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Mysql Cannot Create Table Error No 150

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Errno 150 Mysql Foreign Key

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Mysql Error 1005 Can't Create Table

a minute: Sign up MySQL: Can't create table (errno: 150) up vote 122 down vote favorite 19 I am trying to import a .sql file and its failing on creating tables. Here's the query that fails: CREATE TABLE `data` ( `id` int(10) unsigned NOT NULL, `name` varchar(100) NOT NULL, `value` varchar(15) NOT NULL, UNIQUE KEY `id` (`id`,`name`), CONSTRAINT `data_ibfk_1` FOREIGN KEY error 1005 (hy000) can't create table (errno 150) (`id`) REFERENCES `keywords` (`id`) ON DELETE CASCADE ON UPDATE CASCADE ) ENGINE=InnoDB DEFAULT CHARSET=latin1; I exported the .sql from the the same database, I dropped all the tables and now im trying to import it, why is it failing? MySQL: Can't create table './dbname/data.frm' (errno: 150) sql mysql phpmyadmin mysql-error-1005 share|improve this question edited Oct 31 '10 at 0:37 OMG Ponies 199k37360417 asked Oct 31 '10 at 0:24 gtilx 75921018 1 For essentially all the causes of this error, here is an exhaustive resource for what causes errno 150 (and errno 121/other foreign key errors) in MySQL. –John Smith Sep 29 '12 at 0:47 16 I've found that the columns must be identical (even the unsigned flag must match). –Justin Skiles Dec 19 '12 at 19:54 3 @JohnSmith ... where? –Charles Wood Jul 29 '13 at 17:07 3 I suggest reading this blog post that lists 10 possible causes: verysimple.com/2006/10/22/… –Mark Amery Jan 2 '14 at 13:54 1 @trejder Curses! –Charles Wood Nov 7 '14 at 17:16 | show 2 more comments 27 Answers 27

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with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow mysql errno 150 alter table is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up MySQL Foreign Key, Can't create table (errno: 150) up vote 7 down vote http://stackoverflow.com/questions/4061293/mysql-cant-create-table-errno-150 favorite 2 I am trying to build the database and tables for my system. But I found that if I don't add the foreign key in the codes. There is no error. I've used many method try to make the codes works, but it still have error. I am using MySQL 5.5.31, and the codes here: CREATE DATABASE TOS; DROP TABLE TOS.USER CASCADE; DROP TABLE TOS.BILL_HEADER CASCADE; DROP TABLE TOS.TOY http://stackoverflow.com/questions/20166573/mysql-foreign-key-cant-create-table-errno-150 CASCADE; CREATE TABLE TOS.USER (User Char(8), Name Char(10), Type Char(1), Password Char(12), PRIMARY KEY(User)); CREATE TABLE TOS.BILL_HEADER (Bill_No Char(10), CTime DateTime, No_Of INTEGER, Cus_No Char(5), DTime DateTime, PRIMARY KEY(Bill_No)); CREATE TABLE TOS.TOY (Toy_Id Char(10), FullN Char(50), ShortN Char(20), Descrip Char(20), Price DECIMAL, Avail Char(1), Cat Char(1), PRIMARY KEY(Toy_Id)); CREATE TABLE TOS.BILL_ITEM (Bill_No Char(10), BSeq_No INTEGER, Toy_Id Char(10), OTime DateTime, Quan INT, DCondition Char(1), PRIMARY KEY(Bill_No,BSeq_No), FOREIGN KEY(Bill_No) REFERENCES TOS.Bill_Header(Bill_No), FOREIGN KEY(Toy_Id) REFERENCES TOS.TOY(Toy_Id)); Error: 1005 - Can't create table 'TOS.BILL_ITEM' (errno: 150) Any help would be greatly appreciated. mysql foreign-keys mysql-error-1005 share|improve this question asked Nov 23 '13 at 19:06 Confucius 1043310 It does appear to work if I remove the DROP statements.. sqlfiddle.com/#!2/08d1e –Michael Berkowski Nov 23 '13 at 19:10 2 Usually, err 150 is a foreign key error, due to a data type and length mismatch between the column and relation, or a missing index on the primary column. You do have all the correct types and PK indexes defined though. –Michael Berkowski Nov 23 '13 at 19:12 Could you try to remove only one of the foreign keys to narrow the problem? –Oscar Pérez Nov 23 '13 at 19:14 add a comment| 2 Answers 2 active oldest votes up

