ORACLE实例分享:DB_LINK同步(Materialized View,Snapshot)
1.修改数据库名 1.查看oracle实例名 2.shutdown immediate 3.lsnrctl stop $ORACLE_SID#----------windows下关闭使用oracle服务 4.修改 /etc/oratab 的$ORACLE_SID#------------windows没有 5.修改用户环境变量.bashprofile #------------windows没有 6.linu
1.修改数据库名
1.查看oracle实例名
2.shutdown immediate
3.lsnrctl stop $ORACLE_SID#----------windows下关闭使用oracle服务
4.修改 /etc/oratab 的$ORACLE_SID#------------windows没有
5.修改用户环境变量.bashprofile #------------windows没有
6.linux下$ORACLE_HOME/dbs 修改有关$ORACLE_SID的文件名
windows下$ORACLE_HOME/database 修改有关$ORACLE_SID的文件名
7.重新生成密码文件,启动数据库
liunx:orapwd file=$ORACLE_HOME/dbs/orapw$ORACLE_SID password=oracle entries=5 force=y
windows:
在一个cmd运行oracle %ORACLE_ORCL%
在另一个cmd运行
set ORACLE_HOME=E:appcswggodproduct11.2.0dbhome_1database
set ORACLE_ORCL=orcl
orapwd file=%ORACLE_HOME%/ORACLE_HOME/dbs/orapw%ORACLE_SID% password=oracle entries=5 force=y
startup
#-------------------1.选择orcl实例
[oracle@h1 ~]$ sqlplus "/as SYSDBA"
SQL*Plus: Release 11.2.0.1.0 Production on Mon Nov 12 03:07:58 2012
Copyright (c) 1982, 2009, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL>
#-------------2.查看实例
SQL> select * from v$thread;
SQL> select instance_name from v$instance;
INSTANCE_NAME
----------------
orcl
#-----------------3.关机
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL>
#-------------4.关闭监听
[oracle@h1 ~]$ lsnrctl stop orcl
LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 12-NOV-2012 03:20:11
Copyright (c) 1991, 2009, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.5.130)(PORT=1522)))
The command completed successfully
#--------------5.修改/etc/oratab
[oracle@h1 ~]$ su root
Password:
[root@h1 oracle]# vi /etc/oratab
#------------orcl 修改为bitc
bitc:/app/oracle/product/11.2.0/dbhome_2:N
test:/app/oracle/product/11.2.0/dbhome_2:N
"/etc/oratab" 24L, 764C written
[root@h1 oracle]#
#-----------------6.修改.bash_profile并生效
[root@h1 oracle]# su oracle
[oracle@h1 ~]$ pwd
/home/oracle
[oracle@h1 ~]$ vi .bash_profile
# .bash_profile
# Get the aliases and functions
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi
# User specific environment and startup programs
PATH=$PATH:$HOME/bin
export PATH
export ORACLE_BASE=/app/oracle
export ORACLE_HOME=$ORACLE_BASE/product/11.2.0/dbhome_2
export ORACLE_SID=bitc
export PATH=$ORACLE_HOME/bin:.:$PATH
".bash_profile" 16L, 323C written
[oracle@h1 ~]$ . .bash_profile
[oracle@h1 ~]$ echo $ORACLE_SID
bitc
#---------------------7.修改配置文件名
[oracle@h1 ~]$ cd $ORACLE_HOME/dbs
[oracle@h1 dbs]$ ls -al
total 56
drwxr-xr-x. 2 oracle oinstall 4096 Nov 12 03:18 .
drwxr-xr-x. 76 oracle oinstall 4096 Nov 10 00:52 ..
-rw-rw----. 1 oracle oinstall 1544 Nov 10 00:40 hc_DBUA0.dat
-rw-rw----. 1 oracle oinstall 1544 Nov 12 03:18 hc_orcl.dat
-rw-rw----. 1 oracle oinstall 1544 Nov 12 03:03 hc_test.dat
-rw-r--r--. 1 oracle oinstall 2851 May 15 2009 init.ora
-rw-r-----. 1 oracle oinstall 1906 Nov 9 23:35 initorcl.ora
-rw-r-----. 1 oracle oinstall 24 Nov 3 07:13 lkORCL
-rw-r-----. 1 oracle oinstall 24 Nov 10 00:45 lkTEST
-rw-r-----. 1 oracle oinstall 1536 Nov 10 06:40 orapworcl
-rw-r-----. 1 oracle oinstall 1536 Nov 10 04:23 orapwtest
-rw-r-----. 1 oracle oinstall 2560 Nov 12 03:04 spfileorcl.ora
-rw-r-----. 1 oracle oinstall 2560 Nov 9 23:05 spfileorcl.ora.bak
-rw-r-----. 1 oracle oinstall 3584 Nov 12 03:03 spfiletest.ora
[oracle@h1 dbs]$ chmod 777 *
[oracle@h1 dbs]$ mv hc_orcl.dat hc_bitc.dat
[oracle@h1 dbs]$ mv lkORCL lkBITC
[oracle@h1 dbs]$ mv orapworcl orapwbitc
[oracle@h1 dbs]$ mv spfileorcl.ora spfilebitc.ora
[oracle@h1 dbs]$
[oracle@h1 dbs]$ ls
hc_bitc.dat init.ora lkTEST spfilebitc.ora
hc_DBUA0.dat initorcl.ora orapwbitc spfileorcl.ora.bak
hc_test.dat lkBITC orapwtest spfiletest.ora
#-----------------8.生成密码文件
[oracle@h1 dbs]$ orapwd file=$ORACLE_HOME/dbs/orapw$ORACLE_SID password=oracle entries=5 force=y
#---------------9.启动数据库
[oracle@h1 dbs]$ echo $ORACLE_SID
bitc
[oracle@h1 dbs]$ sqlplus "/as SYSDBA"
SQL*Plus: Release 11.2.0.1.0 Production on Mon Nov 12 03:35:11 2012
Copyright (c) 1982, 2009, Oracle. All rights reserved.
Connected to an idle instance.
SQL> startup
ORA-32004: obsolete or deprecated parameter(s) specified for RDBMS instance
ORACLE instance started.
Total System Global Area 501059584 bytes
Fixed Size 2214736 bytes
Variable Size 318768304 bytes
Database Buffers 176160768 bytes
Redo Buffers 3915776 bytes
Database mounted.
Database opened.
SQL> exit
2.数据库更名后,配置静态监听
[oracle@h1 dbs]$ netmgr
#-------------------1.配置监听文件
配置远程namespace:
验证:
#----------------2.修改静态监听参数

