嗯,我只是做了一個示例表和您的查詢似乎寫入工作:
sqlite> create table statuses (word_id, status default -1);
sqlite> insert into statuses (word_id) values (1);
sqlite> insert into statuses (word_id) values (2);
sqlite> insert into statuses (word_id) values (3);
sqlite> insert into statuses (word_id) values (4);
sqlite> insert into statuses (word_id) values (5);
sqlite> select * from statuses;
1|-1
2|-1
3|-1
4|-1
5|-1
sqlite> UPDATE statuses SET status = 0
...> WHERE word_id = (
...> SELECT word_id FROM statuses WHERE status = -1 ORDER BY RANDOM() LIMIT 1
...>);
sqlite> select * from statuses;
1|-1
2|-1
3|0
4|-1
5|-1
因此,換句話說,你的查詢正確 - 你的錯誤可能在你的代碼中的其他地方。
當你嘗試過時發生了什麼?有問題嗎?錯誤? – stefanB 2009-06-18 06:14:16