公司环境RedHat AS5 安装Oracle 10g的文档
patch for Oracle10gR2
先执行patch1，，再执行patch2
rpm -Uvh compat-libstdc++-3.2-1.i386.rpm
-rw-r--r-- 1 root root 3016394 Aug 20 14:03 binutils-2.17.50.0.6-6.0.1.el5.i386.rpm
-rw-r--r-- 1 root root 410476 Aug 20 13:52 compat-binutils215-2.15.92.0.2-24.i386.rpm
-rw-r--r-- 1 root root 4256 Aug 20 13:55 compat-libcwait-2.1-1.i386.rpm
-rw-r--r-- 1 root root 3552095 Aug 20 14:08 compat-libstdc++-3.2-1.i386.rpm
-rw-r--r-- 1 root root 88787 Aug 20 14:03 compat-libstdc++-egcs-1.1.2-1.i386.rpm
-rw-r--r-- 1 root root 3840 Aug 20 14:04 compat-oracle-el5-1.0-5.i386.rpm
-rw-r--r-- 1 root root 15427327 Aug 20 16:15 fonts-chinese-3.02-12.el5.noarch.rpm
-rw-r--r-- 1 root root 1079629 Aug 20 14:08 openmotif21-2.1.30-11.EL5.i386.rpm
-rw-r--r-- 1 root root 122314 Aug 20 14:09 openmotif21-debuginfo-2.1.30-11.EL5.i386.rpm
-rw-r--r-- 1 root root 10662 Aug 20 14:06 xorg-x11-libs-compat-6.8.2-1.EL.33.0.1.i386.rpm
[root@ patches]# rpm -Uvh compat-libstdc++-3.2-1.i386.rpm
error: Failed dependencies:
libstdc++ = 4.1.2-42.el5 is needed by (installed) libstdc++-devel-4.1.2-42.el5.i386
libstdc++ = 4.1.2-42.el5 is needed by (installed) gcc-c++-4.1.2-42.el5.i386
libstdc++.so.6 is needed by (installed) libusb-0.1.12-5.1.i386
libstdc++.so.6 is needed by (installed) db4-4.3.29-9.fc6.i386
libstdc++.so.6 is needed by (installed) libtiff-3.8.2-7.el5.i386
libstdc++.so.6 is needed by (installed) beecrypt-4.1.2-10.1.1.i386
libstdc++.so.6 is needed by (installed) flac-1.1.2-28.el5_0.1.i386
libstdc++.so.6 is needed by (installed) pcre-6.6-2.el5_1.7.i386
libstdc++.so.6 is needed by (installed) aspell-0.60.3-7.1.i386
libstdc++.so.6 is needed by (installed) groff-1.18.1.1-11.1.i386
libstdc++.so.6 is needed by (installed) festival-1.95-5.2.1.i386
libstdc++.so.6 is needed by (installed) iptstate-1.4-1.1.2.2.i386
libstdc++.so.6 is needed by (installed) ttmkfdir-3.0.9-23.el5.i386
libstdc++.so.6 is needed by (installed) dvd+rw-tools-7.0-0.el5.3.i386
libstdc++.so.6 is needed by (installed) libmusicbrainz-2.1.1-4.1.i386
libstdc++.so.6 is needed by (installed) cdrdao-1.2.1-2.i386
libstdc++.so.6 is needed by (installed) mesa-libGLU-6.5.1-7.5.el5.i386
libstdc++.so.6 is needed by (installed) opensp-1.5.2-4.i386
libstdc++.so.6 is needed by (installed) openjade-1.3.2-27.i386
libstdc++.so.6 is needed by (installed) cups-1.2.4-11.18.el5.i386
libstdc++.so.6 is needed by (installed) RedHat-lsb-3.1-12.3.EL.i386
libstdc++.so.6 is needed by (installed) hpijs-1.6.7-4.1.el5_0.3.i386
libstdc++.so.6 is needed by (installed) poppler-0.5.4-4.4.el5_1.i386
libstdc++.so.6 is needed by (installed) lftp-3.5.1-2.fc6.i386
libstdc++.so.6 is needed by (installed) coolkey-1.1.0-6.el5.i386
libstdc++.so.6 is needed by (installed) gmp-4.1.4-10.el5.i386
libstdc++.so.6 is needed by (installed) libstdc++-devel-4.1.2-42.el5.i386
libstdc++.so.6 is needed by (installed) libicu-3.6-5.11.1.i386
libstdc++.so.6 is needed by (installed) boost-1.33.1-10.el5.i386
libstdc++.so.6 is needed by (installed) swig-1.3.29-2.el5.i386
libstdc++.so.6 is needed by (installed) doxygen-1.4.7-1.1.i386
libstdc++.so.6 is needed by (installed) systemtap-0.6.2-1.el5.i386
libstdc++.so.6 is needed by (installed) oprofile-0.9.3-16.el5.i386
libstdc++.so.6 is needed by (installed) frysk-0.0.1.2008.03.19.rh1-1.el5.i686
libstdc++.so.6 is needed by (installed) xulrunner-1.9-0.beta5.6.el5.i386
libstdc++.so.6 is needed by (installed) ghostscript-8.15.2-9.1.el5_1.1.i386
libstdc++.so.6 is needed by (installed) yelp-2.16.0-18.el5.i386
libstdc++.so.6 is needed by (installed) firefox-3.0-0.beta5.6.el5.i386
libstdc++.so.6 is needed by (installed) evince-0.6.0-8.el5.i386
libstdc++.so.6 is needed by (installed) vnc-server-4.1.2-9.el5.i386
libstdc++.so.6 is needed by (installed) xulrunner-devel-1.9-0.beta5.6.el5.i386
libstdc++.so.6 is needed by (installed) sound-juicer-2.16.0-3.el5.i386
libstdc++.so.6 is needed by (installed) scim-libs-1.4.4-39.el5.i386
libstdc++.so.6 is needed by (installed) scim-1.4.4-39.el5.i386
libstdc++.so.6 is needed by (installed) scim-tables-0.5.6-7.i386
libstdc++.so.6 is needed by (installed) scim-bridge-0.4.5-7.el5.i386
libstdc++.so.6 is needed by (installed) wvdial-1.54.0-5.2.2.1.i386
libstdc++.so.6 is needed by (installed) scim-pinyin-0.5.91-16.el5.i386
libstdc++.so.6 is needed by (installed) scim-chewing-0.3.1-11.el5.i386
