sql server 2008 r2 - Only display a character if the ISNULL has a valid entry -


in sql server, i'm looking @ doing concatenating 2 fields together. so, example, have layout:

col1         col2 building   room 101 building b   room 2a building c   room 301 building d building e   room 200

and want concatenate them like:

building a-room 101 building b-room 2a building c-room 301

what happening when comes building d get:

building d-

which awful. thought isnull([col1] + '-', '') display - character. there way add - value if [col2] has value without using case statement? or going in wrong approach?

i think test needs evaluate col2, not col1. try this

select [col1] + isnull('-' + [col2], '')

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