select * from test where rowid=last_insert_rowid() SELECT save_user.username,save_user.registertime,save_user.lastlogin,sum(length(save.content)) FROM save_user LEFT JOIN save ON save.username=save_user.username GROUP BY save.username ORDER BY save_user.registertime D update t1 set content=cast(content||'a' as BLOB) SELECT id,category2_id,directory,origin_launcher FROM game WHERE category2_id=(SELECT id FROM category2 WHERE category1_id=(SELECT id FROM category1 WHERE name='玩游戏') AND name='网络游戏') SELECT CAST(substr(filecontent,1,204800) AS BLOB) FROM ad_application WHERE id=3 原文链接：https://www.f2er.com/sqlite/199164.html