Oracle

Oracle permission settings I. Classification of authority: System permissions: The system requires users to use the database permissions. (System permissions are for users). Entity permissions: The access rights of a user to a table or view of

In the first case: If the Oracle server is installed on this machine, it is not much to say, the connection is only the user name and password problem. However, be aware that the environment variable%oracle_home%/network/admin/is set. In the second

How to modify the database name (db_name) and instance name (instance_name or service_name) Nid is a tool that Oracle has provided from 9IR2 and can be used to change the database name without having to go through the cumbersome ways of rebuilding

The content of this lesson belongs to Oracle Advanced Course category, the content is slightly biased in theory, but it is closely related to the development and management of database program, optimization, and other parts of this lesson in the

Although the database system is slow to run, it is clear that the cost of the latter loss is self-evident in the case of loss of database data. The minimum requirement for DBAs to improve system performance at least when data is not lost is

Recover deleted dataFirst, create the simulation environment Copy Code code as follows: Sql> CREATE TABLE Hr.xifenfei (ID number,name varchar2) tablespace xff; Table created. sql> INSERT INTO Hr.xifenfei values (1, ' Xifenfei '); 1 row

Directory structure: 1_ Crazy Java_ Crazy Software _ Showengi teacher _oracle_oracle installation of the server Video content includes: oracle10g server download, installation, uninstall and things to note. 2_ Crazy Java_ Crazy Software _ Showengi

Requirements Description： Need to check out a customer one year those days is a continuous business implement SQL as follows： To create a table: Copy Code code as follows: CREATE TABLE Test_num (Tyear number, Tdate date);

Oracle in the database through the corresponding algorithm conversion for data storage, this paper briefly introduces the number of Oracle digital storage and conversion. This is to answer question number No. 2119 on the message board. we can use

This paper briefly analyzes the method of PHP connecting to Oracle database. Share to everyone for your reference, specific as follows: PHP provides two sets of functions that are connected to Oracle, namely the Ora_ and OCI functions. Where the

Comparison of some simple commands for Oracle and MySQL 1) sql> Select To_char (sysdate, ' Yyyy-mm-dd ') from dual; Sql> Select To_char (sysdate, ' Hh24-mi-ss ') from dual; Mysql> Select Date_format (now (), '%y-%m-%d '); Mysql> Select Time_format

---Friendship tips, more content, you can choose from the top left of the + Directory selection section to facilitate reading. Experimental thinking:--Experimental related trace file: http://download.csdn.net/detail/q947817003/6646723 1. Database

LOB large Object processing: A database field primarily used to store large amounts of data, which can store up to 4G of unstructured data. Mainly introduces the storage of character type and binary file type LOB data, separately describes the

I've often seen people ask this question, I've set up multiple indexes on the same table, why does Oracle choose one at a time and not use multiple indexes at the same time? Generally speaking, the common access to the same table more than two

Relative to physical standby, the management of logical standby is a little more complicated. This is the difference between managing a half database and managing two of databases (assuming that the data guard environment is a master standby

Transferred from blueskys567 original Oracle database backup and recovery of three ways , 2006-10.There are deletions.The Oracle database has three standard backup methods, namely Export/import (exp/imp), hot and cold backup .Exporting a spare is a

When we need to view database information, we prefer to view it through the client, which is not only easy to operate, but also more accurate to view. So the need to remotely connect to the database needs to modify those configurations locally? The

The last two days the production database has been reported ORA-24756 error, check the MoS document, see a similar, said is a bug (bug 19201866-reco reports ORA-24756 repeatedly into trace file ( Document ID 19201866.8), but the 11.2.0.4 on HP-UX

OracleData DictionaryThe Oracle data dictionary is where the data is stored, and its purpose is to describe the data. Data dictionaries can be divided into static and dynamic.static Data dictionaryA static data dictionary: the User Access data

There is already a openjdk in the system, the default JDK is it, not the Oracle JDK, do the following to set the Oracle JDK as the default!First, let's say we've installed and configured the Oracle JDK, but the "java-version" display in the shell is