Today, I started to understand the Oracle architecture and want to write down every part of the learning records. If something goes wrong, please point it out. Thank you. Oracle architecture diagram:
Today, I started to understand the Oracle architecture and want to write down every part of the learning records. If something goes wrong, please point it out. Thank
both Oracle and SQL Server follow the SQL-92 standard: http://owen.sj.ca.us/rkowen/howto/sql92F.html , but there are some differences, the difference is as follows:
Oracle table name, field name, stored procedure name, variable name cannot exceed 30 string lengths.
The top syntax is not supported in Oracle. Use W
Connecting to SQL Server2000 from Oracle 9i requires a transparent gateway through which we can manipulate other databases such as MS sqlserver, Sybase, infomix, etc, implement heterogeneous database services.
There is no transparent gateway in Oracle 8i and 9i comes with it, but it is not installed by default.
(1) install transparent gateway for Windows SQL Server
A well-designed, performance-capable database engine can easily serve thousands of users at the same time. And the "weak" database system with more users to access the system will greatly reduce its performance. In the worst case, it could even cause the system to crash.
Of course, parallel access is the most important problem in any database solution, and various kinds of database systems are proposed in order to solve the problem of parallel access. SQL Se
In the industry, Oracle databases are generally considered to be more secure than SQL Server databases. Next I will talk about the similarities and differences between the two databases in terms of security design. Mastering these contents plays an important role in designing and managing database security. I. role-to-user authorization many applications, including databases
In the industry,
"real Database" function, because it is only a basic system capable of database management and cannot store data. Just like building a house, you need a land first to build a house, but it is not a house. If the Oracle database process is successfully started, how can this problem be solved? As we can see above, if I need to operate the database server, we only need the following conditions:
Know TNS, that
Oracle 10g transparent gatewayAccessSQL Server 2000The configuration and listener startup and configuration are what we will introduce in this article. Next we will introduce them one by one.
I. Configure the environment
Oracle 10 Gb is installed on Windows 2003 server of 192.168.0.250:
Label:Datatypes translation between Oracle and SQL Server part 1:character, binary strings Datatypes translation is one of the most important things you need to consider when migrate your application from oneDatabase to the other. This is a article in the series so we talking about translate SQL query among different databases. This article would focused on conversion of those datatypes:character, binary st
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1.1.1 obtain the first N records
SQL Server: Select Top N * From xtable
ORACLE: Select * From xtable where rownum
DB2: Select * From xtable fetch first n rows only
1.1.2 obtain the current date
SQL Server: Select getdate ()
ORACLE: Select sysdate from dual
DB2: Select current timestamp from
Tags: des http io os ar using for SP filesFirst, install the configuration Oracle ClientTo access Orcale data, the Oracle client must be installed on the client machine that is accessed.Orcale has two forms of client:L Complete ClientThe Microsoft OLE DB provider that includes basic Oracle access to the server-side dat
Environment: Windows 2008 R2 + Oracle 10.2.0.3
After applying the latest bundle patch, the scan still reported a vulnerability Oracle database Server ' TNS Listener ' Remote Data Poisoning Vulnerability (cve-2012-1675)
·1. Determine the solution
2. Application Solutions
3. Verify Patch Status
4.reference
1. Determine the solution
The solution given by the
Label:Some time ago on the local XP system to test some of the integration of JavaBean form example, want to publish to the server segment to see if it works properly, at first think it will be the same as the local XP system, deploy to the relevant directory to do some configuration, but the actual process is very different from the imagination, Deploying to a server can be called twists. The following are
Differences between temporary tables in Oracle and temporary tables in SQL Server compared with the process of creating temporary tables in Oracle databases and the differences between temporary tables in SQL Server are the main content of this article, next, let's take a look at this part of content, hoping to help yo
Oracle and Microsoft are two major database products in the history of database development. This leaves little room for selection of databases, either Microsoft or Oracle. However, there is a big difference between them. When selecting databases, we have to pay attention to the three small differences between them. Understanding these differences can provide great guidance for database selection.
I. Differ
Welcome to the Oracle community forum and interact with 2 million technical staff to enter the Oracle database. This initialization parameter file is divided into two types: Text parameter files and server parameter files. Their content is the same, but the representation is different. The server parameter files are sa
The Oracle database server is the core of the entire system. Its performance directly affects the performance of the entire system. To adjust the performance of the Oracle database server, we mainly consider the following aspects:
1. Adjusting the operating system is suitable for the
In the Oracle RAC environment under VMWare, multi-path images of OCR or votingdisk are not enough for shared storage or need to be added to a new shared disk, we can add shared storage through the command line under VMWare, and then append these new disks to the virtual machines one by one. The following is a detailed description.
1. Add a virtual disk # Here we will add two shared disks for the virtual machine # One is to add an OCR image and the ot
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