libstdc++.so.6 is needed by (installed) scim-chinese-standard-0.0.2-1.el5.i386
libstdc++.so.6 is needed by (installed) stardict-2.4.5-5.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) libusb-0.1.12-5.1.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) db4-4.3.29-9.fc6.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) libtiff-3.8.2-7.el5.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) beecrypt-4.1.2-10.1.1.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) flac-1.1.2-28.el5_0.1.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) pcre-6.6-2.el5_1.7.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) aspell-0.60.3-7.1.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) groff-1.18.1.1-11.1.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) festival-1.95-5.2.1.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) iptstate-1.4-1.1.2.2.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) ttmkfdir-3.0.9-23.el5.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) dvd+rw-tools-7.0-0.el5.3.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) libmusicbrainz-2.1.1-4.1.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) cdrdao-1.2.1-2.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) mesa-libGLU-6.5.1-7.5.el5.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) opensp-1.5.2-4.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) openjade-1.3.2-27.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) cups-1.2.4-11.18.el5.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) hpijs-1.6.7-4.1.el5_0.3.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) poppler-0.5.4-4.4.el5_1.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) coolkey-1.1.0-6.el5.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) gmp-4.1.4-10.el5.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) libicu-3.6-5.11.1.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) boost-1.33.1-10.el5.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) swig-1.3.29-2.el5.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) doxygen-1.4.7-1.1.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) oprofile-0.9.3-16.el5.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) frysk-0.0.1.2008.03.19.rh1-1.el5.i686
libstdc++.so.6(CXXABI_1.3) is needed by (installed) xulrunner-1.9-0.beta5.6.el5.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) yelp-2.16.0-18.el5.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) evince-0.6.0-8.el5.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) vnc-server-4.1.2-9.el5.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) xulrunner-devel-1.9-0.beta5.6.el5.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) scim-libs-1.4.4-39.el5.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) scim-1.4.4-39.el5.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) scim-tables-0.5.6-7.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) scim-bridge-0.4.5-7.el5.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) scim-pinyin-0.5.91-16.el5.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) scim-chewing-0.3.1-11.el5.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) scim-chinese-standard-0.0.2-1.el5.i386
libstdc++.so.6(CXXABI_1.3) is needed by (installed) stardict-2.4.5-5.i386
libstdc++.so.6(CXXABI_1.3.1) is needed by (installed) opensp-1.5.2-4.i386
libstdc++.so.6(CXXABI_1.3.1) is needed by (installed) vnc-server-4.1.2-9.el5.i386
libstdc++.so.6(CXXABI_1.3.1) is needed by (installed) scim-pinyin-0.5.91-16.el5.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) libusb-0.1.12-5.1.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) db4-4.3.29-9.fc6.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) libtiff-3.8.2-7.el5.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) beecrypt-4.1.2-10.1.1.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) flac-1.1.2-28.el5_0.1.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) pcre-6.6-2.el5_1.7.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) aspell-0.60.3-7.1.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) groff-1.18.1.1-11.1.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) festival-1.95-5.2.1.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) iptstate-1.4-1.1.2.2.