Orchidelle

摘要： ssh vi /etc/apt/sources.list su ssh username@ipaddress eg : ssh root@172.16.247.143 实验一 fdisk /dev/sdb (create partitions) mdadm --create /dev/md0 --l 阅读全文

摘要： 数据库DBA任务： 管理数据库可用性 设计并创建数据库 管理物理结构 管理基于设计的存储 管理安全性 网络管理 备份与恢复 数据库调整与优化 关系型数据库（RDBMS） 多个表数据之间存在着关系 关系用来描述多个表之间的数据依存，包括一对一，一对多，多对多的关系。 这些关系在Oracle数据库中表现 阅读全文

摘要： DDL commands --> create user / table / view / sequence alter DML --> data manipulation language (insert, select, update, delete) eg : SELECT ename FRO 阅读全文

摘要： debug iapp through debug ip ftp debug iapp : to begin debugging of IAPP operations(in privileged EXEC mode) no debug iapp debug idmgr : to enable debu 阅读全文

摘要： a hot potato : speak of an issue(mostly current) which many people are talking about and which is usually siaputed. add insult to injury : to further 阅读全文

摘要： flow control the if statement syntax : IF condition1 THEN action1; [ELsIF condition2 THEN action2; [ELSE action3;] END IF; eg : IF condition THEN SQL 阅读全文

摘要： SQL is not very flexible and it cannot be made to react differently to differing sutuations easily. In SQL queries we normally tell database what we w 阅读全文

摘要： Procedural Language for SQL query a database and manipulate data understand the goals of the PL/SQL cursus explain the need for PL/SQL and the benefit 阅读全文

摘要： clear license agent : to clear license agent statistics counters or connection statistics (in privileged EXEC mode) debug license : to enable controll 阅读全文

摘要： absolute : to specify an absolute time for a time-range (in time-range configuration mode) no absolute buffer-length : to specify the maximum length o 阅读全文