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19、Which two can be backed up by using RMAN when a database Is open in ARCHIVELOG mode, so that me
查询是否发生了索引碎片 SELECT object_name(dt.object_id) Tablename,si.name Indexname,dt.avg_fragmentation_in_p
57、Which two statements are true about dispatchers used by the Oracle shared server? A. Multiple
69、Which is true about unusable indexes? A. Rebuilding an unusable index always requires at least
20、Your database is using Automatic Memory Management. Which two SGA components must be managed m
【OGG】OGG基础知识整理 一、GoldenGate介绍 GoldenGate软件是一种基于日志的结构化数据复制软件。GoldenGate 能够
整理一篇工作中的JavaScript工作脚本笔记，学而三省吾身。 (1) 获取Url绝对路径 function getUrlRelativePath()
70、Which two are true about space management in tablespaces? A. Free lists are used for managing
65、Which three structures can span multiple data files? A. chained rows B. segments C. tempor
表碎片的来源当针对一个表的删除操作很多时，表会产生大量碎片。删除操作释放的空间不会被插入操作立即重用，甚至永远也不会被重用。怎样确定是否有表碎片-- 收集表统计信息SQL> exec dbms_
