摘要： zhttp://blog.163.com/yiyun_8/blog/static/100336422201031505832337/nowait的含义很多人都会误解为“不用等待，立即执行”。但实际上该关键字的含义是“不用等待，立即返回”如果当前请求的资源被其他会话锁定时，会发生阻塞，nowait可以避免这一阻塞，因为If another user is in the process of modifying that row, we will get an ORA‐00054Resource Busy error. We are blocked and must wait for the ot 阅读全文