Oracle

"Many of our friends know that Oracle is translated into Chinese as "myth, metaphor", but it is often said that "oracle" what is the problem? This is because in ancient China, the text was engraved on the shell to show God's instructions. The name

// View all database objects in the Oracle databaseSelect * From dba_objects// View database objects that meet specific conditionsSelect * From dba_objects where owner = 'user1' // View database version informationSelect * From

Oracle creates a server process to process requests from user processes connected to the instance. A server process can be a dedicated server process. At this time, the server process serves only one user process. If the database server is

The tablespace to be generated is generally performed by DBA or privileged users. To generate a tablespace as another identity, this user must be granted the create tablespace permission. When a tablespace is generated, a data file is generally

1. Default Processing Oracle considers null as the maximum value by default in order by, so if it is ASC in ascending order, it is placed at the end, and desc in descending order is placed at the top.   2. Use the nvl Function The nvl

Set the primary key and auto-increment the primary key in the Oracle table. Because Oracle cannot directly set the auto-increment number, you can only write sequence and add a trigger on your own; After searching for a while on the network, I found

1. Oracle startup and Shutdown 1. In a single-host environment To start or shut down the Oracle system, you must first switch to the Oracle user, as shown below: Su-Oracle A. Start the Oracle SystemOracle> svrmgrlSvrmgr> connect internalSvrmgr>

Excerpt 11. Use the Oracle Net manager tool(1) Open Oracle Net Manager(2) Add "service name"Step 1. net service name: enter any nameStep 2 Communication Protocol: If you connect to Oracle on a remote machine, select TCP/IP (Internet Protocol)Step 3.

The current user password can be encrypted with an unrecoverable MD5 to enhance security. It is very easy to implement the MD5 Algorithm in Java.   This algorithm is used to initialize data. If a system is ready, 10000 pieces of enterprise data

Install Oracle 10g R2 on centos5 I. Basic ConditionsGraphic Interface, in addition to Kde, full installationTo install a browser, you can connect to the Internet It is best not to start SELinux Vim/etc/sysconfig/SELinux Remove unnecessary services,

Type Selection: 32-Bit Memory is a bottleneck and is already in the 64-bit era. Use 64-bit centos6 and 64-bit Oracle 11g r2Install VMWare Player 5 on a virtual machine and set the network in hostonly ModeNote: For NICs that can access the Internet,

Java class MySQL Oracle Bytes Range Character Char (1) Char (1) 2 0 ~ 65535 String Varchar (255) Varchar2 (255)     String-clob Longtext Clob     Date-date Date

Document directory Summary Oracle Database is installed in data files left behind by drive dThe file distribution structure is as follows:D:/Oracle/oradata/YuControl01.ctl control02.ctl control03.ctlIndx11.dbf indx12.dbf indx13.dbf

Decompress the 10__database_win32.zip \ database.zip package of Oracle 10g. decompress the package and complete the prerequisites for Oracle Installation. Then, you do not know why a memory error is reported. Then I checked all kinds of information.

1. What is a bare device?A bare device, also called a raw partition, is a special character device that is not formatted and not read by UNIX through a file system. It is read and written by the application. It is not buffered by the file system. 2.

---- Use ORACLE as a database management platform in large and medium-sized database management systems at home and abroad Many. Whether it is database management capabilities or security, Oracle is beyond reproach. The display of word information

Error in ORA-12705: cannot access NLS data files or invalid environment specified  Oracle client installation-free use of PL/SQL, toad for Oracle and other managers to connect Oracle9i, 10g, 11g As we all know, the oralce client is several hundred

Summary of Oracle stored procedure execution through SQL linked server1. ExampleWe can use the following method to run the Oracle stored procedure in SQL Server through linked server.(1) Oracle packagePackage test_packageType t_t is table of varchar2

Trigger usage tutorial and naming rulesContentsTrigger usage tutorial and naming convention 11. Trigger Introduction 12. Trigger Example 23. Trigger syntax and function 34. Example 1: one row-Level Trigger 45. Example 2: Row-Level Trigger 2 46.

1. Automatic workload warehouse Oracle collects a large amount of performance and action-related statistics. This information is accumulated in the memory and regularly written to the disk (that is, the table that constitutes the AWR ). Eventually,