一、表注释
1、添加表注释
comment on table scheduler_table is '调度表'
2、删除表注释
comment on table scheduler_table is ''
3、查询表注释
select * from user_tab_comments where table_name='SCHEDULER_TABLE'
4、 添加字段注释
comment on column scheduler_table.id is '主键值';
5、查询表字段注释
select * from user_col_comments where table_name='SCHEDULER_TABLE'