Create table in PL/SQL proc not working

Question

Hello,
Here is a procedure I have tried to create & run in SQL Developer:
create or replace procedure transpose as
begin
create table lines as (select level line from dual connect by level <= 5),
create table cols as (select level col from dual connect by level <= 5),
select max(decode(col, 1,
decode(line, 1, line_id,
2, description,
3, statetax,
4, freight,
5, weightedAvg))) col1,
max(decode(col, 2,
decode(line, 1, line_id,
2, description,
3, statetax,
4, freight,
5, weightedAvg))) col2,
max(decode(col, 3,
decode(line, 1, line_id,
2, description,
3, statetax,
4, freight,
5, weightedAvg))) col3,
max(decode(col, 4,
decode(line, 1, line_id,
2, description,
3, statetax,
4, freight,
5, weightedAvg))) col4,
max(decode(col, 5,
decode(line, 1, line_id,
2, description,
3, statetax,
4, freight,
5, weightedAvg))) col5
from lines, cols,
(select rownum rn, tfe_line_info.* from tfe_line_info)
where rn = col
group by line
order by line;
end transpose;
I however get the error:
Error(3,7): PLS-00103: Encountered the symbol "CREATE" when expecting one of the following: begin case declare exit for goto if loop mod null pragma raise return select update while with <an identifier> <a double-quoted delimited-identifier> <a bind variable> << close current delete fetch lock insert open rollback savepoint set sql execute commit forall merge pipe
I cannot understand what is wrong with my Create statement at line 3?

Answer 1

It looks like you have no PL/SQL experience. I suggest reading PL/SQL manual. Yes, single row select requires INTO clause. Multi-rows select requires cursor. But this is least of your problems. Your SPp will not complile even if you fix select. Why? SP creates tables dynamically at run time, so tables do not exist at SP compile time. Therefore select from these yet non-existent tables will not compile. By creating tables via dynamic SQL you forced yourself into querying them via dynamic SQL. Now you are trying to transpose (pivot) table. What Oracle version do you have? Oracle 11g provides PIVOT/UNPIVOT operators. Check them out before writing code.
SY.