Oracle

1. Waiting for monitoring cases Select event, sum (decode (wait_time, 0, 0, 1) "Prev ",Sum (decode (wait_time, 0, 0) "curr", count (*) "tot"From v $ session_waitGroup by event order by 4; 2. rollback segment contention Select name, waits, gets,

Oracle's solution is to_date () and 24-hour notation and the display of MM minutes:I. Many JavaProgramLike me, the engineer may intuitively convert the format "yyyy-mm-dd hh: mm: SS", but it may cause an error in Oracle: "ora 01810 formatCodeAppears

Use Oracle Universal Installer (Oui) Installation Software You can use ORACLE universal Installer (Oui) to install your Oracle software. Oui is a GUI tool that allows you to view the Oracle software installed on your machine, install new

During data capturing, You must select and judge the SQL statement. Refer to the original script to find one of them.Decode (value, if1, then1, if2, then2,If3, then3 ,... else) the function can meet this requirement. An error is reported after it is

First look at the interfaces and functions of each package -- Create or obtain the handle information of the same name lockDbms_lock.allocate_unique (Lockname in varchar2, -- Name of the lock to be obtainedLockhandle out varchar2, -- returned Lock

I remember that I used powerdesigner to connect to the local Oracle database during my internship, But I installed the Oracle server on the local machine, therefore, the configuration of ODBC drivers and environment variables connecting to Oracle

1. asset type Asset type: capitalization, CIP, and Billing Capitalization: refers to the assets that need to be calculated for depreciation. CIP: it is an asset under construction and requires no depreciation. Depreciation starts after it is

Note: At the request of the general public, see the address for the original image:Http://blog.csdn.net/meteorlwj/article/details/6949096 Prerequisites:1) install Oracle ODI2) install Oracle Xe Database3) create database users odi/apps,

1 .. sqlplus operation 1. query all tables in a database -- "selec * From tab;2. Set pagesize 30;3. Set the number of lines displayed in each row to set linesize 300;4. Switch the user's conn user name [sys]/password [as sysdba/sys];5. view the

-"61" gift for everyone Currently, Tomcat is the most popular JSP environment. Tomcat5.0 contains a Web server. If it is a test, you do not need to integrate Tomcat with IIS or Apache. You can perform JSP testing on the web server that comes with

One login sqlplusSqlplus username/password @ database instance as login role;For example, if user SYS (password: 123) logs on to the database as sysdba, you can enter sqlplus sys/123 @ l as sysdba;This logon method directly exposes the password. If

About ExportPrincipleThe SQL plus report function is used to generate text files, but the generated text files are empty for analysis reasons (only press enter does not have any other). You can use a third-party method to generate standard text.A

In our projects, we may encounter this situation. The database server and the client are in different time zones. Therefore, we need to consider the synchronization of time when designing our system, that is, different clients in different time

22.1 Problem Description Maybe you can say that a Chinese character occupies 2 bytes, Which is certain? How to calculate the number of bytes of a string? 22.2 Solutions In Oracle, a character, especially Chinese, occupies several bytes. For example,

In the latest version of Oracle 10g R2, the most timely technology should be transparent data encryption technology (TDE ). This technology is included in Oracle Advanced Security Options. The cost per processor is USD 10,000, which is only

PL/SQL table (Oracle memory table) --- table () function usage = ================================ Author: zhouwf0726 (http://zhouwf0726.itpub.net) Posted: Category: Oracle Development Source: http://zhouwf0726.itpub.net/post/9689/195237 -------------

Generate the guid type in Oracle -- sys_guid () function   Oracle8i introduces sys_guid, which has many advantages over the traditional sequence used by Oracle administrators. A sequence generator simply creates a series of integers starting from a

Perform the following operations under the root user:$ Uname-Linux yndxjk 2.6.9-42. elsmp #1 SMP Wed Jul 12 23:27:17 EDT 2006 i686 i686 i386 GNU/Linux$ Grep memtotal/proc/meminfoMemtotal: 3115144 KB$ Grep swaptotal/proc/meminfoSwaptotal: 1044184 KB$

Importing and exporting Oracle Data imp/exp is equivalent to restoring and backing up ORACLE data. The exp command can export data from the remote database server to the local DMP file, and the IMP command can import the DMP file from the local to

The previous sections mainly focus on some features and management methods of Oracle software. Oracle is a large set of system software. It is about Oracle installation and deployment. I will not describe how to deploy configurations first, because