800 columns in an OLTP is insane, that was my reaction when I read the OP. But in analytics it's not so unusual, although at that point a SQL DB is probably no

800 columns in an OLTP is insane, that was my reaction when I read the OP. But in analytics it's not so unusual, although at that point a SQL DB is probably not the right solution anyway, and the data scientists probably do need all the columns.