Each tutorial with in the Technology Explorer is isolated in its own directory within the tutorial folder of the Technology Explorer.

For the 'Table joins' tutorial that will be build you will need to create the directory 'tableJoins' under the tutorial folder './tutorials/'.

Under the 'tableJoins' directory three other folders are required

You my have as many other directories as you need under the main path for other files that you need for the tutorial. Often this directory will just be called 'other'.