Merge branch 'master' of gitlab.cs.umd.edu:keleher/424f19

project0/.cshrc

project0/01-Jupyter-Getting-Started.ipynb

project0/02-Basics-SQL.ipynb

project0/03-SQL-Different-Types-of-Joins.ipynb

project0/04-SQL-NULLs-and-UNKNOWN.ipynb

project0/05-Basic-Relational-Algebra.ipynb

project0/06-SQL-INDEXES-AND-EXPLAIN.ipynb

project0/07-Relational-Database-Design-Normalization.ipynb

project0/DDL.sql

project0/README.md

project0/Vagrantfile

project0/create_sample_databases.py

project0/joins.jpg

project0/largeRelationsInsertFile.sql

project0/populate-air.sql

project0/relationalalgebrafunctions.py

project0/university.png

project1/SQLTesting.py

project1/answers.py

project1/queries.py