Oracle

The push_pred application of hints optimized an SQL statement in the project. At that time, it was reduced from more than 40 seconds to 2 seconds. I felt very fulfilled. Now I 've looked at it again, I think there is still room for optimization. The

Greenplum management mode is the same as oracle schema. It is used to logically organize the storage containers of database objects. Different schemas do not share namespaces. Schema public is created by default after the database is created. each

How to uninstall oracle step by step in Windows nt: 1. Start-> set-> Control Panel-> Administrative Tools-> stop all Oracle services. 2. Start-> Program-> Oracle-OraHome9i-> Oracle Installation Products-> Universal Installer uninstalls all Oracle

Oracle daily check script [plain] #! /Bin/bash sqlplus-s/as sysdba Spool/tmp/oraclecheck/dbcheck. log set echo off whenever sqlerror continue; set lines 500 set pages 500 prompt ################################# ########### prompt Database

Add Redo log Member/Group 1. ADD redo log groups a: alter database add logfile ('/oracle/dbs/log1c. rdo ','/oracle/dbs/log2c. rdo ') SIZE 100 M; B: ALTER DATABASE ADD LOGFILE GROUP 10 ('/oracle/dbs/log1c. rdo ','/oracle/dbs/log2c. rdo ') SIZE 100 m

[ORACLE basics 2] I am not familiar with cross-server table data synchronization in oracle, but I am now scheduled to perform two database tables for Synchronous replication. I don't understand it. I can only start to study and create it. If you

Errors related to exp export: Some problems encountered when using exp to export data from the database are recorded. [SQL] $ exp system/oracle owner = system file =/oracle/full. dmp statistics = estimate Export: Release 10.2.0.5.0-Production on Sun

Change the location of data files in multiple tablespaces 1. the database is in the mounted state: Optionally, the database does not have to be closed, but the datafiles (or tempfiles) must be offline. 2. use the OS command copy and rename the

Oracle batch submit DML SQL code/* refer to section 8.5 of TOM programming art submitted in a loop 1. batch operation does not increase the execution speed, and the execution efficiency is less than that of a single DML statement. 2. Batch insertion

Oracle pl/SQL programming simple data type definition operation begin dbms_output.put_line ('Hello World'); // dbms_output = system. out put_line = println end;/set serveroutput on; set to print the output to the command line. By default, v_name

[Oracle problem set 1] MEMORY_TARGET not supported on this system execution statement: Start Oracle Database (startup) error: ORA-00845: MEMORY_TARGET not supported on this system error cause: because the size of SGA exceeds the size of the

Sysbench test oracle Installation Method 32-bit export CC = ccexport CFLAGS = "-I/u01/app/oracle/product/11.2.0/db_1/rdbms/public" export CXXFLAGS = "$ CFLAGS" export ORACLE_HOME =/u01/app/oracle/product/11.2.0/db_1export LD_LIBRARY_PATH = $

Oracle odbc ConfigurationIf oracle odbc is installed in Windows 64-bit, you cannot use "Administrative Tools"> "Data Source (OBDC)" in the control panel to install the data source.In "run", enter C: \ Windows \ SysWOW64 \ odbcad32.exe to install the

The ORA-00979 is not an explanation of the group by expression error ORA-00979 is not a group by expression. "This error, like the other wrong ORA-00937 I introduced earlier, makes a lot of oracle beginners love to commit. When I introduced the use

Table A modifies table B's data function. Today, the calculation data error is caused by the problem of the original project method. Now, you need to change the previous data. The table to be changed is as follows: table A (trainee training info

Example code [SQL] create smallfile tablespace "newts" datafile 'd: \ app \ oracle \ oradata \ orcl11g \ newts01.dbf 'size 100 m autoextend on next 10 m maxsize 200 m logging/* all operations on segments in the tablespace will generate redo content,

Oracle hexadecimal conversion rowid to 36 hexadecimal string FUNCTION FUN_ROWID_TO_36HEX (p_ID in VARCHAR2) return varchar2 is V_OBJECT_ID INTEGER; V_O_S VARCHAR2 (7); V_FILE_ID INTEGER; V_F_S VARCHAR2 (4 ); v_BLOCK_ID INTEGER; V_ B _S VARCHAR2 (6);

The ORA-01187 ORA-01110 error was encountered during data import, the most recent data import (IMP), because the database was restored using hot standby and the recovery was successful, because the database can be opened successfully, what are the

New Feature of Oracle 11g R2: Deferred Segment Generation when you install an application that contains thousands of tables and indexes, if each table and index are initially allocated a 10 MB initial extent. You will soon realize that if each

You can use datapump to export and import Synonyms (export and import synonym using datapump) to back up synonyms in multiple ways. For example, you can directly generate a synonym creation script using a script, you can also use