FROM information_schema.table_constraints AS c
INNER JOIN information_schema.key_column_usage AS u
USING( constraint_schema, constraint_name )
WHERE c.constraint_type = 'FOREIGN KEY'
AND u.referenced_table_schema='db'
AND u.referenced_table_name = 'tbl'
ORDER BY c.table_schema,u.table_name; |
PB
Ok, I'm a little new a this, so be gentle!! :)
I was looking into the InnoDB engine for some tables I have, and would like
to use the PK/FK on some of the data.
It appears that the PK/FK is mainly used for updating/deleting data,
correct? I can't use it to retreive data from multiple tables
Hello Steve,
Ok, I'm a little new a this, so be gentle!! :)
I was looking into the InnoDB engine for some tables I have, and would
like
to use the PK/FK on some of the data.
It appears that the PK/FK is mainly used for updating/deleting data,
correct? I can't use it to retreive data from
I want to remove all records from 'feed_tag' where the feed_id foreign key
doesn't have any corresponding records in feed.
For instance I may have a record in feed_tag that is like (23, 10, 4543,
'... (some date)').
Then lets say there is no record in feed that has a primary id key of 10.
I
Hi Daevid
If you are using a foreign key you can set the reference as cascade
and when a row is deleted from feed it will be deleted from feed_tag.
http://dev.mysql.com/doc/refman/5.0/en/innodb-foreign-key-constraints.html
If you don't like it you can delete it easy with a query like
:
I want to remove all records from 'feed_tag' where the feed_id
foreign key
doesn't have any corresponding records in feed.
For instance I may have a record in feed_tag that is like (23, 10,
4543,
'... (some date)').
Then lets say there is no record in feed that has a primary id key
of 10
primary key.
My question pertains to referrerID. The referrerID specifies which OTHER
USER referred this new user. Thus it is a foreign key that links to a userID
in another user record. I do not recall ever linking attributes from the
same table (even for different records) so I have a hunch
HI,
What are the caution should be taken when designing a db regarding foreign key?
I have user table , from which userid is taken as reference in many
tables, is it ok?
--
Sharique uddin Ahmed Farooqui
(C++/C# Developer, IT Consultant)
http://safknw.blogspot.com/
Peace is the Ultimate thing we
Hi,
I thought that Falcon supported FKs, but in my test, it doesn't?
Can someone confirm this?
Martijn Tonies
Database Workbench - tool for InterBase, Firebird, MySQL, NexusDB, Oracle
MS SQL Server
Upscene Productions
http://www.upscene.com
My thoughts:
http://blog.upscene.com/martijn/
On Thu, Sep 20, 2007 at 11:20:19AM +0200, Martijn Tonies wrote:
I thought that Falcon supported FKs, but in my test, it doesn't?
Can someone confirm this?
The Falcon storage engine does not currently support foreign keys.
(The underlying engine does have support for them, but this
On Thu, Sep 20, 2007 at 11:20:19AM +0200, Martijn Tonies wrote:
I thought that Falcon supported FKs, but in my test, it doesn't?
Can someone confirm this?
The Falcon storage engine does not currently support foreign keys.
(The underlying engine does have support for them, but this
Hello All,
I just wanted to know whether there are any known issues in defining and using
Foreign key constraints in MySQL 4 and MySQL 5.
To be specific, are there any issues on using ON DELETE CASCADE and ON UPDATE
CASCADE?
Would there be any performance issues when we define Foreign key
I just wanted to know whether there are any known issues in defining and
using Foreign key constraints in MySQL 4 and MySQL 5.
To be specific, are there any issues on using ON DELETE CASCADE and ON
UPDATE CASCADE?
Would there be any performance issues when we define Foreign key
constraints?
We
I need some help. I am under presure from management to migrate and
existing Sybase ASA database to Mysql for a proof of concept.
I have done most of the work, but am having an issue creating a foreign
key. I keep getting the Can't create table './mysqk/#sql-d70_1f.frm'
(errno: 150) error. I
Hi Chris,
Chris Hoover wrote:
I need some help. I am under presure from management to migrate and
existing Sybase ASA database to Mysql for a proof of concept.
