Oracle

The last time I encountered a small problem, I accurately described it as a design defect. Let's first look at the problem, 3. For DEPT and EMP tables, query the results in the following format and arrange the results in descending order of

// Create table addmanage (Aid varchar2 (10) primary key, managename varchar2 (30), managepass varchar2 (100 )) // create auto-increment segment create sequence addmanage_sequencestart with 1 increment by 1 nomaxvaluecache 20 // create trigger

To avoid confusion, Oracle announced the change to the Java version naming method: Since JDK 5.0, Java released updates in two ways-limited UPDATE contains new features and non-security fixes, critical patch updates (CPUs) only security fixes are

Accidentally deleted the data files and log files of the database today. The following error was reported when the database was started: ORA-01157: cannot identify/lock data file 15-see dbwr trace fileORA-01110: Data File 15:

Statement 1:   Select rownum, .*From (select T. brand_name, wm_concat (T. pd_type), wm_concat (T. brand_id)From base_brand tGroup by T. brand_name) Statement 2: Select 'insert into base_brand_info (brand_id, brand_name, brand_name_cn) values

ArticleDirectory   For the rownum problem in Oracle, many documents do not support>, >=, =, between... and. The preceding symbols can only be used (,> =, =, .. and will prompt SQL syntax errors, but often cannot find a record,

I have studied some database interfaces before, such as OCI. Today I have studied occi specially. occi is a class library encapsulated on the basis of OCI for C ++ developers, it is organized using object-oriented methods, while OCI is a C language

1: List the names, department names, and salaries of all employees. Select a1.ename, a1.sal, a2.dname from EMP A1, DEPT A2 where a1.deptno = a2.deptno; 2: list all Department details and department count select a2.deptno, a2.dname, a2.loc, count (a1.

Desc table name. (You can view the detailed information of the table) Showuser; (view the current user) Modify Field name: alter table [Table name] rename column old field name to new field name; 1) Select B. ID, B. Title, B. ndate, A. manag, ename

1. in Oracle, select * From all_users is used to display all users, while the command for displaying all databases in MySQL is show databases. For my understanding, an oracle project should have a user and a tablespace corresponding to it, while a

Translation: fenng Date: 24--200-2004 Source: http://www.dbanotes.net Version: 1.01  Diagnose and resolve ORA-04031 errors When we try to allocate large blocks of continuous memory in the Shared Pool, Oracle first clears all the objects currently

CNET Technology Information Network August 18 international report sun 5 years ago to attract external programmers to invest in the establishment of the opensolaris program, apparently will end in Oracle. Oracle officially acquired sun in January

  1. Example of creating a tablespace:Create tablespace "sample"LoggingDatafile 'd:/Oracle/oradata/ora92/luntan. ora size 5 mReuse autoextendOn next 51200 K maxsize 3900 mExtent management local segment space management autoThe preceding statement

Testing ASP. when connecting to the Oracle database, the "Oracle client and networking components were not found. these components are supplied by Oracle Corporation and are part of the Oracle version 7.3.3 or later client software installation.

Installation instructions Oracle, mapviewer and geospatial data Download Oracle and mapviewerFrom www.oracle.com The database software: Oracle10g rel2 Standard Edition 10.2.0.10 for Microsoft Windows'A' ena-7 The Application Server

set echo onspool D:\oracle\app\admin\ocp11g\sctripts\cteatedb.logstartup nomount pfile"D:\oracle\app\admin\ocp11g\sctrpts\init.ora";create database "ocp11g"maxinstances 8maxloghistory 1maxlogfiles 16maxlogmembers 3maxdatafiles 100datafile 'D:\oracle\

1. Use v $ session and V $ locked_object to check who has locked the resource. Select t1.sid, t1.serial #, t1.username, t1.logon _ time From v $ session T1, V $ locked_object T2 Where t1.sid = t2.session _ id Order by t1.logon _ time   More: Select

Speaking of hwm, we should first briefly talk about Oracle's logical storage management. We know that Oracle has four granularities in logical storage: tablespace, segment, partition, and block. (1) block: it is the smallest storage unit. Currently,

Installing Oracle 10g with RHEL 5.3 and centos 5.3 is actually the same. There is nothing different. To the first Oracle Installation brother, also give yourself a diary. Or forget it later. You can find a solution at any time. Haha.   First.

Oracle study note _ trigger   Trigger The code block automatically executed when a specific event occurs. It is similar to a stored procedure, but users cannot directly call them. Function:1. Allow/restrict table modifications2. automatically