How to view field comments in mysql

Mysql method to view field comments: execute the [show full columns from test] command to view. If we want to view the comments of the data table, we can execute the [show create table test] command.

The specific method is as follows:

(Learning video recommendation: mysql video tutorial)

Create Write comments when writing a table

create table test1
(
field_name int comment '字段的注释'
)comment='表的注释';

Modify the comments of the table

alter table test1 comment '修改后的表的注释';

Modify the comments of the fields

alter table test1 modify column field_name int comment '修改后的字段注释';
--注意：字段名和字段类型照写就行

(Related tutorial recommendations: mysql tutorial)

How to view table comments

--在生成的SQL语句中看
show create table test1;

--在元数据的表里面看
use information_schema;
select * from TABLES where TABLE_SCHEMA='my_db' and TABLE_NAME='test1' \G

How to view field comments

--show
show full columns from test1;
--在元数据的表里面看
select * from COLUMNS where TABLE_SCHEMA='my_db' and TABLE_NAME='test1' \G

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