博主是在校大二学生,粗浅的把自己在mac上摸索出的经验整理一下
这两天刚把学校布置在oracle平台上的sql命令实验做完,开始着手做数据库课程设计
众所周知,学校的老师一般都会认为你们用的是windows系统(此处省略一万句mmp),所以macos上安装软件都必须自己摸索
首先要建立数据库,我选择了先下载mysql 搭环境
百度搜索 mysql 第一项就能找到
进入mysql的官网,找到download界面
我们要下载的是mysql server 的commuity版本
选择图中出现的版本下载即可
当然可能版本没有很重要,博主选择的是macOS 10.14 (x86, 64-bit), DMG Archive版本 当前最新的版本号是8.0.13
如上图,如果是Windows系统的小伙伴,可能就不太一样了
下载下来文件以后,点开.dmg文件运行 会出现一个.pkg文件 点开运行即可
接下来是本文的重点所在 我们可以点开苹果的finder 看一下我们的mysql文件下载在哪里了
在我们的Macintosh HD下的/usr/local目录下有两个文件 一个是mysql 一个是mysql-8.0.13-macos10.14-x86-64
比对了一下其实这两个文件在我看来是存储了相同的内容,也不敢删除哪一个,万一不好用了就比较麻烦
可以对比一下,可以发现你们电脑里的mysql文件夹下没有my.cnf
这是mac下mysql的配置文件 Windows下应该是叫my.ini
为什么要添加这个文件呢?
因为博主在终端想要调mysql命令的时候,比如在主用户目录下输入$mysql -u root -p的时候
总是给我报command not found 的错误
然后一个简单的方法是在命令行里创建一个一次性链接
输入命令:
$ln -s /usr/local/mysql/bin/mysql /usr/bin
一般来说这时候再去输入$mysql -u root -p 就会跳密码输入提示了
但是博主脸比较黑 命令行提示我:
ln: /usr/bin/mysql: Operation not permitted
那没事 ,我们用sudo提高一下权限 输入命令:
$sudo ln -s /usr/local/mysql/bin/mysql /usr/bin
然后输入密码 发现还是不行 接着给我 ln: /usr/bin/mysql: Operation not permitted
那么没办法 只好采用权宜之计 先用alias命令改个名用一下吧 输入命令:
$alias mysql=/usr/local/mysql/bin/mysql
这时候不管脸再怎么黑,都应该可以输入mysql命令了 可以先用这个方法测试一下
但是难道我每次登陆都去输入一个这个命令吗?
百度搜索了一下,发现好多博主都给出了这样的解答
输入:
cd /usr/local/mysql
回车执行
然后输入:
sudo vim .bash_profile
回车执行
需要输入root用户密码。sudo是使用root用户修改环境变量文件。
进入编辑器后,我们先按"i”,即切换到“插入”状态。
在文档的最下方输入:
export PATH=${PATH}:/usr/local/mysql/bin
然后按Esc退出insert状态,
:wq
实现保存
however 我改过之后也还是不行 可能有些小伙伴可以用这个方法实现
我选择了自己再加一个配置文件
1.在 /etc 新建 my.cnf 文件
sudo vim my.cnf
2.同样的方法,将如下配置内容写入到文件中
# Example MySQL config file for medium systems. # # This is for a system with little memory (32M - 64M) where MySQL plays # an important part, or systems up to 128M where MySQL is used together with # other programs (such as a web server) # # MySQL programs look for option files in a set of # locations which depend on the deployment platform. # You can copy this option file to one of those # locations. For information about these locations, see: # http://dev.mysql.com/doc/mysql/en/option-files.html # # In this file, you can use all long options that a program supports. # If you want to know which options a program supports, run the program # with the "--help" option. # The following options will be passed to all MySQL clients [client] default-character-set=utf8 #password = your_password port = 3306 socket = /tmp/mysql.sock # Here follows entries for some specific programs # The MySQL server [mysqld] character-set-server=utf8 init_connect='SET NAMES utf8 port = 3306 socket = /tmp/mysql.sock skip-external-locking key_buffer_size = 16M max_allowed_packet = 1M table_open_cache = 64 sort_buffer_size = 512K net_buffer_length = 8K read_buffer_size = 256K read_rnd_buffer_size = 512K myisam_sort_buffer_size = 8M character-set-server=utf8 init_connect='SET NAMES utf8' # Don't listen on a TCP/IP port at all. This can be a security enhancement, # if all processes that need to connect to mysqld run on the same host. # All interaction with mysqld must be made via Unix sockets or named pipes. # Note that using this option without enabling named pipes on Windows # (via the "enable-named-pipe" option) will render mysqld useless! # #skip-networking # Replication