Oracle

Oracle Database Character Set taiwen warehouse receiving problem today encountered imported database field content is taiwen data, always show as question mark, copy and paste can show taiwen, insert with insert display question mark, baidu has a

Oracle command line to create a database sample script [SQL] set echo on spool D: \ oracle \ app \ admin \ ocp11g \ sctripts \ cteatedb. log startup nomount pfile "D: \ oracle \ app \ admin \ ocp11g \ sctrpts \ init. ora "; create database" ocp11g

New Feature of Oracle11g: a new feature is provided in the RMAN script using the replace variable Oracle11g, which is used in the RMAN script. Today, I did a small experiment on the server and tried this feature. Although some errors have been made,

A few days ago, my colleague sent an SQL statement because the SQL statements caused by inconsistent data types did not go through the index. It was said that the SQL statement was executed slowly during the update operation. I checked that the data

[Oracle @ localhost admin] $ pwd/Home/oracle/product/10.2.0/db_1/rdbms/admin[Oracle @ localhost admin] $ sqlplus sys/lubinsu as sysdbaSQL * Plus: Release 10.2.0.1.0-Production on Sun May 19 15:12:52 2013Copyright (c) 1982,200 5, Oracle. All rights

Physical Volume uard dummies practice I. Environment 1. Virtual Machine connection method for Environment preparation: Pay attention to virtual machine net connection method, and click edit to view the Virtual Machine network segment operating

The background of database migration to the same machine is explained in detail. to free up the disk space occupied by the principle database/hypdata, the Information Department adds another disk to it, the directory is/hypdata47. We need to port

When the status of the lsnrctl command is used for dynamic and static listeners, the following return values are often displayed: [plain] Service "elvis" has 2 instance (s ). instance "elvis", statusUNKNOWN, has 1 handler (s) for this service...

The internal mechanism of oracle log buffer and common wait events are redone by PGA, and then the server processes of each session copy the redo records to the log buffer of SGA, then, the LGWR process refreshes the three latch involved in the redo

Oracle lock data solution today, we accidentally discovered that a record in the oracle database could not be edited or deleted, and thought it was a program reason that we had not found the problem for a long time. Then we checked it online, the

Recovery from corrupted mysql replication directly copies the wiki of the company I edited. Relay log resume uption example: You can get error info after SHOW SLAVE STATUS; Last_Error: Relay log read failure: cocould not parse relay log event entry.

What is the importance of application dba? 1. it is very important to review the SQL statements written by developers and correct SQL statements with performance problems. compile complex business logic SQL statements. Because the SQL statements

Confusing Oracle recursive query (start with) when writing code, you need to understand the transfer relationship between Oracle's role. If role A exists, you can grant A to B, grant A to B and grant B to C. then I want to know which role has the

The control file of oracle is a small binary file that is part of the oracle database. It is used to record the status and physical structure of the database. Each database must have at least one control file, but it is strongly recommended that

PLSQL data import and import data (1) log on to plsql as an administrator; (2) create a command window (3) create a user, set an account, and create a password statement: create user usernameidentified by password; (4) create a tablespace. Create

Traditional path Export VS direct path Export (oracle exp direct = y) Oracle traditional Export and Import are retained to 11 GB, in addition, 9i and 10g are many enterprises that still use Export and Import methods for backup and recovery. Since

DBAs should pay attention to the operating DBA's dependency on OS in Linux, which is no less than DB, especially for Oracle DBAs, and the increasing feelings of DB and OS, and the high coupling between them. for example, Oracle, fault diagnosis,

(1) SQL compilation and debuggingThe latest version of SI Object Browser V12 provides a GUI for all Chinese characters.First, we use the "graphic compiler" function to create such an SQL statement.Example: [select Department table. department Code,

Oracle string Split 1. CREATE an array SQL code create or replace type T_RET_TABLE is table of VARCHAR2 (512) 2. CREATE a string segmentation FUNCTION SQL code CREATE OR REPLACE FUNCTION F_SPLIT_STRING (AS_STR VARCHAR2, AS_SPLIT VARCHAR2) RETURN

Start with... in Oracle... connect by recursion in Oracle start... connect by prior clause usage connect by is used in structured queries. Its basic syntax is: select... from tablename start with condition 1 connect by condition 2 where Condition 3;