1,新建表以及添加表和字段的注释.
create table t_user(
ID INT(19) primary key auto_increment comment '主键',
NAME VARCHAR(300) comment '姓名',
CREATE_TIME date comment '创建时间'
)comment = '用户信息表';
alter table t_user comment = '修改后的表注释信息(用户信息表)';
alter table t_user modify column id int comment '主键ID';
--注意:字段名和字段类型照写就行
use information_schema;
select * from TABLES where TABLE_SCHEMA='my_db';
--查询某一张表的
use information_schema;
select * from TABLES where TABLE_SCHEMA='my_db' and TABLE_NAME= 'auth_user';
use information_schema;
select * from information_schema.columns where table_schema ='my_db' and table_name = 'auth_user';
show create table table_name;
use my_db;
show full columns from auth_user;