The adapter models the data in SharePoint into a list of tables that can be queried using standard SQL statements.
Generally, querying SharePoint 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.
SharePoint Adapter Tables
|Attachments||Read or delete Attachments for the specified item on the specified list.|
|Groups||Create, update, delete, and query Groups from SharePoint.|
|Roles||Create, update, delete, and query Roles from SharePoint.|
|Users||Update, delete, and query Users from SharePoint.|
|Views||Create, update, delete, and query the available lists in SharePoint.|