复合类型定义: postgres=# create type complex as(r double precision,i double precision); CREATE TYPE postgres=# create type persion as(name text,age int,sex boolean); CREATE TYPE postgres=# 使用复合类型创建表: postgres=# create table testfh(id complex,people persion); CREATE TABLE postgres=# postgres=# insert into testfh values ((1,2),('李明','27','1')); INSERT 0 1 postgres=# select * from testfh; id | people -------+------------- (1,2) | (李明,27,t) (1 row) postgres=# select (people).name from testfh; name ------ 李明 (1 row) postgres=# update testfh set people.name='李大明'; UPDATE 1 postgres=# select (people).name from testfh; name -------- 李大明 (1 row) postgres=#