Making a custom cohort
From the Dataset Library, clicking "Browse data" for some datasets will take you to a Data Explorer. Note that you may need to request permission for the dataset before seeing the Data Explorer. Also note that anyone can see the 1000 Genomes Low Coverage Data Explorer.
Within Data Explorer, you can create a cohort and save it to your workspace.
Using a custom cohort
Your Terra workspace will contain two new entities: cohort and BigQuery_table. A cohort entity contains a SQL query representing the cohort. This SQL query returns a list of participant ids in your cohort.
Hint: Triple-click the SQL query table cell to select the entire SQL query.
The BigQuery_tables entity lists the BigQuery tables in your dataset. The cohort SQL query can be joined with these BigQuery tables.
Creating a Data Explorer for your dataset
If your dataset lives in BigQuery, you can create a Data Explorer for your dataset. Please see https://github.com/DataBiosphere/data-explorer for more information.