How do I copy data from one table to another in postgres using copy command

Question

We use copy command to copy data of one table to a file outside database.

Is it possible to copy data of one table to another table using command.

If yes can anyon

Answer 1

You cannot easily do that, but there's also no need to do so.

CREATE TABLE mycopy AS
SELECT * FROM mytable;

or

CREATE TABLE mycopy (LIKE mytable INCLUDING ALL);

INSERT INTO mycopy
SELECT * FROM mytable;

If you need to select only some columns or reorder them, you can do this:

INSERT INTO mycopy(colA, colB)
SELECT col1, col2 FROM mytable;

You can also do a selective pg_dump and restore of just the target table.