with word check-in did you meant INFA Metadata check-in in the Power center Repository ?
Try follwing query -
select * from opb_version_props
where comments ='<comment>'
Note - it should work on informatica 9.0.1. I am not sure about other versions. Please check in your version and let me know if it worked.
That worked perfectly!
Thanks a lot for your help!!
You are welcome.