прак№1

create schema std2_27;

create table std2_27.table1
(
field1 int,
field2 text
)
distributed by (field1);

insert into std2_27.table1
select a, md5(a::text)
from generate_series(1, 1000) a;

select gp_segment_id, count(1) from std2_27.table1 group by 1;