2-2 Quiz

Relational data is based on which three mathematical concepts? Select all that apply.

A domain A tuple A relation

Which of these answers are relational operations? Select all that apply.

A join Projection Selection

Which of the following are SQL operators? Select all that apply.

Arithmetic Comparison Logical

In the relational data structure, which components are named?

Data type, table, column

What is big data? Select one.

Massive volumes of online data

What are the components of a column?

Name and data type

What is database independence? Select one.

Rows and columns of a table that have no inherent order

A table must have at least one column and any number of rows. A table without rows is called an empty table.

True

In relational databases, each individual space within a row or column contains exactly one value.

True

NULL represents either "unknown" or "inapplicable."

True