Oracle

1. Unlock the user Alter user Scott account unlock; 2. log out, disconnect, and switch the current user connection Quit Conn Scott/Tiger 3. user permission Query A. View All Users: Select * From dba_users; Select * From

The Oracle tutorial is: Oracle database security policy. With the popularization and improvement of computer network applications, Oracle database applications are becoming increasingly popular in various fields. It features excellent performance

I have encountered such a problem in a project. In SQL Server, Images cannot be displayed when the image type is migrated to the Oracle blob type. I have read an image data in SQL Server. As follows: 1. SQL Server Select datalength (D. Photo) from

Database optimization greatly improves Oracle PerformanceSeveral Simple Steps greatly improve Oracle performance-I optimized the database three axes.Database optimization is an eternal topic. Senior Oracle optimizer usually asks the person who

In my previous banking project, I received the task of writing an oracle stored procedure. I amProgramEmployee, his head only has some experience in calling stored procedures using the callable interface. I have read some documents for some time, it

From http://blog.chinaunix.net/space.php? Uid = 16981447 & Do = Blog & cuid = 430716 was simply formatted and a little original stuff was added. Oracle9i introduces the merge command. You can execute the inserts and updates operations on a table in

ArticleDirectory Basic syntax Examples Coalesce and nullif Functions Conclusion The difference between the expression and the as expression after the case and the end is the most obvious -- Oracle Select

Table creation: Create Table user_info (Id integer not null,Username varchar (30) not null,Password varchar (20) not null,Createdate date not null,Status integer not null,Constraint pk_user_info primary key (ID)); Create Table user_info_temp (Id

One way to log on to Oracle is to verify the login mode of the operating system, that is, the OS authentication login mode, which is also available in SQL Server.Some friends often use connect/As sysdba to log on, but do not know why sysdba

The previous examples demonstrate the performance improvement caused by the standard writing of paging query statements. Here, we will briefly describe when paging query statements cannot improve performance. The paging query statement can

Data synchronization between SQL Server and Oracle When it comes to synchronization, it actually relies on the "job" timed scheduling stored procedure to operate on

1. Start the case without loading the database You can start the instance without loading the database. This is generally done only when the database is created:Startup nomount 2. Start the case and load the database You can start the instance and

Use Oracle Database 10 GInternal ETL infrastructure Http://www.oracle.com/technology/global/cn/obe/10gr2_db_single/bidw/etl2/etl2_otn.htm -- Some basic concepts and types of CDC are introduced in Change Data Capture (1. This article mainly

Database Version: Oracle 10.2.0.5-64Number of nodes: 2Operating system version: centos 5.6-64 Awr report today finds gc buffer busy wait time Gc buffer busyThis wait event, also known as global cache buffer busy prior to Oracle 10g, specifies the

Introduction Recently I want to study LoadRunner to test Oracle performance, and then I started to try to install Oracle on Linux. I felt that this was not easy. I heard a friend say that he had to pay a lot of twists and turns during the

DBAs often encounter unlocking Oracle users in their daily work. This article describes how to unlock Oracle users using the command line, you can use several simple unlock statements to complete this task. The specific process is as follows: Scott

"…… A veteran will not follow the instructions at all, and he will make trade-offs, so he must concentrate on his work, even if he does not deliberately do this, there is a natural sense of harmony between his actions and machines. He does not need

The ORACLE tutorial is: remote automatic backup of Oracle data in the database. In large commercial applications, Remote Disaster Recovery and backup of data are very important and necessary. Based on my practical experience, I have designed a

The ORACLE tutorial is: Oracle Database Security Policy Analysis (1 ). Database security has always been a nightmare for database administrators. The loss of database data and the intrusion of illegal database users make the database administrators

1. INSERT (INSERT the record statement into the data table) Insert into Table Name (field name 1, field name 2 ,......) VALUES (value 1, value 2 ,......);Insert into Table Name (field name 1, field name 2 ,......) SELECT (field name 1, field name 2