Oracle

My system is win7 32-bit flagship Chinese version, and the database is oracle10g.Http://download.oracle.com/otn/nt/oracle10g/10201/10201_database_win32.zip 10gAn error message is displayed when you directly install Oracle10g in win7, resulting in a

  This method is applicable when the user password expires, the account is locked, and the user password cannot be modified. 1. Retrieve expired user information Select username, account_status, password, profile from dba_users where username =

When remotely connecting to the database, the following error message is reported: ORA-01031: insufficient privileges An error occurred while trying to grant sysdba to sys. SQL> grant sysdba to sys; Grant sysdba to sys * ERROR at line 1: ORA-0

To write an SQL statement today, You need to retrieve the maximum and minimum values of multiple field columns.The originally thought method is quite troublesome. We need to extract max (one), max (two), and max (three) respectively and put them in

Case 4: Oracle diagnosis using SQL _trace Problem description: many times, when we perform database operations, such as drop user and drop table, we often encounter such errors. ORA-00604: error occurred at recursive SQL level 1. This prompt is

The data exported from oracle9i is imported to oracle10g. After being called by the program, it is found to be garbled, I thought it was about the RHEL5 system character set. After several modifications, I found that there was a problem with the

The concept of null in java: in java, null indicates that a class or variable is null and does not represent any object or instance. You can assign null to a reference type variable, however, null cannot be assigned to basic type variables. The

Data Export and Import Perform a logical backup to export data to A. dmp file.   Cmd Mode   C: \ Documents ents and Settings \ Administrator> exp   Export: Release 10.1.0.2.0-Production on Thu Aug 25 17:52:13 2011   Copyright (c) 1982,200 4, Oracle.

Related error promptOERR: ORA-12519 TNS: no appropriate service handler foundClient Connection intermittent failure, error ORA-12519Cause: the listener cocould not find any available service handlers that areAppropriate for the client

1. SQL * Plus does not care about the case sensitivity of SQL commands. SQL * Plus is case sensitive only when detecting text values;2. All values in the varchar2 and char columns are characters, including 11 and 2. The values stored in these

1. Data Dictionary 1.1 query the data dictionary. Dictionary ----- this dictionary contains all dictionary InformationSQL> select * from dict where instr (comments, 'index')> 0; ----- query all data dictionary names related to indexes.1.2 set the

Notes1. Data can be rolled back after being deleted in oracle because it places the original data in the undo tablespace,2. DML statements use undo tablespaces, DDL statements do not use undo, delete is a DML statement, truncate is a DDL statement,

Database (Oracle) O & M work content and common script commands 1. system resource status: -- Memory and CPU resources -- linux, solaris, aix vmstat 5 -- Note: 1) observe the Amount of idle memory and whether the amount of idle memory is stable. If

[Oracle] Online Segment Shrink refers to the fragments in the Online Segment space. It has the following features: Online, that is, during the segment compression process, DML is almost unaffected (DML will be blocked only a short period before the

[Oracle] SQL * Loader detailed tutorial (3)-control file is the most important file in SQL * Loader, it defines the location of the data file, the data format, and the behavior of configuring the data loading process. This section describes the

Optimization of IMPDP/EXPDP Import and Export speed data pump and exp/imp performance is greatly improved, the biggest impact is paralle. In this case, expdp/impdp = exp/imp + direct mode + paralle. Therefore, to increase the speed of data pump, you

Oracle tablespace expansion steps -- 0, with oracle user login database corresponding IP--1, with sysdba login database sqlplus/as sysdba -- 2, query the tablespace data file list select file_name from dba_data_files where tablespace_name =

Oracle implements field migration conditions between tables through the stored procedure: two tables: ITPUB_TEST1 field id, value ITPUB_TEST2 field id, funcid, action ITPUB_TEST2 funcid associated with id in itpub_test1. Task: migrate the action

Oracle Automatic Data Backup command oracle backup rhellinux Server # Application environment variable (hpunix) source/home/oracle /. profile # application environment variable (rhel linux) source/home/oracle /. bash_profile # Back up data

Union all is used to display the total items in a total project. Generally, a column is calculated and the total is displayed at the end of the column. The conventional method is to use union all to establish meaningless connections. Example: SQL