Which of the following statements is NOT true about online analytical processing?

OLAP tools enable users to analyze different dimensions of data beyond simple data summaries.

In OLAP, the use of dedicated databases allows for tremendous increases in data retrieval speed.

OLAP systems preaggregate data so that only the subset of the data necessary for the query is extracted.

OLAP systems typically use transaction$-$reasoning methods based on knowledge about a specific problem domain in order to provide advice.

The OLAP server understands how data are organized in the database and has special functions for analyzing the data.