I have done most of the work, but am having an issue creating a foreign
key. I keep getting the Can't create table './mysqk/#sql
Here is the error from the show innodb status:
070523 15:39:39 Error in foreign key constraint of table mysql/#sql-d70_22:
FOREIGN KEY (tab_id, class) REFERENCES system_tabs(tab_id, class):
Cannot find an index in the referenced table where the
referenced columns appear as the first columns
Hi Chris,
Chris Hoover wrote:
Here is the error from the show innodb status:
070523 15:39:39 Error in foreign key constraint of table mysql/#sql-d70_22:
FOREIGN KEY (tab_id, class) REFERENCES system_tabs(tab_id, class):
Cannot find an index in the referenced table where the
referenced
Check the output of SHOW INNODB STATUS. You should see a more helpful
error message there.
This shows the following information:
LATEST FOREIGN KEY ERROR
070519 15:15:28 Error in foreign key constraint of table
woodturners/#sql-2dc_1e
Currently using MySQL version 5.0.22-community-nt on a Windows XP Pro box
(my development machine).
When I attempt to add a Foreign Key to one of my tables, I get the error,
Can't create table '.\woodturners\#sql-2dc_8.frm' (errno: 150). I have
checked through all of the standard issues
Hi Jesse,
Jesse wrote:
Currently using MySQL version 5.0.22-community-nt on a Windows XP Pro
box (my development machine).
When I attempt to add a Foreign Key to one of my tables, I get the
error, Can't create table '.\woodturners\#sql-2dc_8.frm' (errno: 150).
I have checked through all
I want contacts to have a 1-1 relation to px_items. I'm hesitant to add the
contact info onto px_items because http://www.feedonfeeds.com/ uses that
table.
from phpMyAdmin, how would I re-organize things pls? Or, must I manually enter
the SQL to establish the foreign key part?
Once I have
Hi to all,
I am a student, i am studing Mysql FOREIGN KEY for to
do a little progect, but i have this problem:
i create this table:
CREATE TABLE Cliente( codcliente VARCHAR(6) NOT NULL,
nome VARCHAR(10) NOT NULL,cognome VARCHAR(20) NOT
NULL, citta VARCHAR(10), indirizzo VARCHAR(20), tel
VARCHAR(7
Micol lupen wrote:
Hi to all,
I am a student, i am studing Mysql FOREIGN KEY for to
do a little progect, but i have this problem:
i create this table:
CREATE TABLE Cliente( codcliente VARCHAR(6) NOT NULL,
nome VARCHAR(10) NOT NULL,cognome VARCHAR(20) NOT
NULL, citta VARCHAR(10), indirizzo
Hi,
Micol lupen wrote:
FOREIGN
KEY(of_idvillaggio),REFERENCES villaggio(idvillaggio)
^^^ check here!
ON UPDATE CASCADE ON DELETE RESTRICT)ENGINE=INNODB;
No comma before REFERENCES. REFERENCES is part of the foreign key
definition.
regards
Nils
--
MySQL General
Still on the top of foreign keys :)
I have this statement:
ALTER TABLE `mytable`
ADD FOREIGN KEY ( `id` )
REFERENCES `othertable` ( `id` );
Is there a way I can give this key a specific name (eg 'FK_mytable_id') and
specific the type of reference (eg 'ON UPDATE CASCADE')?
--
View
Just found this added the name:
ALTER TABLE `mytable`
ADD FOREIGN KEY `fk_mytable_id` ( `id` )
REFERENCES `othertable` ( `id` );
I thought I had tried that - obviously not.
--
View this message in context:
http://www.nabble.com/Add-foreign-key-tf2950373.html#a8251427
Sent from the MySQL
And here are the matching drop and create statements:
ALTER TABLE `mytable`
DROP FOREIGN KEY `fk_mytable_id`;
ALTER TABLE `mytable`
ADD CONSTRAINT `fk_mytable_id`
FOREIGN KEY ( `id` )
REFERENCES `anothertable` ( `id` )
ON UPDATE CASCADE ON DELETE RESTRICT;
I don't know what I was doing
keys for MySQL
InnoDB Hot Backup - a hot backup tool for InnoDB which also backs up
MyISAM tables
http://www.innodb.com/order.php
.
