The differences in SQL and Relational Algebra are not that many. In fact, they are pretty much the same thing. Both of them have commands that need to be evaluated in order to get a result or a new table. In the SQL, we have commands that need to be followed step by step. For example, the first thing we need to know if we need to join tables. After that, we need to know what columns or fields we are putting as a result, then what table or tables are those columns coming from, and last if there is a criteria, the result will be based on that criteria. For all of these content, the rules are: there is the SELECT, FROM, and WHERE operations that we need to follow in order to get a new table. In the Relational Algebra, the situation is pretty much