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) ttmkfdir-3.0.9-23.el5.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) dvd+rw-tools-7.0-0.el5.3.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) libmusicbrainz-2.1.1-4.1.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) cdrdao-1.2.1-2.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) mesa-libGLU-6.5.1-7.5.el5.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) opensp-1.5.2-4.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) openjade-1.3.2-27.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) cups-1.2.4-11.18.el5.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) hpijs-1.6.7-4.1.el5_0.3.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) poppler-0.5.4-4.4.el5_1.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) coolkey-1.1.0-6.el5.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) gmp-4.1.4-10.el5.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) libicu-3.6-5.11.1.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) boost-1.33.1-10.el5.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) swig-1.3.29-2.el5.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) doxygen-1.4.7-1.1.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) systemtap-0.6.2-1.el5.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) oprofile-0.9.3-16.el5.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) xulrunner-1.9-0.beta5.6.el5.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) yelp-2.16.0-18.el5.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) firefox-3.0-0.beta5.6.el5.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) vnc-server-4.1.2-9.el5.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) xulrunner-devel-1.9-0.beta5.6.el5.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) scim-libs-1.4.4-39.el5.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) scim-1.4.4-39.el5.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) scim-tables-0.5.6-7.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) scim-bridge-0.4.5-7.el5.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) scim-pinyin-0.5.91-16.el5.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) scim-chewing-0.3.1-11.el5.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) scim-chinese-standard-0.0.2-1.el5.i386
libstdc++.so.6(GLIBCXX_3.4) is needed by (installed) stardict-2.4.5-5.i386
libstdc++.so.6(GLIBCXX_3.4.5) is needed by (installed) boost-1.33.1-10.el5.i386
/usr/lib/libstdc++.so.6 is needed by (installed) libstdc++-devel-4.1.2-42.el5.i386
[root@ patches]#
[root@ patches]# rpm -Uvh compat-oracle-el5-1.0-5.i386.rpm
error: Failed dependencies:
compat-gcc-34 is needed by compat-oracle-el5-1.0-5.i386
compat-gcc-34-c++ is needed by compat-oracle-el5-1.0-5.i386
openmotif21 is needed by compat-oracle-el5-1.0-5.i386
[root@ patches]#
[root@ patches]# rpm -Uvh fonts-chinese-3.02-12.el5.noarch.rpm
warning: fonts-chinese-3.02-12.el5.noarch.rpm: Header V3 DSA signature: NOKEY, key ID 1e5e0159
Preparing... ########################################### [100%]
package fonts-chinese-3.02-12.el5 is already installed
file /usr/share/fonts/chinese/misc/taipei16.pcf.gz from install of fonts-chinese-3.02-12.el5 conflicts with file from package fonts-chinese-3.02-12.el5
file /usr/share/fonts/chinese/misc/taipei20.pcf.gz from install of fonts-chinese-3.02-12.el5 conflicts with file from package fonts-chinese-3.02-12.el5
file /usr/share/fonts/chinese/misc/taipei24.pcf.gz from install of fonts-chinese-3.02-12.el5 conflicts with file from package fonts-chinese-3.02-12.el5
[root@ patches]#
[root@ patches]# rpm -Uvh openmotif21-2.1.30-11.EL5.i386.rpm
error: Failed dependencies:
libXp.so.6 is needed by openmotif21-2.1.30-11.EL5.i386
create unix account
password1
oratest1 / oraapp01
groupadd -g 401 dba
useradd -u 501 -d /home/oratest1 -g dba oratest1
passwd oratest1
configure kernel parameters for oracle10g
vi /etc/sysctl.conf
# Controls the maximum shared segment size, in bytes
kernel.shmmax = 4294967295
# Controls the maximum number of shared memory segments, in pages
kernel.shmall = 268435456
# added in 2009/08/21
kernel.shmmni = 4096
# semaphores: semmsl, semmns, semopm, semmni
kernel.sem = 250 32000 100 128
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
refreshing...
