如何为一个主键 SQL 插入两行？

Question

学习SQL并创建了下表：

+-------+-------+---------+-----------------------+---------+----------+
| idnum | lname | fname   | rname                 | private | linkblue |
+-------+-------+---------+-----------------------+---------+----------+
| 40256 | South | William | south.william@uky.edu |       1 | weso123  |
| 68123 | Smith | Terry   | smith.terry@uky.edu   |       1 | tlsm321  |
+-------+-------+---------+-----------------------+---------+----------+

我需要使用将其中一个名称的地址信息输入到另一个带有以下条目的表中，使用以下代码创建表：

CREATE TABLE ADDR (idnum INT NOT NULL, adtype varchar(10), CONSTRAINT ad CHECK (adtype IN ('bill', 'permanent', 'local')), streetaddr varchar(60) NOT NULL, city varchar(40) NOT NULL, state char(2) NOT NULL, country char(2) NOT NULL, zip varchar(10), PRIMARY KEY (idnum), FOREIGN KEY (idnum) REFERENCES PERSON (idnum));

+------------+-------------+------+-----+---------+-------+
| Field      | Type        | Null | Key | Default | Extra |
+------------+-------------+------+-----+---------+-------+
| idnum      | int(11)     | NO   | PRI | NULL    |       |
| adtype     | varchar(10) | YES  |     | NULL    |       |
| streetaddr | varchar(60) | NO   |     | NULL    |       |
| city       | varchar(40) | NO   |     | NULL    |       |
| state      | char(2)     | NO   |     | NULL    |       |
| country    | char(2)     | NO   |     | NULL    |       |
| zip        | varchar(10) | YES  |     | NULL    |       |
+------------+-------------+------+-----+---------+-------+

但是我需要为那个人输入两个地址，一个是本地地址，一个是帐单地址，但我不断收到以下错误：

ERROR 1062 (23000): Duplicate entry '40256' for key 'PRIMARY'

这是我用来尝试输入该数据的代码：

INSERT INTO ADDR VALUE (40256, "bill", "street1", "city1", "state1", "country1", zip1), (40256, "local", "street2", "city2", "state2", "country2", zip2);

Answer 1

您的 idnum 是主键，它在 addr 表中必须是唯一的。

使用

CREATE TABLE ADDR (
    idnum INT NOT NULL AUTO_INCREMENT, 
    person_idnum INT NOT NULL, 
    adtype varchar(10), 
    CONSTRAINT ad CHECK (adtype IN ('bill', 'permanent', 'local')), 
    streetaddr varchar(60) NOT NULL, 
    city varchar(40) NOT NULL, 
    state char(2) NOT NULL, 
    country char(2) NOT NULL, 
    zip varchar(10), 
 PRIMARY KEY (idnum), FOREIGN KEY (person_idnum) REFERENCES PERSON (idnum));

INSERT INTO ADDR VALUE 
    (NULL, 40256, "bill", "street1", "city1", "state1", "country1", zip1), 
    (NULL, 40256, "local", "street2", "city2", "state2", "country2", zip2);