I can't seem to find where I can ALTER TABLE from within Pgadmin4; I don't see any options to. I would like to edit the default values for some tables/columns as 0 instead of NULL. Thanks!
You can right click on the table of interest, then select properties
On the columns
tab, you can add a new one or edit an existing column.
By clicking on the edit
icon on its left, you gain access to finer controls. Go to the constraint
tab and there you can set the default value.