4.show databases Oracle: selectnameasdatabasefromv$database;
4 rows in set (0.00 sec) Oracle 一个实例,就是一个数据库, 所以,没有对应的 show databases 语句 所以对于oracle: 1当前存在什么数据库: C:\Windows\System32>sqlplus SQL*Plus: Release 10.2.0.3.0 - Production on 星期六 6月 22 17:51:39 2013 Copyright (c) 1982, 2006, Oracle. All Rights R...
一个Oracle进程拥有一个PGA内存区。一个PGA也只能被拥有它的那个服务进程所访问,只有这个进程中的Oracle代码才能读写它。因此,PGA中的结构是不需要Latch保护的。 我们重点就是设置SGA,理论上SGA可占OS系统物理内存的1/2——1/3 ORACLE给的建议是: OLTP系PGA=(Total Memory)*80%*20%。DSS系统PGA=(Total Memory...
oracle中与mysql中的命令showdatabases,showtables,des。。。1 怎样执⾏⼀个sql脚本⽂件，这个脚本⽂件写了⼀系列的sql语句集，⽐如sql.sql 放在D:\MyEclipse 8.6\Workspaces\OASystem\WebRoot\sql.sql下 》cd D:\MyEclipse 8.6\Workspaces\OASystem\WebRoot\ >>sqlplus >>@ sql.sql;2 怎样查看刚刚...
Show all tables in an Oracle database Use the SQL*Plus DESCRIBE command Show all tables with dbForge Studio for Oracle View tables in Object Viewer List tables in Oracle using data dictionaries Data dictionaries are sets of specific tables that provide information about their associated databases....
有，直接查询语句就可以；select * from dba_data_files select * from dba_tables
Let’s see them in more detail. Show Databases in Oracle Oracle has a different server-database model to SQL Server and MySQL, called Container Databases and Pluggable Databases. I’ve written aguide to them here. If you want to see the current name of the database: ...
Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or 'h' for help. Type 'c' to clear the current input statement. mysql> show databases: ...
I need to check which databases are present, and put them in an ArrayList. I always get a nullpointer exception, here is part of my code: public ArrayList List(cfg c){ String url = "jdbc:mysql:"; String driver = "com.mysql.jdbc.Driver"; ...
When you enable text-searching capability toOracle NoSQL Database, in-concert with the tables interface, theshow parametercommand also provides information on the Elasticsearch cluster name and transport port as values for the parameters searchClusterMembers and searchClusterName. ...