QSqlQuery删除sqlite数据库执行drop数据表报错database table is locked unable to fetch row问题参考:https://blog.csdn.net/ai777o/article/details/145786118?utm_medium=distribute.pc_relevant.none-task-blog-2~default~baidujs_baidulandingword~default-13-145786118-blog-130593264.235^v43^pc_blog_bottom_relevance_base5&spm=1001.2101.3001.4242.8&utm_relevant