   23037   Concrete    Circular Pipe   1/04/2015   600         Downstream  5.94    img014.jpg  

Answer 1

IF you can be sure that "Downstream" appears once only for each ID in the B column, you could use SUMIFS, which allows multiple criteria, to find the right values to add into the appropriate cells.

=SUMIFS($L$2:$L$1000,$B$2:$B$1000,B2,$C$2:$C$1000,"Downstream")

Note the specific ID is a non-fixed cell reference - here, B2.

This wouldn't explicitly flag any problems, though; it would just evaluate to zero if no corresponding record was found and would sum the results if two or more matching records were found.