The add-in models the data in Google Calendar into a list of tables that can be queried using standard SQL statements.
Generally, querying Google Calendar tables is the same as querying a table in a relational database. Sometimes there are special cases, for example, including a certain column in the WHERE clause might be required to get data for certain columns in the table. This is typically needed for situations where a separate request must be made for each row to get certain columns. These types of situations are clearly documented at the top of the table page linked below.
CData Excel Add-In for Google Calendar Tables
|AccessControlRules||Create, update, delete, and query access control rules to calendars' resources.|
|AllCalendars||Create, update, delete, and query all calendar events in your Google Account.|
|Calendars||Create, update, delete, and query calendars in Google.|
|MyCalendar||Create, update, delete, and query events of the calendar.|