如何說明添加到表

Question

我知道\ d +列出表及其說明如：我想知道如何改變描述或寫一個，如果不存在

      List of relations 
Schema |  Name  | Type | Owner | Size | Description 
--------+-----------------+-------+---------+------------+------------- 
public | table1   | table | me  | 123 kB  | 
public | table2   | table | me  | 123 kB  | 
public | table3   | view | me  | 123 kB  | 
public | table4   | table | me  | 123 kB  | some description 
public | table5   | table | me  | 123 kB  | 
public | table6   | table | me  | 123 kB  | another description 
(6 rows) 

。

Answer 1

comment on table table1 is 'This is a new description'; 
comment on table table4 is 'This is a changed description'; 

手冊中的更多細節：http://www.postgresql.org/docs/current/static/sql-comment.html