Oracle

The following articles mainly introduce the recommended solutions for Oracle SQL optimization rules. If you are a beginner in the practical application of Oracle SQL optimization rules, you can use the following articles to better understand the

Oracle optimizer has three types, namely, RULE based on rules), COST Based on COST) and CHOOSE selection. We all know that the Oracle optimizer with default settings can be configured through init. various declarations of the OPTIMIZER_MODE

In the previous examples, we have some knowledge about it and tried some commands related to Oracle actual RMAN backup. However, in the actual operating environment, it is impossible to require DBAs to execute a command and a command to repeat the

Today we will mainly introduce how to optimize the database to greatly improve the performance of Oracle. Below we will introduce several simple steps to greatly improve the performance of Oracle, the image of Walmart is like the three axes of

The following articles mainly introduce Oracle installation, configuration, and SQL * Plus operation steps. I saw Oracle installation, configuration, and SQL * Plus operation steps on the relevant website two days ago, I think it's good. I just want

The following article describes how to log on to SQL * Plus as a DBA at Oracle10g. I saw several related articles on the internet two days ago, to learn how to install the actual operation steps on Windows XP Pro, you can change the path of the

If you want to improve the execution efficiency of SQL operations in Oracle, you must first consider optimizing the actual application business logic, in addition, Oracle provides practical application methods at the technical level. The following

Using Oracle function indexes is undoubtedly an effective way to improve query efficiency. The following describes how to use Oracle function indexes in detail. When talking about any operations on columns, full table scan may occur, for example:

Guidance:With the popularization of computers and the development of networks,DatabaseIt is no longer just a topic dedicated to programmers, but also familiar to many people,Data securityIt is no longer an old growth talk, nor is it a box of

I have previously introducedExplain Oracle Database Administrator's weekly responsibilities,Explain the daily task responsibilities of the Oracle Database AdministratorNext, we will introduce the monthly responsibilities and daily management of

InLinuxEnvironmentInstall oracle 10gIt is a daunting task, far more complex than installing the linux operating system. If oracle 10 Gb can be successfully installed, some linux technologies will be mastered at the same time. This article describes

Oracle DatabaseOfArchitectureIt includes four aspects: the physical structure, logical structure, memory structure and process of the database. Oracle Database is a highly functional relational database management system. It is the preferred

Oracle DatabaseProgramSecurityThe performance objective is generally divided into two categories: one class that all users can execute, and the other class that only DBA can execute. In Unix, the configuration file set for the group is/etc/group.

This article introducesSQL migrationThe second part: create a data file library Migration Repository ). 1. Connect to Oracle In the connection window on the left of the program, click the plus sign to add oneOracle DatabaseFor example: After the

This article mainly introducesOracle 10g isqlplusUseDBA accountNext, we will introduce them one by one. 1. vi. bash_profile Add Environment Variables export JAVA_HOME=$ORACLE_HOME/jdk  Save and exit. source .bash_profile  2. Switch

The knowledge about Oracle database implementation plans is what we will introduce in this article. We first introduce the concept of implementation plans, and then give examples of two implementation plans, finally, we introduced the form of the

Recently, temporary tables in Oracle need to be used for work reasons. It is found that there are still many differences between Oracle temporary tables and SQL-Server temporary tables. In order to thoroughly understand the performance of the

The following is a summary of Oracle locking policies:· Oracle only adds row-level locks to data when it is modified. Under normal circumstances, it will not be upgraded to block-level locks or table-level locks.· Oracle will never lock data if it

What is the difference between number and BINARY_DOUBLE in oracle?The main advantage is: it is more efficient than number, faster, and takes less space, but the version compatibility is poor.Numeric numeric typeNUMBER: this is a real decimal data

Oracle 64-bit PL/SQL connection error Make sure you have the 32 B... oracle OraDb11g_home 64-bit under Windows 64-bit server. PLSQL Developer has the following problems: 1. The Database drop-down box is blank. 2. Enter the user name, password, and