Postgres SQL: INSERT from DELETE

Question

I have a table with id,user_id,timestamp and I'm trying to INSERT into the table, the user_id from a DELETE from table where id=some_number and timestamp. So what I'm trying to achieve looks like:

INSERT INTO table (user_id,timestamp)
VALUES (
    (DELETE FROM table WHERE id=some_number returning user_id),
    current_timestamp+'1 day'
)
RETURNING *;

I am getting a syntax error doing this... Can someone help me here plz...?

Answer 1

You can use a data modifying common table expression:

with deleted as (
  DELETE FROM some_table
  WHERE id = 42
  returning user_id
)
INSERT INTO other_table(user_id, "timestamp")
select user_id, timestamp '2020-01-04 21:32:34'
from deleted;