ComboBox Queries are created separately from Search Flow Queries, but are used to populate the User Input section of Search Flow Queries. ComboBox Queries can be simple select statements that return a list of data, or, they can be filtered by another user input field. An example of a filtered query might be a list of streets within the selected suburb.
ComboBox Queries can use either a Data Connection or a Map Service as the data source. Data Connections are recommended for ComboBox Queries.