数据库教程:MySQL数据库—数据库管理

— 创建用户，指定明文密码
create user ‘rose’@’localhost’ identified by ‘rosepwd’;

— 查看用户是否创建成功
select user,host from mysql.user;

— 创建用户，不设置密码
create user ‘rose01’@’localhost’;

select user,host from mysql.user;

— 查看密码的哈希值
select password(‘rosepwd’);

— 创建用户，使用哈希值的密码
create user ‘rose02’@’localhost’ identified by password ‘*15151b36b8e49fd6a6222c4af15758661cfce654’;

— 创建用户，并授予用户查询、更新数据库所有表的权限
grant select,update on *.* to ‘testuser’@’localhost’ identified by ‘testpwd’;

select user,host from mysql.user;

— 删除用户
drop user ‘testuser’@’localhost’;

select user,host from mysql.user;

— 删除用户
delete from mysql.user where user = ‘rose02’and host=’localhost’;

select user,host from mysql.user;

— 授予rose用户插入、查询book库所有表的权限
grant insert,select on book.* to ‘rose’@’localhost’;

— 刷新系统权限表
flush privileges;

— 授予rose01用户作用于所有库的所有表的所有权限
grant all privileges on *.* to ‘rose01’@’localhost’;

— 查看用户的权限信息
show grants for ‘rose’@’localhost’;

show grants for ‘rose01’@’localhost’;

— 回收rose用户的作用于book库所有表的插入的权限
revoke insert on book.* from ‘rose’@’localhost’;

flush privileges;

show grants for ‘rose’@’localhost’;

— 查看日志文件的路径
show variables like ‘log_error’;

— 创建新的日志信息表
flush logs;

— 创建新的日志信息表
mysqladmin -uroot -p flush-logs

— 备份book库
mysqldump -uroot -p book >c:mysqlbackupbook_20180120.sql

— 备份book库中的readerinfo表
mysqldump -uroot -p book readerinfo>c:mysqlbackupbook_readerinfo_20180120.sql

— 备份book和mytest库
mysqldump -uroot -p –databases book mytest>c:mysqlbackupbook_mytest_20180120.sql

— 备份所有的数据库
mysqldump -uroot -p –all-databases>c:mysqlbackupdball_20180120.sql

— 恢复book库下的readerinfo表
mysql -uroot -p book<c:mysqlbackupbook_readerinfo_20180120.sql

— 恢复book库下的readerinfo表
use book;
source c:mysqlbackupbook_readerinfo_20180120.sql

— 使用select…into outfile导出readerinfo表的数据到readerinfo.txt这个文件
select * from book.readerinfo into outfile ‘c:/programdata/mysql/mysql server 5.7/uploads/readerinfo.txt’;

— 使用select…into outfile导出readerinfo表的数据到readerinfo.txt这个文件，并设置导出文件的格式
select * from book.readerinfo into outfile ‘c:/programdata/mysql/mysql server 5.7/uploads/readerinfo1.txt’
fields terminated by ‘,’
lines terminated by ‘rn’;

— 使用mysqldump命令导出book库下的bookcategory表
mysqldump -t “c:/programdata/mysql/mysql server 5.7/uploads” -uroot -p book bookcategory

— 使用mysql命令导出book库下的readerinfo表到readerinfo2.txt
mysql -uroot -p –execute=”select * from readerinfo;” book > “c:/programdata/mysql/mysql server 5.7/uploads/readerinfo2.txt”

— 使用load data infile命令导入readerinfo表中的数据
load data infile “c:/programdata/mysql/mysql server 5.7/uploads/readerinfo.txt” into table book.readerinfo;

— 使用mysqlimport命令导入readerinfo表中的数据
mysqlimport -uroot -p book “c:/programdata/mysql/mysql server 5.7/uploads/readerinfo.txt”

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