1 \u521d\u59cb\u5316\u6570\u636e:<\/p>\n
\/usr\/local\/mysql\/bin\/mysqld --initialize-insecure --user=mysql --datadir=\/opt\/mysql\/data --basedir=\/opt\/mysql<\/p>\n
2 \u914d\u7f6e\u6587\u4ef6<\/p>\n
vim \/etc\/my.cnf<\/p>\n
[mysqld]
\nbasedir=\/usr\/local\/mysql
\ndatadir=\/usr\/local\/mysql\/mydata
\nsocket=\/tmp\/mysql.sock
\nlog_error=\/var\/log\/mysql.log
\nuser=mysql
\nport=6606
\n[mysql]
\nsocket=\/tmp\/mysql.sock<\/p>\n
\u4f5c\u7528:
\n1.\u5f71\u54cd\u670d\u52a1\u7aef\u7684\u542f\u52a8
\n\u6807\u7b7e: [mysqld] [mysqld_safe] [server] ...<\/p>\n
[mysqld]
\nbasedir=\/opt\/mysql
\ndatadir=\/opt\/mysql\/data
\nuser=mysql
\nsocket=\/tmp\/mysql.sock
\nport=3306
\nserver_id=6<\/p>\n
2.\u5f71\u54cd\u5ba2\u6237\u7aef\u8fde\u63a5
\n\u6807\u7b7e: [client] [mysql] [mysqldump] ....<\/p>\n
[mysql]
\nsocket=\/tmp\/mysql.sock<\/p>\n
=======================<\/p>\n
3 \u591a\u5b9e\u4f8b(3307 3308 3309)<\/p>\n
3.1 \u521b\u5efa\u76f8\u5173\u76ee\u5f55
\nmkdir -p \/data\/330{7..9}\/data<\/p>\n
3.2 \u521b\u5efa\u914d\u7f6e\u6587\u4ef6
\ncat>> \/data\/3307\/my.cnf<<EOF
\n[mysqld]
\nbasedir=\/opt\/mysql
\ndatadir=\/data\/3307\/data
\nuser=mysql
\nsocket=\/data\/3307\/mysql.sock
\nport=3307
\nserver_id=3307
\nEOF<\/p>\n
cp \/data\/3307\/my.cnf \/data\/3308
\ncp \/data\/3307\/my.cnf \/data\/3309<\/p>\n
sed -i 's#3307#3308#g' \/data\/3308\/my.cnf
\nsed -i 's#3307#3309#g' \/data\/3309\/my.cnf<\/p>\n
3.3 \u521d\u59cb\u5316\u6570\u636e
\nmysqld --initialize-insecure --user=mysql --datadir=\/data\/3307\/data --basedir=\/opt\/mysql
\nmysqld --initialize-insecure --user=mysql --datadir=\/data\/3308\/data --basedir=\/opt\/mysql
\nmysqld --initialize-insecure --user=mysql --datadir=\/data\/3309\/data --basedir=\/opt\/mysql<\/p>\n
3.4 \u542f\u52a8\u591a\u5b9e\u4f8b
\nchown -R mysql.mysql \/data\/*
\nmysqld_safe --defaults-file=\/data\/3307\/my.cnf &
\nmysqld_safe --defaults-file=\/data\/3308\/my.cnf &
\nmysqld_safe --defaults-file=\/data\/3309\/my.cnf &<\/p>\n
4 \u6d4b\u8bd5<\/p>\n
netstat -lnp|grep 330<\/p>\n
mysql -S \/data\/3307\/mysql.sock
\nmysql -S \/data\/3308\/mysql.sock
\nmysql -S \/data\/3309\/mysql.sock<\/p>\n
5 systemd\u7ba1\u7406\u591a\u5b9e\u4f8b<\/p>\n
cat >> \/etc\/systemd\/system\/mysqld3307.service <<EOF
\n[Unit]
\nDescription=MySQL Server
\nDocumentation=man:mysqld(8)
\nDocumentation=http:\/\/dev.mysql.com\/doc\/refman\/en\/using-systemd.html
\nAfter=network.target
\nAfter=syslog.target
\n[Install]
\nWantedBy=multi-user.target
\n[Service]
\nUser=mysql
\nGroup=mysql
\nExecStart=\/opt\/mysql\/bin\/mysqld --defaults-file=\/data\/3307\/my.cnf
\nLimitNOFILE = 5000
\nEOF
