Assertion failed: (currentSyncQueue != self && "inDatabase: was called reentrantly on the same queue, which would lead to a deadlock")这种情况一般会出现在 在队列的inDatabase或inTransaction的block里调用了该队列的inDat
转载
精选
2016-10-08 09:23:08
4222阅读
Built-Indatabase ObjectsOther objects created with the database:·Data dictionary·Performance tables·PL/SQL packages·Database event triggers Data Dictionary·Central toevery Oracl
原创
2014-12-09 09:19:35
365阅读
SQLServerhasencountered1occurrence(s)ofI/Orequeststakinglongerthan15secondstocompleteonfile[D:\Data\af_shanghai_4.ndf]indatabase[af_shanghai](7).TheOSfilehandleis0x00000960.TheoffsetofthelatestlongI/O
转载
2018-05-17 21:31:32
1415阅读
（写于December 4th, 2012） 初涉数据挖掘，算是对于数据数据挖掘的一些基础性理解。什么是数据挖掘？ 数据挖掘是数据库中知识发现（knowledgeDiscovery inDatabase,KDD）不可缺少的一部分，而KDD是将未加工的数据转换为有用信息的整个过程。PS：我认为就是从海量的数据中分析处
转载
2023-10-19 08:37:30
83阅读
