Quick SQL command to find large tables in redshift

large_redshift_tables.sql

-- based on http://stackoverflow.com/questions/21767780/how-to-find-size-of-database-schema-table-in-redshift
SELECT name AS table_name, ROUND((COUNT(*) / 1024.0),2) as "Size in Gigabytes"
FROM stv_blocklist
INNER JOIN
(SELECT DISTINCT id, name FROM stv_tbl_perm) names
ON names.id = stv_blocklist.tbl
GROUP BY name
ORDER BY "Size in Gigabytes" DESC

Show the database name

SELECT name AS table_name, datname, ROUND((COUNT(*) / 1024.0),2) as "Size in Gigabytes"
FROM stv_blocklist
INNER JOIN
(SELECT DISTINCT id, name, datname, db_id FROM stv_tbl_perm
INNER JOIN
pg_database on stv_tbl_perm.db_id = pg_database.oid
) names
ON names.id = stv_blocklist.tbl
GROUP BY name, datname
ORDER BY "Size in Gigabytes" DESC

Very useful!! Thanks @subelsky