#1990

ORA-19905: log_archive_format must contain %s, %t and %r

文档解释ORA-19905:log_archive_formatmustcontain%s,%tand%rCause:log_archive_formatismissingamandatoryformatelement.StartingwithOracle10i,archivedlogfilenamesmustcont...

ORA-19904: test recovery not allowed for datafile string

文档解释ORA-19904:testrecoverynotallowedfordatafilestringCause:ThespecifieddatafilehasbeenrestoredfromabackupthatwastakenbeforethelastRESETLOGS.Recoveringthisdatafi...

ORA-19908: datafile string has invalid checkpoint

文档解释ORA-19908:datafilestringhasinvalidcheckpointCause:Thespecifieddatafilehasaninvalidcheckpoint.Action:Restorethedatafilefromabackup....

ORA-19909: datafile string belongs to an orphan incarnation

文档解释ORA-19909:datafilestringbelongstoanorphanincarnationCause:Eitherthespecifieddatafilewasrestoredfromabackupthatwastakenduringaperiodoftimethathasalreadybeend...

MySQL Error number: MY-011990; Symbol: ER_IB_MSG_165; SQLSTATE: HY000

文档解释Errornumber:MY-011990;Symbol:ER_IB_MSG_165;SQLSTATE:HY000Message:%s错误说明:ER_IB_MSG_165是MySQL的一种错误,它以“InnoDB:致命错误:表内存区上未能安装插槽”的形式显示。MySQL错误ER_IB_MSG_165被称为“致命...

吴裕雄--天生自然python学习笔记:爬取我国 1990 年到 2017年 GDP 数据并绘图显示

绘制图形所需的数据源通常是不固定的,比如,有时我们会需要从网页抓取,也可能需从文件或数据库中获取。利用抓取网页数据技术,把我国1990年到2016年的GDP数据抓取出来,再利用MatplotUb进行绘图显示。经搜索发现,http://value500.com/M2GDP.html网页中有我们所需数据。 &nb...

jquery插入第一个元素? [问题点数:20分,结帖人zsw19909001]

JavaScriptcode ?12345<div id="contain">   <p>1</p>   <p>2</p>   <p>3&...