Analyze

Analyze collects statistics about the indexes and stores the results in a special table in the database to help make better index selection. Subsequently, the query optimizer uses these statistics to help make better index choices.

Analyze Database
Just simply right-click the database and select Maintain Database -> Analyze Database....

Analyze Table
Just simply right-click the table and select Maintain Tables -> Analyze Tables....

Parameters
Database Analyzes all indexes in one database when the database name is specified.
Table Analyzes all indexes in one table when the table name is specified.

Related topics:
Vacuum
Reindex