From: Mungbeans Date: January 2 2007 12:56am
Subject: Deleting Foreign Key
Get Plain Text
I have a foreign key in a table which I need to drop. I have
Mungbeans wrote:
ALTER TABLE `mytable` DROP FOREIGN KEY `keyname`
#1025 - Error on rename of '.\database\mytable' to '.\database\#sql2-6ec-11'
(errno: 152)
ALTER TABLE `mytable` DROP INDEX `keyname`
#1025 - Error on rename of '.\database\#sql-6ec_13' to '.\database\mytable'
(errno: 150
Oh
Chris White-4 wrote:
Moving along... what I do first is SHOW
CREATE TABLE `table_name`:
...snipped...
So, first you remove the key:
ALTER TABLE table_name DROP KEY `key_column`;
then the foreign key:
ALTER TABLE table_name DROP FOREIGN KEY `table_name_ibfk_1`;
...snipped...
Thank
I have a foreign key in a table which I need to drop. I have successfully
dropped other foreign keys from this table using phpMyAdmin. However when I
use these commands I get similar error messages:
ALTER TABLE `mytable` DROP FOREIGN KEY `keyname`
#1025 - Error on rename of '.\database
I am not an expert in this, but it looks as though you are trying to define
foreign keys on your parent table. I thought you had to define the parent
table without foreign keys, and then define a child table with foreign key
constraints.
I'm also not sure if you are trying to redefine the key
`),\n
KEY `demo_employee_FKIndex3` (`demo_biz_role_idbiz_role`),\n KEY
`demo_employee_FKIndex4` (`demo_job_idjob`),\n KEY `demo_employee_FKIndex5`
(`demo_user_iduser`),\n CONSTRAINT `demo_employee_ibfk_1` FOREIGN KEY
(`demo_mandt_idmandt`) REFERENCES `demo_mandt` (`idmandt`) ON DELETE CASCADE
Hello list,
I'm pretty new here.
But i already got an problem. I'm working a while with mysql currently
i'm trying to duplicate some entries in my tables.
The problem is, i'm using foreign key constraints between those tables
and i also would like to duplicate the childs.
So i got one big parent
@lists.mysql.com
Subject: Copy some datasets including the foreign key constraints
Hello list,
I'm pretty new here.
But i already got an problem. I'm working a while with mysql currently
i'm trying to duplicate some entries in my tables.
The problem is, i'm using foreign key constraints between those
Hello,
How can I find the foreign keys for a table? I would like to be able
to find, for any table, the columns that are foreign keys and what
tables/columns the foreign keys are related to. Basically what I am
trying to do is this. My developers want to allow logical deletes of
data. I don't
wrote:
show create table tablename?
-Original Message-
From: Clyde Lewis [mailto:[EMAIL PROTECTED]mailto:[EMAIL PROTECTED]
Sent: Tue 11/14/2006 10:16 AM
To: MySQL List
Subject: Find foreign key for a table
Hello,
How can I find the foreign keys for a table? I would like to be able
To: MySQL List
Subject: Find foreign key for a table
Hello,
How can I find the foreign keys for a table? I would like to be able
to find, for any table, the columns that are foreign keys and what
tables/columns the foreign keys are related to. Basically what I am
trying to do is this. My developers
Clyde,
How can I find the foreign keys for a table?
At http://www.artfulsoftware.com/mysql-queries.php in the left pane
click on DDL then on 'Find parent tables'. HTH.
PB
-
Hello,
How can I find the foreign keys for a table? I would like to be able
to find, for any table, the
To: Clyde Lewis
Cc: MySQL List
Subject: Re: Find foreign key for a table
Clyde,
How can I find the foreign keys for a table?
At http://www.artfulsoftware.com/mysql-queries.php in the left pane click on
DDL then on 'Find parent tables'. HTH.
PB
-
Hello,
How can I find the foreign keys
Alle 14:04, giovedì 9 novembre 2006, Heikki Tuuri ha scritto:
Giorgio,
InnoDB only implements MATCH SIMPLE. MySQL/InnoDB ignores the MATCH
clause that you specify in the foreign key constraint definition.
