insert series into postgreSQL

Question

I want to insert a series of numbers in a postgreSQL column.The series will be

1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,2,3,3,3,3,3,3,3,3,3.....30

So 1-30 repeated 10 times each(300 rows).but I know to generate series I can use

 SELECT a.n
from generate_series(1, 100) as a(n), generate_series(1, 3)

How to insert this series into an existing table public.trip and to the column day.I tried with

update public.trip set day = generate_series(1, 30) , generate_series(1, 10);

But this is showing as an error.Any help is appreciated.

Answer 1

If you are inserting it as new data then you should use an INSERT INTO statement i this case it will be (I am assuming a.n is where the value of day is contained)

INSERT INTO public.trip(Day)
   SELECT a.n from generate_series(1, 100) as a(n), generate_series(1, 3)

if you are updating an existing record then you can use the UPDATE statement

UPDATE public.trip SET Day =  SELECT a.n from generate_series(1, 100) as a(n), generate_series(1, 3) WHERE [condition]

I hope this help