TNS-01106: Listener using listener name LISTENER has already been started然后# /usr/lib/oracle/xe/app/oracle/product/10.
1.安装rpm包
nano /v.sh
将下面内容复制进去
#!/bin/bash
rpm -Uvh compat-db-4.2.52-5.1.i386.rpm
rpm -Uvh compat-libstdc++-33-3.2.3-61.i386.rpm
rpm -Uvh make-3.81-3.el5.i386.rpm
rpm -Uvh setarch-2.0-1.1.i386.rpm
rpm -Uvh libgomp-4.4.0-6.el5.i386.rpm
rpm -Uvh libXp-1.0.0-8.1.el5.i386.rpm
rpm -Uvh openmotif-2.3.1-2.el5_4.1.i386.rpm
rpm -Uvh kernel-headers-2.6.18-194.el5.i386.rpm
rpm -Uvh glibc-headers-2.5-49.i386.rpm
rpm -Uvh glibc-devel-2.5-49.i386.rpm
rpm -Uvh compat-gcc-34-3.4.6-4.i386.rpm
rpm -Uvh libstdc++-devel-4.1.2-48.el5.i386.rpm
rpm -Uvh gcc-4.1.2-48.el5.i386.rpm
rpm -Uvh gcc-c++-4.1.2-48.el5.i386.rpm
rpm -Uvh compat-gcc-34-c++-3.4.6-4.i386.rpm
存盘
bash /v.sh
rm -f /v.sh
2.调整内核参数
nano /etc/sysctl.conf
#将原来的# kernel.shmmax和kernel.shmall这两行参数屏蔽
kernel.shmall = 2097152
kernel.shmmax = 2147483648
kernel.shmmni = 4096
# semaphores: semmsl, semmns, semopm, semmni
kernel.sem = 250 32000 100 128
fs.file-max = 65536
net.ipv4.ip_local_port_range = 1024 65000
net.core.rmem_default=262144
net.core.rmem_max=262144
net.core.wmem_default=262144
net.core.wmem_max=262144
nano /etc/security/limits.conf --加入以下四行代码
* soft nproc 2047
* hard nproc 16384
* soft nofile 1024
* hard nofile 65536
nano /etc/pam.d/login --加入下面一行代码
session required /lib/security/pam_limits.so
3.增加用户及组
groupadd oinstall
groupadd dba
groupadd oper
useradd -g oinstall -G dba Oracle
passwd oracle
4.伪装操作系统版本,使安装Oracle时,,通过操作系统验证。
cp /etc/RedHat-release /etc/redhat-release.bak
nano /etc/redhat-release
替换为如下代码:
redhat-4

MySQLviewshavelimitations:1)Theydon'tsupportallSQLoperations,restrictingdatamanipulationthroughviewswithjoinsorsubqueries.2)Theycanimpactperformance,especiallywithcomplexqueriesorlargedatasets.3)Viewsdon'tstoredata,potentiallyleadingtooutdatedinforma

ProperusermanagementinMySQLiscrucialforenhancingsecurityandensuringefficientdatabaseoperation.1)UseCREATEUSERtoaddusers,specifyingconnectionsourcewith@'localhost'or@'%'.2)GrantspecificprivilegeswithGRANT,usingleastprivilegeprincipletominimizerisks.3)

MySQLdoesn'timposeahardlimitontriggers,butpracticalfactorsdeterminetheireffectiveuse:1)Serverconfigurationimpactstriggermanagement;2)Complextriggersincreasesystemload;3)Largertablesslowtriggerperformance;4)Highconcurrencycancausetriggercontention;5)M

Yes,it'ssafetostoreBLOBdatainMySQL,butconsiderthesefactors:1)StorageSpace:BLOBscanconsumesignificantspace,potentiallyincreasingcostsandslowingperformance.2)Performance:LargerrowsizesduetoBLOBsmayslowdownqueries.3)BackupandRecovery:Theseprocessescanbe

Adding MySQL users through the PHP web interface can use MySQLi extensions. The steps are as follows: 1. Connect to the MySQL database and use the MySQLi extension. 2. Create a user, use the CREATEUSER statement, and use the PASSWORD() function to encrypt the password. 3. Prevent SQL injection and use the mysqli_real_escape_string() function to process user input. 4. Assign permissions to new users and use the GRANT statement.

MySQL'sBLOBissuitableforstoringbinarydatawithinarelationaldatabase,whileNoSQLoptionslikeMongoDB,Redis,andCassandraofferflexible,scalablesolutionsforunstructureddata.BLOBissimplerbutcanslowdownperformancewithlargedata;NoSQLprovidesbetterscalabilityand

ToaddauserinMySQL,use:CREATEUSER'username'@'host'IDENTIFIEDBY'password';Here'showtodoitsecurely:1)Choosethehostcarefullytocontrolaccess.2)SetresourcelimitswithoptionslikeMAX_QUERIES_PER_HOUR.3)Usestrong,uniquepasswords.4)EnforceSSL/TLSconnectionswith

ToavoidcommonmistakeswithstringdatatypesinMySQL,understandstringtypenuances,choosetherighttype,andmanageencodingandcollationsettingseffectively.1)UseCHARforfixed-lengthstrings,VARCHARforvariable-length,andTEXT/BLOBforlargerdata.2)Setcorrectcharacters


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

Zend Studio 13.0.1
Powerful PHP integrated development environment

Atom editor mac version download
The most popular open source editor

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

SublimeText3 Mac version
God-level code editing software (SublimeText3)
