Select into ?

Question

I am trying to write an sql query, but I want to use a variable in the query. So I wrote the following procedure, just as a test:
declare l_block_size number(10);
begin
select value
into l_block_size
from v$parameter
where name = 'db_block_size';
select owner, table_name, blocks
from dba_tables
where tablespace_name = '&tablespace'
order by 3;
end;
Remember, this is just a test query, and logically doesn't make sense now (a query in progress).
There are 2 queries. The 1st one selects the block_size of my database into a variable. The 2nd one I just wanted to output to the screen, but I get the error:
PLS-00428: an INTO clause is expected in this SELECT statement
Can I do a select here without an INTO clause ? I don't want to create a procedure - just wanted to write a query I can run in SQLPLUS - using a variable.

Answer 1

PRE
myquery.sql
set serveroutput on;
DECLARE
l_block_size number(10);
-- TYPE x
-- IS RECORD (
-- owner varchar2(30),
-- table_name varchar2(30),
-- blocks number
begin
select value
into l_block_size
from v$parameter
where name = 'db_block_size';
for x in (select owner, table_name, blocks*l_block_size size
from dba_tables
where tablespace_name = '&tablespace'
order by 3)
loop
dbms_output.put_line('Owner: ' || x.owner);
dbms_output.put_line('Table: ' || x.table_name);
dbms_output.put_line('Size: ' || x.size);
dbms_output.put_line('/');
end loop;
end;
@myquery
Enter value for tablespace: ADMIN_LARGE
old 19: where tablespace_name = '&tablespace'
new 19: where tablespace_name = 'ADMIN_LARGE'
for x in (select owner, table_name, blocks*l_block_size size
ERROR at line 17:
ORA-06550: line 17, column 56:
PL/SQL: ORA-00923: FROM keyword not found where expected
ORA-06550: line 17, column 10:
PL/SQL: SQL Statement ignored
ORA-06550: line 24, column 38:
PLS-00103: Encountered the symbol "SIZE" when expecting one of the following:
<an identifier> <a double-quoted delimited-identifier> delete
exists prior
The symbol "<an identifier> was inserted before "SIZE" to continue.
/PRE