table1:
CREATE TABLE users (
|
id INT PRIMARY KEY,
|
name VARCHAR(50)
|
);
|
table2
CREATE TABLE orders (
|
id INT PRIMARY KEY,
|
user_id INT,
|
order_date DATE,
|
FOREIGN KEY (user_id) REFERENCES users(id)
|
);
|
Update:
ALTER TABLE users MODIFY COLUMN `id` tinyint(11) unsigned NOT NULL auto_increment;
|
ERROR 1833 (HY000): Cannot change column 'id': used in a foreign key constraint 'orders_ibfk_1' of table 'runzi.orders'
|
|
|
MariaDB [runzi]> SET FOREIGN_KEY_CHECKS=0;
|
Query OK, 0 rows affected (0.001 sec)
|
|
MariaDB [runzi]> ALTER TABLE users MODIFY COLUMN `id` tinyint(11) unsigned NOT NULL auto_increment;
|
ERROR 1833 (HY000): Cannot change column 'id': used in a foreign key constraint 'orders_ibfk_1' of table 'runzi.orders'
|
MariaDB [runzi]>
|
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