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Mysql foreign key error 1005 errno 150

foreign key a ( a) references t1( a) ) engine= innodbERROR 1005 ( HY000) : Can' t create table ' test. t2' ( errno: show warnings. You can check the status of InnoDB ( SHOW ENGINE INNODB STATUS ) to determine the exact reason why the constraints are failing. The other option is to add the foreign key constraints after creating the table. In your case, it appears that. huga_ table_ namer' ( errno: 150) そこで、 以下のコマンドで最新の外部キー制約エラーの詳細を確認すること ができる。 SHOW ENGINE INNODB STATUS\ G; これを実行すると. If you try to create a constraint from table BAR to table FOO, it will not work on certain MySQL versions. Fix the issue by following:. MySQL error code 150: Foreign key constraint is incorrectly formed. Changing the syntax of. 外部キー制約を付けたテーブル作成時、 以下のエラーが発生した. このメッセージがあまり親切で なく、 原因には色々な可能性が考えられる。. You can' t create a foreign key to a table with a multiple primary key referencing only one field of that primary key.

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    Mysql error errno

    So your problem lies here: CONSTRAINT fk_ Routes FOREIGN KEY ( routeNo) REFERENCES Stop( routeNo),. MySQL' s generic “ errno 150” message “ means that a foreign key constraint was not correctly formed. If MySQL reports an error number 1005 from a CREATE TABLE statement, and the error message refers to error 150, table creation failed. When creating a foreign key constraint, MySQL requires a usable index on both the referencing table and also on the referenced table. The index on the referencing table is created automatically if one doesn' t exist, but order to use foreign keys, the tables must both be InnoDB. ( Actually, if both tables are MyISAM then you won' t get an error message - it just won' t create the key. ) In Query Browser, you can specify the table type. The problem is you' ve forgotten to define a primary key for the STAFF table: CREATE TABLE STAFF ( PKSTAFF_ ID VARCHAR ( 20) PRIMARY KEY, NAME VARCHAR( 50), ADHAAR_ NO BIGINT ( 12), CONTACT_ NO.