MySQL 积累

Error Code: 1175. You are using safe update mode and you tried to update a table without a WHERE that uses a KEY column To disable safe mode, toggle the option in Preferences -> SQL Editor -> Query Editor and reconnect.    0.020 sec
解决方案：

SET SQL_SAFE_UPDATES = 0;

'ALTER TABLE `account_category` auto_increment = 1;

查看所有用户

select user,host,password from mysql.user;

查看用户权限

show grants for 用户

远程访问数据库权限设置

GRANT USAGE ON *.* TO 'user'@'%' IDENTIFIED BY PASSWORD '*6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9'

GRANT ALL PRIVILEGES ON `table_sample`.* TO 'user'@'%'

修改用户权限：

update mysql.user set password = password("user") where mysql.user.user = "user";
flush privileges;

修改表的字段名称
alter table` table_name` change `a1` `a2` text;

修改表名:

//alter table 表名 rename to 新表名

alter table `table_name` rename to `table_another_name`

//修改字段类型

alter table interest_table modify interest_field varchar(10000);

//安装mysql数据库后：

在mysql的配置文件中，修改

[client]

default-character-set=utf-8

[mysqld]

character_set_server=utf8 (5.5版本的使用这个)