Mysql 安装

 

        电脑重装了系统以后mysql数据库服务也没有了，就重新从网上载了一个注意要下载Mysql Server，我开始下载了一个解压后是一个文件夹，里面就没有.exe可执行文件，我就挺郁闷，以为是下错了呢，后来就又下载了一个是.exe的，可是安装的时候提示：This application requires .NET Framework 4.0 ，难道我还要装个.NET环境吗？于是我就放弃了，又上网查了查又好多配置mysql服务的帖子，可是写的我看的不是很明白要干什么，我就抱着试一试的态度去跟着做了一下结果还成功了，我今天把我的做法发出来，希望有在这方面遇到同样问题的同学可以为你们提供一些思路。

     1.把下载好的Mysql服务解压到指定目录，我是将解压后的文件夹重命名为MySQL然后放在了D盘的根目录下路径为D:\MySQL.然后查看MySQL里面有没有my-default.ini文件，有的话直接打开修改，没有就新建一个，内容主要如下红色的路径要写对,其他就是的一些mysql的配置信息

# MySQL Server Instance Configuration File
# ----------------------------------------------------------------------
# Generated by the MySQL Server Instance Configuration Wizard
#
#
# Installation Instructions
# ----------------------------------------------------------------------
#
#
# CLIENT SECTION
# ----------------------------------------------------------------------
#
# The following options will be read by MySQL client applications.
# Note that only client applications shipped by MySQL are guaranteed
# to read this section. If you want your own MySQL client program to
# honor these values, you need to specify it as an option during the
# MySQL client library initialization.
#
[client]
port=3306
[mysql]
default-character-set=gbk
# SERVER SECTION
# ----------------------------------------------------------------------
#
# The following options will be read by the MySQL Server. Make sure that
# you have installed the server correctly (see above) so it reads this
# file.
#
[mysqld]
# The TCP/IP Port the MySQL Server will listen on
port=3306
#Path to installation directory. All paths are usually resolved relative to this.
basedir="D:\MySQL\"
#Path to the database root
datadir="D:\MySQL\Data"
[WinMySQLadmin]
Server="D:\MySQL\bin\mysqld.exe"
# The default character set that will be used when a new schema or table is
# created and no character set is defined
default-character-set=gbk
# The default storage engine that will be used when create new tables when
default-storage-engine=INNODB
# Set the SQL mode to strict
sql-mode="STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"
# The maximum amount of concurrent sessions the MySQL server will
# allow. One of these connections will be reserved for a user with
# SUPER privileges to allow the administrator to login even if the
# connection limit has been reached.
max_connections=100
# Query cache is used to cache SELECT results and later return them
# without actual executing the same query once again. Having the query
# cache enabled may result in significant speed improvements, if your
# have a lot of identical queries and rarely changing tables. See the
# "Qcache_lowmem_prunes" status variable to check if the current value
# is high enough for your load.
# Note: In case your tables change very often or if your queries are
# textually different every time, the query cache may result in a
# slowdown instead of a performance improvement.
query_cache_size=0
# The number of open tables for all threads. Increasing this value
# increases the number of file descriptors that mysqld requires.
# Therefore you have to make sure to set the amount of open files
# allowed to at least 4096 in the variable "open-files-limit" in
# section [mysqld_safe]
table_cache=256
# Maximum size for internal (in-memory) temporary tables. If a table
# grows larger than this value, it is automatically converted to disk
# based table This limitation is for a single table. There can be many
# of them.
tmp_table_size=26M
# How many threads we should keep in a cache for reuse. When a client
# disconnects, the client's threads are put in the cache if there aren't
# more than thread_cache_size threads from before. This greatly reduces
# the amount of thread creations needed if you have a lot of new
# connections. (Normally this doesn't give a notable performance
# improvement if you have a good thread implementation.)
thread_cache_size=8
#*** MyISAM Specific options
# The maximum size of the temporary file MySQL is allowed to use while
# recreating the index (during REPAIR, ALTER TABLE or LOAD DATA INFILE.
# If the file-size would be bigger than this, the index will be created
# through the key cache (which is slower).
myisam_max_sort_file_size=100G
# If the temporary file used for fast index creation would be bigger
# than using the key cache by the amount specified here, then prefer the
# key cache method. This is mainly used to force long character keys in
# large tables to use the slower key cache method to create the index.
myisam_sort_buffer_size=52M
# Size of the Key Buffer, used to cache index blocks for MyISAM tables.
# Do not set it larger than 30% of your available memory, as some memory
# is also required by the OS to cache rows. Even if you're not using
# MyISAM tables, you should still set it to 8-64M as it will also be
# used for internal temporary disk tables.
key_buffer_size=40M
# Size of the buffer used for doing full table scans of MyISAM tables.
# Allocated per thread, if a full scan is needed.
read_buffer_size=64K
read_rnd_buffer_size=256K
# This buffer is allocated when MySQL needs to rebuild the index in
# REPAIR, OPTIMZE, ALTER table statements as well as in LOAD DATA INFILE
# into an empty table. It is allocated per thread so be careful with
# large settings.
sort_buffer_size=256K
#*** INNODB Specific options ***
innodb_data_home_dir="D:\MySQL\Data\INNODB\"
# Use this option if you have a MySQL server with InnoDB support enabled
# but you do not plan to use it. This will save memory and disk space
# and speed up some things.
#skip-innodb
# Additional memory pool that is used by InnoDB to store metadata
# information. If InnoDB requires more memory for this purpose it will
# start to allocate it from the OS. As this is fast enough on most
# recent operating systems, you normally do not need to change this
# value. SHOW INNODB STATUS will display the current amount used.
innodb_additional_mem_pool_size=2M
# If set to 1, InnoDB will flush (fsync) the transaction logs to the
# disk at each commit, which offers full ACID behavior. If you are
# willing to compromise this safety, and you are running small
# transactions, you may set this to 0 or 2 to reduce disk I/O to the
# logs. Value 0 means that the log is only written to the log file and
# the log file flushed to disk approximately once per second. Value 2
# means the log is written to the log file at each commit, but the log
# file is only flushed to disk approximately once per second.
innodb_flush_log_at_trx_commit=1
# The size of the buffer InnoDB uses for buffering log data. As soon as
# it is full, InnoDB will have to flush it to disk. As it is flushed
# once per second anyway, it does not make sense to have it very large
# (even with long transactions).
innodb_log_buffer_size=1M
# InnoDB, unlike MyISAM, uses a buffer pool to cache both indexes and
# row data. The bigger you set this the less disk I/O is needed to
# access data in tables. On a dedicated database server you may set this
# parameter up to 80% of the machine physical memory size. Do not set it
# too large, though, because competition of the physical memory may
# cause paging in the operating system. Note that on 32bit systems you
# might be limited to 2-3.5G of user level memory per process, so do not
# set it too high.
innodb_buffer_pool_size=77M
# Size of each log file in a log group. You should set the combined size
# of log files to about 25%-100% of your buffer pool size to avoid
# unneeded buffer pool flush activity on log file overwrite. However,
# note that a larger logfile size will increase the time needed for the
# recovery process.
innodb_log_file_size=39M
# Number of threads allowed inside the InnoDB kernel. The optimal value
# depends highly on the application, hardware as well as the OS
# scheduler properties. A too high value may lead to thread thrashing.
innodb_thread_concurrency=8

