Tuples are not inserted sequentially in database table?

Question

I am trying to insert 10 values of the format \"typename_\" + i where i is the counter of the loop in a table named roomtype with attributes typename

Answer 1

You are not seeing the order in which PostgreSQL stores the data, but rather the order in which pgadmin displays it.

The edit table feature of pgadmin automatically sorts the data by the primary key by default. that is what you are seeing.

In general, databases store table data in whatever order is convenient. Since you did not intentionally supply an ORDER BY you have no right to care what order it is actually in.