Estimates Are Supposed to Be Based on Normal Conditions

question 28

True/False

Estimates are supposed to be based on normal conditions. While this is a good starting point, it rarely holds true in real life.

---

Definitions:

Cardinality

In the context of databases, it refers to the uniqueness of data values contained in a column. Higher cardinality means more unique values.

Cardinality

In database design, the numerical attributions of relationships between entities, indicating the degree of association such as one-to-one, one-to-many, or many-to-many.

Hyperlinks

Elements in electronic documents that link to another section of the same document or to an entirely different document.

Join Operation

A database operation that combines records from two or more tables in a database.