PostgreSQL Syntax error, can't find it - postgresql

Question

I have a code which creates 6 templates, adds data to them, merges them and export it as data. I can make it work by using F5 on different paragraphs, but I want to make the whole code work. Can someone help me, I am pretty new.
CREATE TEMP TABLE john1
(email VARCHAR(200));
COPY john1(email) from 'E:\WORK\FXJohn1.csv' DELIMITER ',' CSV HEADER
CREATE TEMP TABLE john2
(email VARCHAR(200));
COPY john2(email) from 'E:\WORK\FXJohn2.csv' DELIMITER ',' CSV HEADER
CREATE TEMP TABLE john3
(email VARCHAR(200));
COPY john3(email) from 'E:\WORK\FXJohn3.csv' DELIMITER ',' CSV HEADER
CREATE TEMP TABLE john4
(email VARCHAR(200));
COPY john4(email) from 'E:\WORK\FXJohn4.csv' DELIMITER ',' CSV HEADER
CREATE TEMP TABLE john5
(email VARCHAR(200));
COPY john5(email) from 'E:\WORK\FXJohn5.csv' DELIMITER ',' CSV HEADER
CREATE TEMP TABLE john6
(email VARCHAR(200));
COPY john6(email) from 'E:\WORK\FXJohn6.csv' DELIMITER ',' CSV HEADER
CREATE TABLE finished AS
(SELECT * FROM john1
UNION
SELECT * FROM john2
UNION
SELECT * FROM john3
UNION
SELECT * FROM john4
UNION
SELECT * FROM john5
UNION
SELECT * FROM john6);
DO $func$
BEGIN
EXECUTE $$
COPY public."finished" TO 'E:\$$ || to_char(CURRENT_DATE, 'YYYY_MM_DD') || $$.csv' DELIMITER ',' CSV HEADER;
$$;
END;
$func$ LANGUAGE plpgsql;
#Rupert
Sorry, but for some reason this script is not running for me, I get this error:
ERROR: syntax error at or near "for" LINE 1: for x in $(ls FXJohn1*.csv);
Do I change the variables correctly?
for x in $(ls file_name*.csv);
| I change file_name to one of my .csv in the folder|
do psql -c "copy table_name from
| I change table_name to my current table name I've created|
'/path/. todir/$x' csv" db_name; done
| I change path to E:\WORK (there are my all my csv files.

Answer 1

Firstly you can load multiple .csv files into the same table. So let's set that up first:
CREATE TABLE finished
(
email varchar(200)
)
Then you can load multiple files from the same folder using a simple bash script:
for x in $(ls file_name*.csv);
do psql -c "copy table_name from
'/path/. todir/$x' csv" db_name; done
This saves you doing multiple 'copies' and then the multiple UNIONs.
Then you can run your script:
DO $func$
BEGIN
EXECUTE $$
COPY public."finished" TO 'E:\$$ || to_char(CURRENT_DATE,
'YYYY_MM_DD') || $$.csv'
DELIMITER ',' CSV HEADER;
$$;
END;
$func$ LANGUAGE plpgsql;