Mysql 查看錶註釋或字段註釋

查看所有表的註釋:

SELECT
table_name 表名,
table_comment 表說明
FROM
information_schema.TABLES
WHERE
table_schema = '數據庫名'
ORDER BY
table_name

查詢所有表及字段的註釋:

SELECT
a.table_name 表名,
a.table_comment 表說明,
b.COLUMN_NAME 字段名,
b.column_comment 字段說明,
b.column_type 字段類型,
b.column_key 約束
FROM
information_schema. TABLES a
LEFT JOIN information_schema. COLUMNS b ON a.table_name = b.TABLE_NAME
WHERE
a.table_schema = '數據庫名'
ORDER BY
a.table_name

查詢某表的所有字段的註釋:

select 
COLUMN_NAME 字段名,
column_comment 字段說明,
column_type 字段類型,
column_key 約束 from information_schema.columns 
where table_schema = '數據庫名'
and table_name = '表名' ; 

或者:

show full columns from 表名;

查看錶生成的DDL:

show create table 表名;