Oracle SQL UPDATE SELECT with JOIN got error - sql

Question

Here is my SQL Query
UPDATE
(SELECT
*
FROM
web_fe_ipo_ipo_application apps
INNER JOIN web_fe_ipo_ipo_entry ipo ON apps.ipo_link_id = ipo.ipo_ref_number
WHERE
( ( apps.status = 0
OR ( apps.status = 2
AND apps.sub_status = 0
AND ipo.enable_omnibus_account = 1 ) )
AND ( apps.applied_qty BETWEEN 1 AND 10 )
AND apps.ipo_link_id = '984'
AND apps.latest = 1
AND ipo.latest = 1
AND apps.tranche_name = 'Public-1' )
ORDER BY
ipo_random(50)
FETCH FIRST 5 ROWS ONLY) selection
SET selection.initial_allot_qty = 5;
but it was not working well
I need to select random data from table then update after execute this query I got bellow error
Error at Command Line : 20 Column : 5
Error report -
SQL Error: ORA-01733: virtual column not allowed here
01733. 00000 - "virtual column not allowed here"
*Cause:
*Action:

Answer 1

Use a MERGE statement.
Here is an example:
MERGE INTO workers e
USING data_works h -- You can use the SELECT statement as well.
ON (e.f_id= h.f_id)
WHEN MATCHED THEN
UPDATE SET e.address= h.address
WHEN NOT MATCHED THEN
INSERT (f_id, address)
VALUES (h.f_id, h.address);
Here is your code. Hope it will work.
MERGE INTO web_fe_ipo_ipo_application apps
USING (SELECT * FROM web_fe_ipo_ipo_entry ipo ORDER BY
ipo_random)
ON(apps.ipo_link_id = ipo.ipo_ref_number)
WHEN MATCHED THEN
UPDATE SET apps.initial_allot_qty = 5
WHERE apps.status = 0
OR(apps.status = 2
AND apps.sub_status = 0
AND ipo.enable_omnibus_account = 1)
AND apps.applied_qty BETWEEN 1 AND 10
AND apps.ipo_link_id = '984'
AND apps.latest = 1
AND ipo.latest = 1
AND apps.tranche_name = 'Public-1'
AND rownum <=5;
Use the MERGE statement to select rows from one or more sources for INSERT or UPDATE operations in a table or view.
You can specify conditions to determine whether the target table or view is updated.
Merge operation is a convenient way to combine multiple operations. It allows you to avoid multiple INSERT, UPDATE, and DELETE DML statements as well.