Execute dynamically generated query???

Hi,

I am new to PostgreSQL and wish to do the following:

1. I am trying to execute a dynamically generated query within a function - Create table tablename as Select expressions .. from tablename, tablename where ......
The function on execution gives the following error: Select ....into is not yet implemented. Could anyone help me with a workaround for the function to be executed.

2. Select count(*) count from tab;
The following query gives the error Relation tab does not exists. Through documents i understand that it is not possible to use the above query. Has anybody tried a
workaround process for the above.

Any help would be welcome,

Thanx in advance,

Unnikrishnan Menon.