SQL Query to return N rows from dual

Question

I want to write a SQL query which accepts a bind variable (say :NUM) and its output consists of one column & :NUM number of rows, each row having its row number. i.e. if we

Answer 1

Depends on database various method can be used.

PostgreSQL has a nice feature -- series.

To get what you want just want:

SELECT * FROM generate_series(1, NUM);