        2.上面的my-default.ini(也可以是其他名字，如my.ini)文件弄好后,就是配置环境变量了，这个和配置jdk时相差不多，在windows环境变量里新建：变量名称：MYSQL_HOME，变量值：D:\MySQL\,然后在path里添加D:\MySQL\bin,注意path里面原来有内容要加上分号如：xxx;D:\MySQL\bin.

      3.从cmd进入MySQL解压目录下的 bin 目录下,输入服务安装命令:

                       mysqld install MySQL --defaults-file="D:\MySQL\my-default.ini"

安装成功后提示Service successfully installed.

      4.到这里mysql就安装好了，然后启动服务，在命令中输入net start mysql，提示mysql服务正在启动，mysql服务正在启动成功则OK了。当然也可以重window7电脑右键管理中找服务，在那里启动也行。

      5.在此mysql服务就完全配置好了，可以找个mysql图形界面管理就行了。这里的mysql的用户名是root，密码是没有的，如果想修改密码则可以在打开命令输入：mysql –uroot 就进入mysql数据库服务了，然后输入show databases;这样就把所有数据库显示出来了，然后输入use mysql;再输入UPDATE user SET password=PASSWORD("123456") WHERE user='root';这样就讲密码改为123456了， 再输入flush privileges;

 

 

 

       我就是这样配置的，这是我第一次发帖也不知道格式会是怎样的估计很糟糕，内容大家可以参考，有不足的大家见谅，有没弄明白的可以联系我，共同探讨。