How to reset Postgres SERIAL number
When testing a table with a SERIAL field, this number will grow even if you remove all items in the table (like you’d do during testing), so you might insert a value and its id is 15 for example.
To restart the sequence from 1, run the SQL query:
ALTER SEQUENCE TABLENAME_id_seq RESTART
Replace TABLENAME with your table name, like:
ALTER SEQUENCE users_id_seq RESTART
Using TablePlus you have the option to reset the sequence when you truncate a table to remove its content.
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