log in tour help Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies http://dba.stackexchange.com/questions/5437/mysql-foreign-key-cant-create-table-error-150 of this site About Us Learn more about Stack Overflow the company Business https://mariadb.org/mariadb-innodb-foreign-key-constraint-errors/ Learn more about hiring developers or posting ads with us Database Administrators Questions Tags Users Badges Unanswered Ask Question _ Database Administrators Stack Exchange is a question and answer site for database professionals who wish to improve their database skills and learn from others in the community. Join them; it create table only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top MySQL, foreign key, can't create table error 150 up vote 5 down vote favorite 1 UPDATE: Sorry, it was because i forgot to add UNSIGNED attribute to the lang_id column. Original: I'm trying to t create table create a table with foreign key in MySQL. I get this error: #1005 - Can't create table 'xy.trans' (errno: 150) Any ideas whats wrong with the following create statement? CREATE TABLE IF NOT EXISTS `lang` ( `id` INT UNSIGNED NOT NULL AUTO_INCREMENT, `code` CHAR(2) NOT NULL, PRIMARY KEY (`id`) ) ENGINE = InnoDB; CREATE TABLE IF NOT EXISTS `trans` ( `id` INT UNSIGNED NOT NULL AUTO_INCREMENT, `something` TEXT NOT NULL, `lang_id` INT NULL, PRIMARY KEY (`id`), INDEX `index_trans_lang` (`lang_id` ASC), CONSTRAINT `fk_trans_lang` FOREIGN KEY (`lang_id` ) REFERENCES `lang` (`id` ) ON DELETE SET NULL ON UPDATE CASCADE ) ENGINE = InnoDB; mysql foreign-key share|improve this question edited Jan 14 '13 at 12:07 Akash 542318 asked Sep 6 '11 at 10:39 Ben 2613 Ah, +1 for solving your own problem !!! –RolandoMySQLDBA Sep 6 '11 at 15:00 3 @Ben, if you would be so kind as to post your answer as an answer proper, and mark it accepted, you'll get upvotes (higher rep) and it'll be more clear what transpired here. –jcolebrand♦ Sep 6 '11 at 18:08 add a comment| 2 Answers 2 active oldest votes

for Developers MariaDB Contributor Agreement MariaDB Contributor Agreement FAQs Community Ambassadors Events Past Events and Conferences Sponsor Sponsors List of Donors Blog About MariaDB Sponsors Governance Logos and Badges MariaDB Trademark Usage Statistics Service Providers Maintenance Policy Security Policy Download Learn Get Involved Social Media Getting Started for Developers MariaDB Contributor Agreement MariaDB Contributor Agreement FAQs Community Ambassadors Events Past Events and Conferences Sponsor Sponsors List of Donors Blog HomeGeneralMariaDB: InnoDB foreign key constraint errors MariaDB: InnoDB foreign key constraint errors 2015-08-07 4 Comments Written by Jan Lindstrom Introduction A foreign key is a field (or collection of fields) in one table that uniquely identifies a row of another table. The table containing the foreign key is called the child table, and the table containing the candidate key is called the referenced or parent table. The purpose of the foreign key is to identify a particular row of the referenced table. Therefore, it is required that the foreign key is equal to the candidate key in some row of the primary table, or else have no value (the NULL value). This is called a referential integrity constraint between the two tables. Because violations of these constraints can be the source of many database problems, most database management systems provide mechanisms to ensure that every non-null foreign key corresponds to a row of the referenced table. Consider following simple example: create table parent ( id int not null primary key, name char(80) ) engine=innodb; create table child ( id int not null, name char(80), parent_id int, foreign key(parent_id) references parent(id) ) engine=innodb; As far as I know, the following storage engines f

 

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