Oracle

11g warning log 1. obtain information about ADR by querying the v $ diag_info view. sys @ ora11g> select * from v $ diag_info; INST_ID name value ------- -------------------- metric 1 Diag Enabled TRUE 1 ADR Base/oracle/u01/app/oracle 1 ADR

Database archive mode: Create the table space testtbs and the data file testtbs. dbf. Close Database Delete the data file testtbs. dbf Start Database Tip: ORA-01157: unable to identify/lock data file 2-see DBWR trace file ORA-01110: data file 2

Some systems may have high requirements on the system's response to high data concurrency (for example, the flight ticket booking system). This article uses Oracle's lock table to solve this problem: The key code in Procedure is as follows: ---------

This forum article (CCID technical community) provides a detailed introduction to the usage of DBMS_SCHEDULER. For more information, see the following: DBMS_SCHEDULER is a new package in Oracle 10 Gb. Compared with the old version of dbms_job

Some practical statements in Oracle Developer 2000: Abort_query; stop query execution Add_group_column (record group id or name, group column Add a column to a Record group, record group id Name, column type, column width ); Add_group_row (record

As we all know, Oracle11g has long been the most important product line of Oracle, and Oracle11g components are also the key resource investment field of oracle. The Oracle11g is a milestone in the transformation from a relational database to a grid

Oracle, as a super large database, is widely used in financial, post and telecommunications, electric power, civil aviation, and other large data throughput. It is the main organization for extensive promotion of computer networks. As for the system

4. Operate instances 4.1 single and multi-columns support Chinese search Create table mytable1 (id number primary key, doc1 varchar2 (400), doc2 clob, doc3 clob );   Insert into mytable1 values (1. Today's weather is good. I want to go shopping.

In some cases, data in Oracle databases needs to be imported into MySQL. How can we import data conveniently and quickly? The MySQL Migration Toolkit in MySQL GUI Tools can be used easily. This tool also supports CLOB and BLOB data.The following

Summary of Oracle constraints when we first got started with constraints, we may be confused. For example, a table may have several different constraints, and the same column in a table may have several different constraints, there are also

With regard to expdp, the permissions required for impdp operations have always been misunderstood by DATAPUMP_EXP_FULL_DATABASE and DATAPUMP_IMP_FULL_DATABASE. I thought this permission is required only when the full database is imported. I only

In ibatis, the like fuzzy query method is invalid: SQL code select * from table1 where name like '% # name # %'  Two Effective Methods: 1. Use $ instead #. This method removes the type check and uses the string connection, but there may be SQL

[Oracle] placing tables and indexes in different tablespaces does not distinguish whether tables or indexes are stored in tablespaces. When the data volume is small, you can put the table and index in the same tablespace. However, as the data size

Oracle random Result Test Create table t as select * from all_objects where rownum  

Create an external table example The following SQL statements create an external table named admin_ext_employees in the hr schema and load data from the external table into The hr. employees table. CONNECT / AS SYSDBA;-- Set up directories and

[Oracle]-[architecture]-[DBWR]-DBWR Process-related understanding of DBWR some understanding of DBWR first from the name, DBWR is the full name of Database Writer Process, DBWn is a type of Oracle background process, which is also called DBWn in

ORACLE initialization parameter: AUDIT_TRAIL initialization parameter AUDIT_TRAIL is used to control database audit. The default value is none. Parameter type: String default value: none allow dynamic modification: no basic parameter: No Syntax:

ORA-600 [kcratr_scan_lastbwr] logical bad block solution database version: 11.2.0.3 problem phenomenon: Today when starting a test database, found that db cannot open, the ERROR is as follows: ERROR at line 1: ORA-00600: internal error code,

Incomplete Oracle recovery Incomplete SQL code recovery refers to the restoration to a certain point in time. operations after this point in scn will all disappear recover datafile until scn xxxx; recover database until scn xxxx; recover database

One switchover of 10g mongourad Query the status of the master database: SQL> select switchover_status from v $ database; the SWITCHOVER_STATUS--------------------SESSIONSACTIVE replaces the role of the master Database: SQL> alter database commit to