reset auto increment postgres primary key code example

Example 1: postgresql reset auto increment

-- if you dont mind losing the data, do the following
TRUNCATE TABLE someTable RESTART IDENTITY;

Example 2: postgresql reset auto_increment index

-- Change the starting value of the sequence

ALTER SEQUENCE project_id_seq RESTART 3000;

-- Same but dynamic :

SELECT SETVAL('project_id_seq', (SELECT MAX(id) + 1 FROM project));