[root@ ~]# /sbin/sysctl -p
vi /etc/security/limits.conf
# use for oracle
* soft nproc 2047
* hard nproc 16384
* soft nofile 1024
* hard nofile 65536
vi /etc/pam.d/login 行末添加以下内容
session required pam_limits.so
安装的时候加忽略操作系统判断的参数 ./runInstaller -ignoresysprereqs
伪造为版本4，否则不能安装！安装完成后再更改回来。
vi /etc/redhat-release
Red Hat Enterprise Linux Server release 5.2 (Tikanga)
更改为:
redhat-4
hosts和DNS的设置导致安装出错：
An unexpected exception has been detected in native code outside the VM.
Unexpected Signal : 11 occurred at PC=0x312613
Function=index+0x63
Library=/lib/i686/nosegneg/libc.so.6
Current Java thread:
at oracle.net.common.NetGetEnv.getDNSDomain(Native Method)
at oracle.net.ca.ConfigureProfile.setDefaultProfileParams(Unknown Source)
at oracle.net.ca.InitialSetup.setupConfigObjects(Unknown Source)
at oracle.net.ca.InitialSetup.
at oracle.net.ca.NetCA.main(Unknown Source)
更改hosts及resolv.conf为：
[root@ etc]# cat /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
# 127.0.0.1 zkrapp01 localhost.localdomain localhost
::1 localhost6.localdomain6 localhost6
88.0.33.17 zj-zkrapp01 localhost.localdomain localhost
[root@ etc]# cat resolv.conf
# domainname zking.com
# nameserver 66.0.32.5
# nameserver 66.0.32.6
[root@ etc]#
选择数据库字符集：ZHS16GBK
1* select * from V$NLS_PARAMETERS
SQL> /
PARAMETER VALUE
------------------------------ ------------------------------
NLS_LANGUAGE SIMPLIFIED CHINESE
NLS_TERRITORY CHINA
NLS_CURRENCY ￥
NLS_ISO_CURRENCY CHINA
NLS_NUMERIC_CHARACTERS .,
NLS_CALENDAR GREGORIAN
NLS_DATE_FORMAT YYYY-MM-DD HH24:MI:SS
NLS_DATE_LANGUAGE SIMPLIFIED CHINESE
NLS_CHARACTERSET ZHS16GBK
NLS_SORT BINARY
NLS_TIME_FORMAT HH.MI.SSXFF AM
NLS_TIMESTAMP_FORMAT DD-MON-RR HH.MI.SSXFF AM
NLS_TIME_TZ_FORMAT HH.MI.SSXFF AM TZR
NLS_TIMESTAMP_TZ_FORMAT DD-MON-RR HH.MI.SSXFF AM TZR
NLS_DUAL_CURRENCY ￥
NLS_NCHAR_CHARACTERSET AL16UTF16
NLS_COMP BINARY
NLS_LENGTH_SEMANTICS BYTE
NLS_NCHAR_CONV_EXCP FALSE
已选择19行。
generate database creation scripts: /home/oratest1/admin/test1/scripts
OEM:
the database control URL is:1158/em
[root@ etc]# cd /home/oratest1
[root@ oratest1]# cd oraInventory
[root@ oraInventory]# ls *.sh
orainstRoot.sh
[root@ oraInventory]# ./orainstRoot.sh
Changing permissions of /home/oratest1/oraInventory to 770.
Changing groupname of /home/oratest1/oraInventory to dba.
The execution of the script. is complete
[root@ oraInventory]# cd ..
