Mysql create table with multiple foreign key on delete set null

Question

I am trying to create a database with multiple foreign keys with delete/ update constraints, but I got a error code 1005 with following sql scripts:

CREATE T         


        

Answer 1

Try with create table(innoDB enginer) without foreign key and use the update table with constraint syntax, for example:

ALTER TABLE `vineyard`
        ADD CONSTRAINT `relation_farmer_has_many_vineyards`
            FOREIGN KEY (`farmer_id`)
            REFERENCES `worker` (`worker_id`)
            ON DELETE SET NULL
            ON UPDATE CASCADE;

Reference:

• http://dev.mysql.com/doc/refman/5.6/en/innodb-foreign-key-constraints.html

Trick: is not recommended to use capital letters(or camel case) in the names of the tables that the behavior differs from the operating system being used:

• http://dev.mysql.com/doc/refman/5.1/en/identifier-case-sensitivity.html