Question

I must be missing something obvious, but still…

I get MySQL ERROR 1064 (42000) when I try to run the following:

CREATE TABLE `mgr_user`
(
    `id` INT NOT NULL AUTO_INCREMENT,
    `customer_id` INT NOT NULL,
    `username` VARCHAR(25),
    `password` VARCHAR(100),

    INDEX(`customer_id`),
    FOREIGN KEY `customer_id` REFERENCES `customer`(`id`) ON UPDATE CASCADE ON     DELETE RESTRICT
 );

Answer 1

You need to wrap around the foreign key name with parenthesis. Also your auto column must be a key. See bellow

CREATE TABLE `mgr_user`
(
    `id` INT NOT NULL AUTO_INCREMENT,
    `customer_id` INT NOT NULL,
    `username` VARCHAR(25),
    `password` VARCHAR(100),
    INDEX(`customer_id`),
    UNIQUE KEY (`id`),  --  <- Auto column is should be a key
    FOREIGN KEY (`customer_id`) REFERENCES `customer`(`id`) ON UPDATE CASCADE ON DELETE RESTRICT
 );

After these 2 changes, I got Query OK, 0 rows affected (0.07 sec)