How can I share a bigquery dataset with another project?

You cannot share a dataset with a project. You can share a dataset with a user, group, or view, and you can also make the dataset completely open.

If you want to share with users who have access to another project, the best solution is probably to create a Google group ( http://groups.google.com ), share your dataset with this group and add this group to project # 2. You can then use group membership to control access to both the dataset and another project.

After you have shared data with another project, members of that project will probably want to choose Project Menu> Switch to Project> Show Project ... and enter the ID of the other project to display these datasets in web interface navigation bars.

And since I mentioned this, if you share with the view, you will grant access to any user who can request the view, regardless of whether they can access the underlying data.