语句1、

## 根据数据库查询表名和表注释

SELECT

    TABLE_NAME AS tableName,

    TABLE_COMMENT AS tableComment 

FROM

    information_schema.`TABLES` 

WHERE

    TABLE_SCHEMA = 'test_db';    

语句2、

## 根据数据库和表查询表字段名和字段注释

SELECT

    column_name,

    data_type,

    column_comment,

    IF(column_key='PRI','是','否') AS '主键唯一',

    IF(IS_NULLABLE='NO','是','否') AS '非空',

    column_type 

FROM

    information_schema.COLUMNS 

WHERE

    table_name = "test_table" AND table_schema = 'test_db';