How to export/spool large table to file in Oracle - sql

Question

What are the convenient way to export/spool large table (43 million records) to single file in Oracle?
(Once we get the exported file, the purpose is to handle it in a Shell Script running in Solaris with kshell, but it is another history).
Our first try generated an empty file:
SET NEWPAGE 0;
SET LINESIZE 169;
SET PAGESIZE 0;
SET VERIFY OFF;
SET TERMOUT OFF;
SET COLSEP '';
SET FEEDBACK OFF;
SET HEADING OFF;
SPOOL THE_MONSTER_FILE.txt;
SELECT
a.field1, a.field2, b.field1, b.field2
FROM
tableA a, tableB b,
WHERE
a.id = b.id(+);
SPOOL OFF;
COMMIT;
EXIT;

Answer 1

You can export the result set into a CSV file. Create a shell script and let it running on background, like this:
#!/bin/bash
cat <<EOF > THE_MONSTER_SCRIPT.sql
SET COLSEP ;
SET HEADSEP OFF
SET VERIFY OFF
SET HEADING OFF
SET ECHO OFF
SET FEEDBACK OFF
SET LONG 2000000000
SET LINESIZE 1000
SET PAGESIZE 0
SET TRIMSPOOL ON
SPOOL THE_MONSTER_FILE.csv;
SELECT
a.field1, a.field2, b.field1, b.field2
FROM
tableA a, tableB b,
WHERE
a.id = b.id(+);
SPOOL OFF
EXIT
EOF
nohup sqlplus system/password#INSTNAME #THE_MONSTER_SCRIPT.sql &
If any of the columns on the result set have the column separator in its value, you have to enclose the columns with double quotes, replacing double quotes in the column value with two double quotes. Example:
/*
* ----------------
* | col1 | col2 |
* ----------------
* | a"a;a | aaa |
* | bbb;b | b"b |
* ----------------
*/
will turn into:
/*
* "a""a;a";"aaa"
* "bbb;b";"b""b"
*/

Answer 2

You can easily do with help of SSIS packages.
Check link Here.