Mysql 查看表注释或字段注释

查看所有表的注释:

SELECT
table_name 表名,
table_comment 表说明
FROM
information_schema.TABLES
WHERE
table_schema = '数据库名'
ORDER BY
table_name

查询所有表及字段的注释:

SELECT
a.table_name 表名,
a.table_comment 表说明,
b.COLUMN_NAME 字段名,
b.column_comment 字段说明,
b.column_type 字段类型,
b.column_key 约束
FROM
information_schema. TABLES a
LEFT JOIN information_schema. COLUMNS b ON a.table_name = b.TABLE_NAME
WHERE
a.table_schema = '数据库名'
ORDER BY
a.table_name

查询某表的所有字段的注释:

select 
COLUMN_NAME 字段名,
column_comment 字段说明,
column_type 字段类型,
column_key 约束 from information_schema.columns 
where table_schema = '数据库名'
and table_name = '表名' ; 

或者:

show full columns from 表名;

查看表生成的DDL:

show create table 表名;