-- Finding statistics level of a column ( orders.orderdate)
-- statistics level range is 1-10000 ( where 100 means 1 percent,10000 means 100 percent)

edbstore=> SELECT attname as column_name , attstattarget as stats_level FROM pg_attribute WHERE attrelid = (SELECT oid FROM pg_class WHERE relname = 'orders') and attname='orderdate';

column_name  | stats_level
-------------+-------------
orderdate    | 1000
(1 row)

-- To change statistics level of a column:

edbstore=> alter table orders alter column orderdate set statistics 1000;