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

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 anyone please share the query.

Or is there any better approach like we can use pg_dump or something like that.

Solution #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.

Respondent: Craig Ringer
Solution #2:

If the columns are the same (names and datatypes) in both tables then you can use the following

INSERT INTO receivingtable (SELECT * FROM sourcetable WHERE column1='parameter' AND column2='anotherparameter');
Respondent: Steve Irwin
Solution #3:

Suppose there is already a table and you want to copy all records from this table to another table which is not currently present in the database then following query will do this task for you:

SELECT * into public."NewTable" FROM public."ExistingTable";
Respondent: Manish Jain
The answers/resolutions are collected from stackoverflow, are licensed under cc by-sa 2.5 , cc by-sa 3.0 and cc by-sa 4.0 .

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