MYSQL使用经验(十)-常用命令
MYSQL使用心得(十)----常用命令 查看引擎 show engines \G; 查看变量 show variables like '%binlog_format%'; 查看状态 show status like '%conn%'; mysql免登录执行命令 mysql -uroot -e "show slave status\G;" mysql指定配置文件登录 ./bin/mysql --defau
MYSQL使用心得(十)----常用命令查看引擎
show engines \G;
查看变量
show variables like '%binlog_format%';
查看状态
show status like '%conn%';
mysql免登录执行命令
mysql -uroot -e "show slave status\G;"
mysql指定配置文件登录
./bin/mysql --defaults-file=/root/mysql/my.cnf -uroot
锁表
FLUSH TABLES WITH READ LOCK;
解锁
UNLOCK TABLES;
mysql调试语法
在报错以后,执行SHOW WARNINGS;
可以看到详细信息
开放ROOT远程访问,一般不要这么做
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%'WITH GRANT OPTION;
乱码
命令行登陆MySQL,查看编码
mysql> show variables like '%character%'
创建数据库
create database my_test;
授权
grant all privileges on my_test.* to my_test@'%' identified by 'my_test_123';
修改root密码
update mysql.user set password=password('open') where user='root';
flush privileges;
备份数据(其中可以人工指定socket参数 --socket=/application/search/mysql/mysql/tmp/mysql.sock)
./mysqldump -uroot my_test -v > /data0/search/my_test.sql
./mysqldump -uroot -popen opendata -v > /data0/search/my_test.sql
备份存储过程和函数
./mysqldump -uroot -popen -n -t -d -R opendata1 > /data0/search/opendata1_produce.sql
备份全部数据库快照
mysqldump
-uroot -p -h127.0.0.1 -P3306 --all-databases --triggers --routines --events >all.sql
导入
1)先登录,首先要登录mysql,可以看到导入过程,但是终端网络断开,则导入终止
source /data0/search/my_test.sql
2)无需登录,后台执行导入命令,但是看不到过程
./mysql -uroot my_test
统计表行数
use INFORMATION_SCHEMA;
select TABLE_ROWS,TABLE_NAME, TABLE_SCHEMA from tables where TABLE_SCHEMA='my_test';
select sum(TABLE_ROWS) from tables where TABLE_SCHEMA='my_test';
查看服务器线程
show processlist;
查看创建表的结构
show create table 表名;

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