Did you get anywhere with this Tony?
Hi Chris,
I never did get a query built for this. I started working on one and was able to build something that found all of the courses without a specific block, but I didn't get as far as adding a new block to them. I just ditched the idea and waited for a new semester to start, then added the block as a "default" block in moodle's config file. That way when new courses were created for the semester they would have it added automatically.
Despite that, this would still be a very useful query/script to have in the future.
If it's any help, I did an SQL query that pulls in all courses, and then if the blocks.id and blocks.blockname are null then that course needs to have the block added (the left join takes care of that)
SELECT DISTINCT course.id, course.shortname, course.fullname, blocks.id , blocks.blockname, blocks.parentcontextid FROM database_name_here.mdl_course as course inner join moodle_2015.mdl_context as context on context.instanceid = course.id left join moodle_2015.mdl_block_instances as blocks on blocks.blockname = "choose_name_of_block" AND context.id = blocks.parentcontextid ;
Note this is pure SQL, if using Moodle to query it will be slightly different
Just update the database name and the name of the block to get the results