Removing duplicate row from SQLite3 - sqlite

Question

I have a SQLite3 DB with ~10,000 rows of data.
The schema is like this:
id, stock_id, body, stock_created_at, symbol, updated_at, created_at
The PK is id with no FK
You can tell there is a duplicate if the stock_id is duplicated.
I have a MySQL query like this that I used to use, but it's for MySQL and not SQLite:
DELETE FROM stocks WHERE id NOT IN
(SELECT MAX(id) FROM table GROUP BY stock_id);

Answer 1

Using SQLite3 (SQLite version 3.8.10.2 2015-05-20 18:17:19):
sqlite> create table test (id int, stock_id int, symbol text);
sqlite> insert into test values (1, 1, 'GOOG');
sqlite> insert into test values (2, 1, 'GOOGL');
sqlite> insert into test values (3, 2, 'AAPL');
sqlite> select * from test;
id stock_id symbol
---------- ---------- ----------
1 1 GOOG
2 1 GOOGL
3 2 AAPL
sqlite> delete from test
...> where id in (
...> select max(id) from test
...> group by stock_id
...> having count(*) > 1
...> );
sqlite> select * from test;
id stock_id symbol
---------- ---------- ----------
1 1 GOOG
3 2 AAPL
If stock table was a completely different table, the same concept works quite well:
sqlite> create table stock (stock_id int);
sqlite> insert into stock values (1);
sqlite> insert into stock values (2);
sqlite> insert into stock values (3);
sqlite> delete from stock
...> where stock_id in (
...> select max(id) from test
...> group by stock_id
...> having count(*) > 1
...> );
sqlite> select * from stock;
stock_id
----------
1
3
Does this kind of query work for you? If not, what SQLite version are you using and can you edit your question with example data?