How do you incorporate a .SQL file in another script?

Question

I have a SELECT statement in a file that cannot be altered and must be run as it is sent to me. I am creating another table using this SELECT statement. I just want to run my own script which gets part of its content from the one sent me. That way, if the - you might call it 'sub script' changes, I won't have to change anything. It goes something like the following, though this is greatly changed and simplified.
But I want to read everything in the block from a separate file rather than have it copied and pasted every time as it is now. Thank you.
select e.emp_ID
,e.data1
,e.data2,
from empdata e
     BEGINNING OF THE MAIN REPORT (this is pasted
from other suq-query at the present moment)
select distinct w.emp_ID, w.empwages
from wages w
     END OF THE MAIN QUERY
) main
WHERE
main.wages > 40

Answer 1

Another way to read OS file data in SQL is using External Tables.
Random example (there are more in the documentation):
CREATE TABLE test_external
( id   NUMBER(8)
, col1 VARCHAR2(20) )
ORGANIZATION EXTERNAL
( TYPE oracle_loader
  DEFAULT DIRECTORY william_data
  ACCESS PARAMETERS
  ( RECORDS DELIMITED BY newline
    LOGFILE 'test_external.log'
    FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"'
    ( id
    , col1 )
  LOCATION ('test_ext2.dat','test_ext1.dat')
);The OS file directory is specified indirectly. Rather than putting '/somewhere/data' in the table creation command, you create a directory object using
CREATE DIRECTORY william_data AS '/somewhere/data';Notice you can specify more than one data filename (you'll probably only need one). You can also change this attribute with ALTER TABLE.
Notice the line "TYPE oracle_loader" - the ORACLE_LOADER access driver is documented here (there is also an "ORACLE_DATAPUMP", which you don't want).
Once set up, you just query the table and it reads the file.