我無法在mysql中編輯另一個表具有外鍵的表

Question

這是我在MySQL中的SQL代碼：

create table Table1
(
  id varchar(2),
  name varchar(2),
  PRIMARY KEY (id)
);


Create table Table1_Addr
(
  addid varchar(2),
  Address varchar(2),
  PRIMARY KEY (addid)
);

Create table Table1_sal
(
  salid varchar(2),
  addid varchar(2),
  id varchar(2),
  PRIMARY KEY (salid),
  index(addid),
  index(id),
  FOREIGN KEY (addid) REFERENCES Table1_Addr(addid),
  FOREIGN KEY (id) REFERENCES Table1(id)
)

Table1和Table1_Addr是兩個表，Table1_sal具有指向這兩個表的兩個外鍵。

我的問題是我無法更改Table1的id字段和Table1_Addr的addid字段

錯誤是：

#1451 - Cannot delete or update a parent row: a foreign key constraint
fails (`avl`.`table1_sal`, CONSTRAINT `table1_sal_ibfk_2` FOREIGN KEY (`id`)
REFERENCES `table1` (`id`))

編輯-答案是：

create table Table1
(
  id varchar(2),
  name varchar(2),
  PRIMARY KEY (id)
);


Create table Table1_Addr
(
  addid varchar(2),
  Address varchar(2),
  PRIMARY KEY (addid)
);

Create table Table1_sal
(
  salid varchar(2),
  addid varchar(2),
  id varchar(2),
  PRIMARY KEY (salid),
  index(addid),
  index(id),
  FOREIGN KEY (addid) REFERENCES Table1_Addr(addid)ON UPDATE CASCADE ON DELETE CASCADE,
  FOREIGN KEY (id) REFERENCES Table1(id)ON UPDATE CASCADE ON DELETE CASCADE
)

Answer 1

在外鍵定義之后添加ON UPATE CASCADE

    FOREIGN KEY (addid) REFERENCES Table1_Addr(addid) ON UPDATE CASCADE ON DELETE CASCADE,
  FOREIGN KEY (id) REFERENCES Table1(id) ON UPDATE CASCADE ON DELETE CASCADE

Answer 2

您必須將外鍵設置為On Update級聯，然后所有子行也將被更新

     Create table Table1_sal
(
  salid varchar(2),
  addid varchar(2),
  id varchar(2),
  PRIMARY KEY (salid),
  index(addid),
  index(id),
  FOREIGN KEY (addid) REFERENCES Table1_Addr(addid) 
   On delete cascade On Update cascade ,
  FOREIGN KEY (id) REFERENCES Table1(id) 
   On delete cascade On Update cascade
)

Answer 3

您無法更改Table1和Table1_Addr的主鍵（即Table1_Addr的外鍵）的問題是關系數據庫的正常行為，例如MySQL，