I would not really recommend synchronising a sqlite database over dropbox. You are likely to have better results creating a tree for files for dropbox to sync as one large file is likely to end up with conflicted versions.
However, answering your question in the general sense you would need to do something like this:
put url ("binfile:"&myPath) into myData
mergDropboxWriteFile relativePath,myData
Then to get the data you:
put merDropboxGetFile(relativePath) into myData