If your data files are stored in blob storage at a Uri like:
https://<account>.blob.core.windows.net/<container>/folderName/2014/01/01
then your wasb: uri needs to be:
wasb://<container>@<account>.blob.core.windows.net/folderName/2014/01/01
or if this is the default storage account/container for your cluster you can just use:
wasb:///folderName/2014/01/01
The extra containerName
in your ALTER TABLE wasb: above might be throwing things off by pointing to paths that are effectively empty.