To access feature type parameters, click the gear icon 
on a feature type in the workspace to open the Feature Type Parameter Editor. To always display the editor in Workbench, you can select View > Windows > Parameter Editor.
General
All feature types share similar General parameters, including the Feature Type Name, Reader or Writer Name, and Geometry.
In most Writer Feature Type parameter dialogs, you can also control Dynamic Schema Definitions. Some database formats accept a Table Qualifier prefix on the output table feature type.
See Editing Writer Feature Types for more information.
These parameters apply only to a selected feature type, not to the entire writer.
Tip: If a feature type parameter listed here conflicts with a writer-level parameter, then the writer parameter will be ignored and this feature type parameter will be used.
Table Settings
Create Table
Create destination table/list if it does not exist.
Drop Existing Table
If a table already exists with this name, it should be dropped and recreated before any features are written to it.
Writer Mode
When Create Table is set to No, this parameter lets the user specify how features will be written into the destination table. Supported feature operations are:
- Insert: Append rows onto the destination table using attributes on features.
- Update: Update existing table columns using attributes on features. A selection method must be specified in the Row Selection group.
- Delete: Delete existing table rows. A selection method must be specified in the Row Selection group.
More information about Writer Mode.