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转 http://blog.csdn.net/risingsun001/article/details/38977797 MySQL replace into 用法(insert into 的增强版) 在向表中插入数据的时候,经常遇到这样的情况:1. 首先判断数据是否存在; 2. 如果不存在,则插入 阅读全文
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1. RMAN Repeatedly Fail To Backup Archivelogs with RMAN-20242 Cause:There is a mis-match between the catalog contents and what is physically on disk i 阅读全文
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sample 1: add a new cdb 1.for the new db Aprodplease apply two new direcotry in Cdb3/Cdb4/Aprod 50G/Aprodlog 20G Aproddb 目前挂载在Cdb4,相关信息如下: 文件系统:/dev/v 阅读全文