\ncp \/etc\/systemd\/system\/mysqld3307.service \/etc\/systemd\/system\/mysqld3308.service
\ncp \/etc\/systemd\/system\/mysqld3307.service \/etc\/systemd\/system\/mysqld3309.service
\nsed -i 's#3307#3308#g' \/etc\/systemd\/system\/mysqld3308.service
\nsed -i 's#3307#3309#g' \/etc\/systemd\/system\/mysqld3309.service<\/p>\n
systemctl start mysqld3307
\nsystemctl start mysqld3308
\nsystemctl start mysqld3309
\nnetstat -lnp|grep 330
\nsystemctl stop mysqld3309
\nsystemctl stop mysqld3308
\nsystemctl stop mysqld3307
\nsystemctl enable mysqld3307
\nsystemctl enable mysqld3308
\nsystemctl enable mysqld3309<\/p>\n
6.\u5fd8\u8bb0\u5bc6\u7801\u5904\u7406<\/p>\n
mysqladmin -uroot -p password 123<\/p>\n
select user,authentication_string,host from mysql.user;<\/p>\n
1.\u505c\u6570\u636e\u5e93
\n\/etc\/init.d\/mysqld stop
\n2.\u542f\u52a8\u6570\u636e\u5e93\u4e3a\u65e0\u5bc6\u7801\u9a8c\u8bc1\u6a21\u5f0f
\nmysqld_safe --skip-grant-tables --skip-networking &
\nupdate mysql.user set authentication_string=PASSWORD('456') where user='root' and host='localhost';
\n\/etc\/init.d\/mysqld restart<\/p>\n
[root@standby ~]# mysql -uroot -p123
\n[root@standby ~]# mysql -uroot -p456<\/p>\n
<\/p>\n
7.\u6570\u636e\u7c7b\u578b\u548c\u5b57\u7b26\u96c6<\/p>\n
\u6574\u578b
\nint \u6700\u591a\u5b5810\u4f4d\u6570\u5b57
\n-2^31 ~ 2^31-1
\n2^32 10\u4f4d\u6570 11
\n\u6d6e\u70b9<\/p>\n
\u5b57\u7b26\u4e32\u7c7b\u578b
\nchar \u5b9a\u957f,\u5b58\u50a8\u6570\u636e\u6548\u7387\u8f83\u9ad8,\u5bf9\u4e8e\u53d8\u5316\u8f83\u591a\u7684\u5b57\u6bb5,\u7a7a\u95f4\u6d6a\u8d39\u8f83\u591a
\nvarchar \u53d8\u957f,\u5b58\u50a8\u65f6\u5224\u65ad\u957f\u5ea6,\u5b58\u50a8\u4f1a\u6709\u989d\u5916\u5f00\u9500,\u6309\u9700\u5206\u914d\u5b58\u50a8\u7a7a\u95f4.
\nenum
\n\u65f6\u95f4
\ndatetime
\ntimestamp
\ndate
\ntime<\/p>\n
SQL\u8bed\u53e5\u89c4\u8303\u7b2c\u4e94\u6761:
\n1.\u5c11\u4e8e10\u4f4d\u7684\u6570\u5b57int ,\u5927\u4e8e10\u4f4d\u6570 char,\u4f8b\u5982\u624b\u673a\u53f7
\n2.char\u548cvarchar\u9009\u62e9\u65f6,\u5b57\u7b26\u957f\u5ea6\u4e00\u5b9a\u4e0d\u53d8\u7684\u53ef\u4ee5\u4f7f\u7528char,\u53ef\u53d8\u7684\u5c3d\u91cf\u4f7f\u7528varchar
\n\u5728\u53ef\u53d8\u957f\u5ea6\u7684\u5b58\u50a8\u65f6,\u5c06\u6765\u4f7f\u7528\u4e0d\u540c\u7684\u6570\u636e\u7c7b\u578b,\u5bf9\u4e8e\u7d22\u5f15\u6811\u7684\u9ad8\u5ea6\u662f\u6709\u5f71\u54cd\u7684.
\n3.\u9009\u62e9\u5408\u9002\u7684\u6570\u636e\u7c7b\u578b
\n4.\u5408\u9002\u957f\u5ea6<\/p>\n
<\/p>\n
\u8f6c\u81ea\uff1ahttps:\/\/www.cnblogs.com\/zhaijihai\/p\/10274860.html<\/p>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
1 \u521d\u59cb\u5316\u6570\u636e: \/usr\/local\/mysql\/bin\/mysqld --i … \u7ee7\u7eed\u9605\u8bfb