[root@ oratest1]# pwd
/home/oratest1
[root@ oratest1]# cd ora10g
[root@ ora10g]# ls *.sh
root.sh
[root@ ora10g]# ./root.sh
Running Oracle10 root.sh script...
The following environment variables are set as:
ORACLE_OWNER= oratest1
ORACLE_HOME= /home/oratest1/ora10g
Enter the full pathname of the local bin directory: [/usr/local/bin]:
Copying dbhome to /usr/local/bin ...
Copying oraenv to /usr/local/bin ...
Copying coraenv to /usr/local/bin ...
Creating /etc/oratab file...
Entries will be added to the /etc/oratab file as needed by
Database Configuration Assistant when a database is created
Finished running generic part of root.sh script.
Now product-specific root actions will be performed.
[root@ ora10g]#
如何识别和优化MySQL中的慢速查询？ （慢查询日志，performance_schema）Apr 10, 2025 am 09:36 AM要优化MySQL慢查询，需使用slowquerylog和performance_schema：1.启用slowquerylog并设置阈值，记录慢查询；2.利用performance_schema分析查询执行细节，找出性能瓶颈并优化。
MySQL和SQL：开发人员的基本技能Apr 10, 2025 am 09:30 AMMySQL和SQL是开发者必备技能。1.MySQL是开源的关系型数据库管理系统，SQL是用于管理和操作数据库的标准语言。2.MySQL通过高效的数据存储和检索功能支持多种存储引擎，SQL通过简单语句完成复杂数据操作。3.使用示例包括基本查询和高级查询，如按条件过滤和排序。4.常见错误包括语法错误和性能问题，可通过检查SQL语句和使用EXPLAIN命令优化。5.性能优化技巧包括使用索引、避免全表扫描、优化JOIN操作和提升代码可读性。
描述MySQL异步主奴隶复制过程。Apr 10, 2025 am 09:30 AMMySQL异步主从复制通过binlog实现数据同步，提升读性能和高可用性。1)主服务器记录变更到binlog；2)从服务器通过I/O线程读取binlog；3)从服务器的SQL线程应用binlog同步数据。
mysql：简单的概念，用于轻松学习Apr 10, 2025 am 09:29 AMMySQL是一个开源的关系型数据库管理系统。1）创建数据库和表：使用CREATEDATABASE和CREATETABLE命令。2）基本操作：INSERT、UPDATE、DELETE和SELECT。3）高级操作：JOIN、子查询和事务处理。4）调试技巧：检查语法、数据类型和权限。5）优化建议：使用索引、避免SELECT*和使用事务。
MySQL：数据库的用户友好介绍Apr 10, 2025 am 09:27 AMMySQL的安装和基本操作包括：1.下载并安装MySQL，设置根用户密码；2.使用SQL命令创建数据库和表，如CREATEDATABASE和CREATETABLE；3.执行CRUD操作，使用INSERT,SELECT,UPDATE,DELETE命令；4.创建索引和存储过程以优化性能和实现复杂逻辑。通过这些步骤，你可以从零开始构建和管理MySQL数据库。
InnoDB缓冲池如何工作，为什么对性能至关重要？Apr 09, 2025 am 12:12 AMInnoDBBufferPool通过将数据和索引页加载到内存中来提升MySQL数据库的性能。1)数据页加载到BufferPool中，减少磁盘I/O。2)脏页被标记并定期刷新到磁盘。3)LRU算法管理数据页淘汰。4)预读机制提前加载可能需要的数据页。
MySQL：初学者的数据管理易用性Apr 09, 2025 am 12:07 AMMySQL适合初学者使用，因为它安装简单、功能强大且易于管理数据。1.安装和配置简单，适用于多种操作系统。2.支持基本操作如创建数据库和表、插入、查询、更新和删除数据。3.提供高级功能如JOIN操作和子查询。4.可以通过索引、查询优化和分表分区来提升性能。5.支持备份、恢复和安全措施，确保数据的安全和一致性。
与MySQL中使用索引相比，全表扫描何时可以更快？Apr 09, 2025 am 12:05 AM全表扫描在MySQL中可能比使用索引更快，具体情况包括：1)数据量较小时；2)查询返回大量数据时；3)索引列不具备高选择性时；4)复杂查询时。通过分析查询计划、优化索引、避免过度索引和定期维护表，可以在实际应用中做出最优选择。
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