Re: Strange sequences - how to construct? - Mailing list pgsql-novice

Good afternoon to everybody.

I wish to construct some weird sequences.

1

1

2

2

&c.

and with  3 ones, 4 ones... &c.

Now, I know how to do a simple

1

2

3

4

using both GENERATE_SERIES and using a RECURSIVE CTE.

What I would like is to be able to construct my specified sequences using *_both_* GENERATE_SERIES *_and_* RECURSIVE CTEs.

Regards,

SQL Padawan!

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GENERATE_SERIES: select unnest(array[x, x]) x from generate_series(1, 5) x;

RECURSIVE CTE: with recursive x as ( select 1 x union all select x + 1 from x where x < 5) select unnest(array[x, x]) x from x;