The ease and ubiquity of SQL have even led the creators of many “ NoSQL ” or non-relational data stores, such as Hadoop, to adopt subsets of SQL or come up with their own SQL-like query languages.

The query processor software executes relational algebra instructions interactively, allowing students to view intermediate result tables. Thus, students can learn relational algebra the same way ...

Tables are grids, similar to spreadsheets that have rows, columns, and headers. In dealing with a relational database, everything is a grid. Obviously, tables are grids, views are grids, and the ...

Structured query language Structured Query Language is also known as SQL. It is used to create queries that interrogate the data held in a relational database. Examples are: ...