Oracle

Use vs2008 C # To develop a database query on a 64-bit PlatformProgramTo connect to Oracle 8i, you must use Oracle. dataaccess. dll of version 2.102.4.0 or earlier. To run IIS in 64-Bit mode, you must also select a 64-bit DLL I encountered the

The company's new project uses Oracle database and entityframework. There is no suitable information on the Internet, so you cannot learn and practice it. First, use dbfirst mode. 1. Download the Oracle plug-in odac that supports ado.net. Odac 11.

In Oracle, for the same query statement, it is sometimes completed quickly, but sometimes very slow, but the table structure is completely consistent, and the data in the table is also completely consistent. What is the specific reason, let's start

This article describes various operations on date and time in Oracle databases, including: date and Time Interval operations, date-to-character operations, character-to-date operations, use of trunk/ROUND functions, and millisecond-level data types.

2.4.1 Process StructureThere are two types of processes in the Oracle 9i network environment.1. User ProcessA user process is a program running on the client memory, such as the SQL Plus and enterprise controller run on the client. The user process

1. Call includes Out/in outStored Procedure of type parameters Stored Procedure: Create or replace procedure "SITE_EDITSITEDATAEXIST" (Id _ number, Name _ varchar2, HttpRoot _ varchar2, Flag out integer) // out only provides the output function. in

In oracle, sequence is the so-called serial number. It will be automatically added each time it is obtained. Where the serial number is sorted. 1. create sequenceFirst, you must have the create sequence or create any sequence permission,Create

I read a post today and it was reposted in a few places, but the performance is not very good. Because I cannot comment, I wrote the optimization idea here. 1. determine the demand: the employees are grouped by department, and the employees are

The latest version of oracle isOracle 11g download,Share "Oracle 11g" (not 11i), "Oracle 10g", and "Oracle 9i ".All versions of Oracle are free to download, and each software comes with a development license.Oracle 11g: Oracle Database 11g Release 1

This article introduces some basic concepts of ORACLE execution plans for learning and application. 1. Related Concepts The concept of Rowid: rowid is a pseudo column. Since it is a pseudo column, this column is not user-defined, but added by the

You can create a composite index in Oracle, that is, an index that contains two or more columns at the same time. Oracle has the following features in the use of composite indexes: 1. When a rule-based optimizer (RBO) is used, the index is used only

  This article will explain to you the Latch mechanism of Oracle. Latch is a plug-in for Kingsoft translation, locking and a specialized term called Latch. When I started to contact Oracle, I didn't quite understand why I didn't write Lock, aren't

PrerequisitesShared memory: shared memory segment:A memory area can be read by different processes. Oracle uses it to form sga. Oracle uses the following three methods to create an sga zone:1. Use a single shared memory segment.2. Use multiple

Oracle stores data through corresponding algorithm conversion in the database. This article briefly introduces the Number-type data storage and conversion of Oracle. This article aims to answer question No. 2119 on the message board. We can use the

Oracle9i starts to provide a flashback query so that consistent data at a time point in the past can be found as needed, which is implemented through Undo. This function has a lot of limitations, that is, the undo of related transactions cannot be

9i provides an online table redefinition method that allows you to modify the table structure without affecting the DML of the original table. In fact, the online redefinition table is not completely online redefinition. The original and

  Oracle default port list and modification method Address: http://blog.csdn.net/frjcy/archive/2006/04/25/676893.aspx View IANA default port: http://www.iana.org/assignments/port-numbersService port product change measures Oracle HTTP Server

1. C: \> sqlplus "sys/test123 as sysdba" // log on as an administrator 2. If no instance exists, you can use this connection. C: \> sqlplus/nolog ThenLogin SQL> connect sys/test1234 as sysdba // sys must be logged in as sysdba

Some features of the new system need to be connected to data of another company, while our own system uses the SQL Server R2 database, and the other database is Oracle 11 GB. It involves connecting to the Oracle database in the ASP. NET program.

As we all know, roles are a set of permissions, and Oracle has some built-in roles for easy management. Speak nonsense and start with the question. I. Several Simple oracle roles 1. CONNECT 2. RESOURCE 2. Analyze built-in roles one by one 1. CONNECT