Oracle

A tablespace can belong to only one database. Each database must have at least one control file (it is recommended that three files exist on different disks) Each database must have at least one tablespace (system tablespace) Each database must

I have been using Oracle for a long time. Today I have been studying its rownum. Rownum is the number of rows returned from the query (inserted to the database) in sequence by the Oracle system. It cannot be prefixed with any table name. This pseudo

Does hibernate support database-specific functions, such as Oracle connect by and substr? Can I write functions by myself? The answer is yes!Recently, a project was developed using STRUTS + hibernate, and encountered the problem of using Oracle

Oracle's system is too huge. For Beginners, it is inevitable that they will not start to feel like they want to learn anything, and the results will not be good. So share their learning experience, we hope that the beginners will have a general

Batch Processing (BAT file) automatically starts/closes the Oracle service Determining the Oracle service status If the service is in the starting status, the service is closed; If the service is closed, start the service. @ Echo off for/F

I. Implementation using SQL decode and PL/SQL Functions1. Column and column conversion with fixed columnsFor example Student subject grade --------------------------- student1 language 80student1 mathematics 70student1 English 60student2 language

Space Management your location: itpub personal space» Oracle learning path» logs can happen in the world, that is, nothing will happen. From: http://space.itpub.net /? Uid-693532-action-viewspace-itemid-716180 I. Database Name 1. db_name The

select * from ylfwzb.doubt_info a where a.dxlx = '2' and a.dxid = '90990' and a.gzid = '1000000000000001' and a.jbfl= nvl('',a.jbfl); 16 select * from ylfwzb.doubt_info a where a.dxlx = '2' and a.dxid = '90990' and a.gzid = '100000000000

Basic knowledge of Oracle Table space and schema) Objects in the same solution can be stored in different tablespaces. The same tablespace can store objects in different solutions. Ø each tablespace is composed of one or more data files. The total

The database is migrated today from MySQL to Oracle, but MySQL has a user table named user, while the user is an oracleA migration error is reported for a table under the sys account, but this table is displayed in Oracle. When you drop table user,

The following error is returned when installing ORACLE: Error in invoking target 'client _ sharedlib'   Error in invoking target 'client _ sharedlib 'of makefile'/home/Oracle/product/10.2.0/db_1/Network/lib/ins_net_client.mk '.   Answer1:   1. Did

 Can views in Oracle be updated?If I make such a survey on the internet, I think many netizens and friends will answer this question without thinking about it. No, the view is a logical record, not a physical record, in addition, many of my friends

Create Table table name as (subquery) Example: copy the EMP table in Scott, the default database installed by El. Create Table myemp as (select * from EMP ); In this example, the table structure and table content are copied together. Ii. Copy

SQL tuning is indeed worth a lot of in-depth work, and SQL tuning is also a very difficult task. I would like to share a good article on the Internet to thank you! [Oracle uses the choose optimizer by default. To avoid unnecessary full table scan,

One day in July, I attended the Oracle-Bea conference. The following is a summary of the content related to our company: 1. The overall product strategy of oracle after the acquisition of Bea After Oracle acquired Bea, its products were divided into

A lot of databases have been learned for a long time, but instances (routines) and databases are often confused. This may be the sequent of college education. First of all, what is the database? Databases are used to store data for a long time, and

Set Oracle database to archive mode and non-archive Mode 1. Set Oracle database to archive Mode1) SQL> shutdown normal/immediate;2) SQL> startup mount;3) SQL> alter database archivelog;4) SQL> alter database open;5) archive log list; Note: show

1. Single Instance create multi-database: Reference http://wenku.baidu.com/view/34ef2d390912a21614792997.html 2. command: Start listener LSNRCTL start Su-Oracle A. Start the Oracle SystemOracle> svrmgrlSvrmgr> connect internalSvrmgr> startup #

Restoration of Stored Procedure   When there are too many other users, there are too many other users, too many other users※※Restore name: the flashback feature of oracle -- restore the Stored Procedure ※※Restore Description: restores the stored

This document describes how to create a filebased-Repository cluster. For databased-Repository-based clusters, I will go into more details later. For large-scale enterprise applications, it is unrealistic to have no clusters. Considering the