MySQL error #1064 in CREATE TABLE

Question

Here's my sql for two tables I'm creating:

CREATE TABLE IF NOT EXISTS tbl_a(
    id INT(6) UNSIGNED NOT NULL,
    PRIMARY KEY(id)
)ENGINE = INNODB;

CREATE TABLE IF NOT EXISTS tbl_b(
    id INT(6) UNSIGNED NOT NULL,
    PRIMARY KEY(id),
    FOREIGN KEY id REFERENCES tbl_a(id) ON DELETE CASCADE ON UPDATE CASCADE
)ENGINE = INNODB;

This is the error I'm getting:

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'REFERENCES a(id) ON DELETE CASCADE ON UPDATE CASCADE )ENGINE = INNODB' at line 4

Could anyone suggest me a solution, please?

Answer 1

Add () around the key name

CREATE TABLE IF NOT EXISTS tbl_b(
    id INT(6) UNSIGNED NOT NULL,
    PRIMARY KEY(id),
    FOREIGN KEY (id) REFERENCES tbl_a(id) ON DELETE CASCADE ON UPDATE CASCADE
)ENGINE = INNODB;