PostgreSQL function for last inserted ID

Question

In PostgreSQL, how do I get the last id inserted into a table?

In MS SQL there is SCOPE_IDENTITY().

Please do not advise me to use something like this:

Answer 1

See the below example

CREATE TABLE users (
    -- make the "id" column a primary key; this also creates
    -- a UNIQUE constraint and a b+-tree index on the column
    id    SERIAL PRIMARY KEY,
    name  TEXT,
    age   INT4
);

INSERT INTO users (name, age) VALUES ('Mozart', 20);

Then for getting last inserted id use this for table "user" seq column name "id"

SELECT currval(pg_get_serial_sequence('users', 'id'));