MySQLstringtypesimpactstorageandperformanceasfollows:1)CHARisfixed-length,alwaysusingthesamestoragespace,whichcanbefasterbutlessspace-efficient.2)VARCHARisvariable-length,morespace-efficientbutpotentiallyslower.3)TEXTisforlargetext,storedoutsiderows,

MySQLstringtypesincludeVARCHAR,TEXT,CHAR,ENUM,andSET.1)VARCHARisversatileforvariable-lengthstringsuptoaspecifiedlimit.2)TEXTisidealforlargetextstoragewithoutadefinedlength.3)CHARisfixed-length,suitableforconsistentdatalikecodes.4)ENUMenforcesdatainte

MySQLoffersvariousstringdatatypes:1)CHARforfixed-lengthstrings,2)VARCHARforvariable-lengthtext,3)BINARYandVARBINARYforbinarydata,4)BLOBandTEXTforlargedata,and5)ENUMandSETforcontrolledinput.Eachtypehasspecificusesandperformancecharacteristics,sochoose

TograntpermissionstonewMySQLusers,followthesesteps:1)AccessMySQLasauserwithsufficientprivileges,2)CreateanewuserwiththeCREATEUSERcommand,3)UsetheGRANTcommandtospecifypermissionslikeSELECT,INSERT,UPDATE,orALLPRIVILEGESonspecificdatabasesortables,and4)

ToaddusersinMySQLeffectivelyandsecurely,followthesesteps:1)UsetheCREATEUSERstatementtoaddanewuser,specifyingthehostandastrongpassword.2)GrantnecessaryprivilegesusingtheGRANTstatement,adheringtotheprincipleofleastprivilege.3)Implementsecuritymeasuresl

ToaddanewuserwithcomplexpermissionsinMySQL,followthesesteps:1)CreatetheuserwithCREATEUSER'newuser'@'localhost'IDENTIFIEDBY'password';.2)Grantreadaccesstoalltablesin'mydatabase'withGRANTSELECTONmydatabase.TO'newuser'@'localhost';.3)Grantwriteaccessto'

The string data types in MySQL include CHAR, VARCHAR, BINARY, VARBINARY, BLOB, and TEXT. The collations determine the comparison and sorting of strings. 1.CHAR is suitable for fixed-length strings, VARCHAR is suitable for variable-length strings. 2.BINARY and VARBINARY are used for binary data, and BLOB and TEXT are used for large object data. 3. Sorting rules such as utf8mb4_unicode_ci ignores upper and lower case and is suitable for user names; utf8mb4_bin is case sensitive and is suitable for fields that require precise comparison.

The best MySQLVARCHAR column length selection should be based on data analysis, consider future growth, evaluate performance impacts, and character set requirements. 1) Analyze the data to determine typical lengths; 2) Reserve future expansion space; 3) Pay attention to the impact of large lengths on performance; 4) Consider the impact of character sets on storage. Through these steps, the efficiency and scalability of the database can be optimized.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software