Master Server (default) # binary logging is required for replication log-bin=mysql-bin # binary logging format - mixed recommended binlog_format=mixed # required unique id between 1 and 2^32 - 1 # defaults to 1 if master-host is not set # but will not function as a master if omitted server-id = 1 # Replication Slave (comment out master section to use this) # # To configure this host as a replication slave, you can choose between # two methods : # # 1) Use the CHANGE MASTER TO command (fully described in our manual) - # the syntax is: # # CHANGE MASTER TO MASTER_HOST=<host>, MASTER_PORT=<port>, # MASTER_USER=<user>, MASTER_PASSWORD=<password> ; # # where you replace <host>, <user>, <password> by quoted strings and # <port> by the master's port number (3306 by default). # # Example: # # CHANGE MASTER TO MASTER_HOST='125.564.12.1', MASTER_PORT=3306, # MASTER_USER='joe', MASTER_PASSWORD='secret'; # # OR # # 2) Set the variables below. However, in case you choose this method, then # start replication for the first time (even unsuccessfully, for example # if you mistyped the password in master-password and the slave fails to # connect), the slave will create a master.info file, and any later # change in this file to the variables' values below will be ignored and # overridden by the content of the master.info file, unless you shutdown # the slave server, delete master.info and restart the slaver server. # For that reason, you may want to leave the lines below untouched # (commented) and instead use CHANGE MASTER TO (see above) # # required unique id between 2 and 2^32 - 1 # (and different from the master) # defaults to 2 if master-host is set # but will not function as a slave if omitted #server-id = 2 # # The replication master for this slave - required #master-host = <hostname> # # The username the slave will use for authentication when connecting # to the master - required #master-user = <username> # # The password the slave will authenticate with when connecting to # the master - required #master-password = <password> # # The port the master is listening on. # optional - defaults to 3306 #master-port = <port> # # binary logging - not required for slaves, but recommended #log-bin=mysql-bin # Uncomment the following if you are using InnoDB tables #innodb_data_home_dir = /usr/local/mysql/data #innodb_data_file_path = ibdata1:10M:autoextend #innodb_log_group_home_dir = /usr/local/mysql/data # You can set .._buffer_pool_size up to 50 - 80 % # of RAM but beware of setting memory usage too high #innodb_buffer_pool_size = 16M #innodb_additional_mem_pool_size = 2M # Set .._log_file_size to 25 % of buffer pool size #innodb_log_file_size = 5M #innodb_log_buffer_size = 8M #innodb_flush_log_at_trx_commit = 1 #innodb_lock_wait_timeout = 50 [mysqldump] quick max_allowed_packet = 16M [mysql] no-auto-rehash # Remove the next comment character if you are not familiar with SQL #safe-updates default-character-set=utf8 [myisamchk] key_buffer_size = 20M sort_buffer_size = 20M read_buffer = 2M write_buffer = 2M [mysqlhotcopy] interactive-timeout
在这之后,你需要把出现在主用户目录下的my.cnf移到mysql目录下 ,实现正常命令执行
出现欢迎界面,大功告成
此后输入mysql -u root -p 不再会报command not found
希望大家数据库课设做的愉快