Get default serial value after INSERT inside PL/pgSQL

Question

I have a table. I wrote a function in plpgsql that inserts a row into this table:

INSERT INTO simpleTalbe (name,money) values(\'momo\',1000) ;

Answer 1

select nextval('serial'); would not do what you want; nextval() actually increments the sequence, and then the INSERT would increment it again. (Also, 'serial' is not the name of the sequence your serial column uses.)

@Erwin's answer (INSERT ... RETURNING) is the best answer, as the syntax was introduced specifically for this situation, but you could also do a

SELECT currval('simpletalbe_id_seq') INTO ...

any time after your INSERT to retrieve the current value of the sequence. (Note the sequence name format tablename_columnname_seq for the automatically-defined sequence backing the serial column.)