sql - Postgresql-Insert值出现非空冲突

Question

insert into "StarSchema"."Customer" 
(address,address2,district,postal_code,phone)
select address,address2,district,postal_code,phone
from public.address;

我试图将另一个表中的值插入到我刚刚创建的表中。但是我不知道为什么会有非null的冲突。由于此查询不包含(customer_id)这是主键。而且我没有在模式要求非null中定义任何值。地址2中有一些值，而postal_code为null。当我在查询中删除这两列时。一切正常。有什么方法可以将所有列都放入新表中？

    CREATE TABLE "StarSchema"."Customer"
(
    first_name character varying COLLATE pg_catalog."default",
    last_name character varying COLLATE pg_catalog."default",
    activebool boolean,
    create_date date,
    address character varying COLLATE pg_catalog."default",
    address2 character varying COLLATE pg_catalog."default",
    district character varying COLLATE pg_catalog."default",
    postal_code character varying COLLATE pg_catalog."default",
    city character varying COLLATE pg_catalog."default",
    country character varying COLLATE pg_catalog."default",
    phone character varying COLLATE pg_catalog."default",
    customer_id integer NOT NULL,
    email character varying COLLATE pg_catalog."default",
    active integer,
    CONSTRAINT "Customer_pkey" PRIMARY KEY (customer_id)
)

问题中的错误信息是
错误:空值违反字段“customer_id”中的非空约束

Answer 1

大概是想让customer_id自动分配。如果是这样，则将其定义为:

customer_id integer generated always as identity primary key,

或在较旧的Postgres版本中:

customer_id serial primary key,

附带说明一下，我通常将主键设为表的第一列，而不是最后一列。