Oracle

ProgramConsiderations for migrating data from MySQL to Oracle When migrating a program from MySQL to Oracle, You need to note the following: 4. Processing long strings Oracle processing of long strings also has some special features. The

1. Automatically increasing data type Processing MySQL has a data type that increases automatically. When you insert a record, you do not need to operate on this field. The data value is automatically obtained. Oracle does not have an

  1 From: http://soft.chinabyte.com/database/430/11385430.shtml 2 from: http://qxh.javaeye.com/blog/609437   1. in Oracle, table space is the basic method for data management. All user objects must be stored in the table space, that is,

  As shown in the following figure, the tnslistener service stops again after it is started. It tries to delete the database, restart the computer, re-establish the database, and read the orcdata folder, which contains only the existing database,

From: http://www.cnblogs.com/xy6521/articles/1310177.html Oracle merge into usage details + instances Purpose: merge into solves the problem of using Table B and new table a data. If table A does not exist, the data in Table B is inserted

Transferred from: Http://database.51cto.com/art/200707/51422.htm [Bring togetherBlog of Oracle: instances and databases Instances are composed of the following: SGA, sharedpool, databasebuffercache, and redologbuffercache. A database consists

Today I read a book and wroteCodeBut it can be executed in seqplus, but cannot be executed in PLSQL. I checked it online. declare v_deptno number (2); v_dname varchar2 (10); begin begin select deptno into v_deptno from EMP where lower (ename) =

Application Layer: The application layer refers to the RAC database. This layer consists of several resources, each of which is a complete service composed of a process or a group of processes. The management and maintenance of this layer areThese

Guidance: Oracle 8i Database Server is a highly optimizable software product. Regular adjustments can optimize system performance and prevent data bottlenecks. By adjusting the database system, we can achieve optimal performance to meet user needs.

Oracle logically stores data in tablespaces, but actually stores data in data files.Table space and data filesTable space: A table space belongs to only one database at a time. It is composed of one or more data files. Logical storage units can be

1. view the environment 1 - Bash - 3.00 $ Sqlplus / Nolog 2 3 SQL * Plus: Release 10.2 . 0.2 . 0 - ProductionOn Mon Jan 21 19 : 22 : 40 2013 4 5 Copyright (c) 1982 , 2005 , Oracle. All Rights Reserved. 6 7 SQL > Conn / As

Recently, Oracle (Oracle) released the latest integrated middleware suite of 11 GB. Oracle President Charles Phillips made a special trip to Washington and held a two-hour demonstration with Thomas kurian, senior vice president of Integrated

To improve performance, we have made many attempts to address the methods or solutions provided by the Oracle database itself, including: Shared Server mode (MTS)Cluster Technology (clustering) RACPartitionParallel Processing (mainly parallel

I. Cold backup When the database is closed, all physical system files are copied, which is also called offline backup. Suitable for non-archive mode, where the database is in a consistent state Step 2 First, obtain all the physical file

Oracle RAC has both ha (high availiablity) and lb (loadbalance ). the foundation of its high availability is Failover (Failover ). it means that the failure of any node in the cluster will not affect the user's use, and the user connected to the

Text/NIU Haibin The annual Oracle Global Conference (Http://www.oracle.com/cn/openworld/index.htm) Come to Beijing at the end of the year, asCIO, Pay close attention to thisItThis is an exciting feast for me.ItManagement personnel are a good

Select * From dba_users -- View All Users Select * From user_all_tables -- query the current user tablespace Select * From user_source -- Query all functions and stored procedures Select * from V $ session -- view the current user connection

This article is transferred from: Http://dusong.blog.51cto.com/158065/139284 Oracle permission settings I. Permission classification: System permission: The system specifies the user's permission to use the database. (System permissions

1. View/table/between different networks involved/ 2. In fact, some projects should not establish multiple database links.   Select * From tab_sbzt @ dblink_fssj Create Table Scott. lc_sbzt as select * From tab_sbzt @ dblink_fssj; Select * From

Scenario Description:Control File Corruption (control file content unchanged) 1. Backup 1 SQL> alter database backup controlfile to trace as '/u01/admin/sun/udump/c.trc';2 3 Database altered.4 5 SQL> 2. Delete the backup file 1 -bash-3.00$ ls -l 2