Setting method: 1. Use the "create table table name (field name field type comment 'field comment');" statement; 2. Use "alter table table name modify column field name field type comment 'field The comment ';' statement.
The operating environment of this tutorial: windows7 system, mysql8 version, Dell G3 computer.
In the MySQL database, comments on fields or columns are added using the comment attribute.
In the script that creates a new table, you can add comments by adding the comment attribute in the field definition script.
Write field comments when creating a table
create table test1 ( field_name int comment '字段的注释' );
Modify field comments
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
View field comments Method
-- 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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