Thanks a lot :-)
Giorgio
--
MySQL General Mailing List
For list archives: http
Giorgio,
InnoDB only implements MATCH SIMPLE. MySQL/InnoDB ignores the MATCH
clause that you specify in the foreign key constraint definition.
http://www.contrib.andrew.cmu.edu/~shadow/sql/sql1992.txt
A referential constraint is satisfied if one of the following con
that are done during insertion into a
referencing table.
So they can be implemented by a simple check which is to be done at the
beggining of the trigger which is responsible for processing of a foreign key
check on insertion:
* if the match type is SIMPLE and one or more foreign key columns in the row
that are done during insertion into a
referencing table.
So they can be implemented by a simple check which is to be done at the
beggining of the trigger which is responsible for processing of a foreign key
check on insertion:
* if the match type is SIMPLE and one or more foreign key columns in the row
TABLE `cardfaces` ADD CONSTRAINT `fk_card_deck` FOREIGN KEY
(`card_id`) references card(`id`);
ALTER TABLE `cards` ADD CONSTRAINT `fk_card_deck` FOREIGN KEY
(`deck_id`) referencesdeck(`id`);
ALTER TABLE `decks` ADD CONSTRAINT `fk_deck_cardtype` FOREIGN KEY
(`cardtype_id` REFERENCES cardtypes(`id
James, you may have a typo in your SQL, actually in the the frst two
ALTER TABLE statements. You posted:
ALTER TABLE `cardfaces` ADD CONSTRAINT `fk_card_deck` FOREIGN KEY
(`card_id`) references card(`id`);
ALTER TABLE `cards` ADD CONSTRAINT `fk_card_deck` FOREIGN KEY
(`deck_id`) referencesdeck
` (`topic_cd_id`),
UNIQUE KEY `r180_student_idx_04` (`user_id`),
CONSTRAINT `0_3834` FOREIGN KEY (`topic_cd_id`) REFERENCES
`r180_topic_cd` (`topic_cd_id`) ON DELETE RESTRICT,
CONSTRAINT `0_3836` FOREIGN KEY (`user_id`) REFERENCES `ic_user`
(`user_id`) ON DELETE CASCADE
) TYPE=InnoDB COMMENT
On Wed, 2006-07-26 at 08:58 -0400, Jesse wrote:
I am trying to add a foreign key to one of my tables. When I execute the
following SQL Code:
ALTER TABLE `bpa`.`confinvitems` ADD CONSTRAINT `FK_confinvitems_1` FOREIGN
KEY `FK_confinvitems_1` (`InvDetID`)
REFERENCES `confinvdet` (`ID
By that I hope you mean there is an index on confinvitems.InvDetID _and_
confinvdet.ID
Yes, there is.
Could be a record in confinvitems that has an InvDetID that doesn't
exist in ConfInvDet. Check with something like:
SELECT InvDetID FROM confinvitems WHERE InvDetID NOT IN (SELECT ID FROM
I'm still unsure about foreign keys..even after reading the doc file and
Paul Dubois 3rd edition
My doubt is...how much constraint is applied.( probably a bad
explanation)
If i have a table 'Customers' with the primary key being 'CustID'
Then i have a table 'LastVisit' with a foreign key
' with a foreign key 'CustID'
btw...i have a Form-SubForm in OO that i'm working with where i have the 2
tables linked
should the foreign key 'LastVisit.CustID' only allow values that are in the
linked primary field? or will it allow any value that is in the table '
Customers.CustID' ?
When i enter
I am trying to add a foreign key to one of my tables. When I execute the
following SQL Code:
ALTER TABLE `bpa`.`confinvitems` ADD CONSTRAINT `FK_confinvitems_1` FOREIGN
KEY `FK_confinvitems_1` (`InvDetID`)
REFERENCES `confinvdet` (`ID`)
ON DELETE CASCADE;
I get the error:
MySQL Error Number
Hi,
Is this a InnoDB table.
Thanks Regards
Dilipkumar
- Original Message -
From: Jesse [EMAIL PROTECTED]
To: MySQL List mysql@lists.mysql.com
Sent: Wednesday, July 26, 2006 6:28 PM
Subject: Adding Foreign Key Fails
I am trying to add a foreign key to one of my tables. When I
Is this a InnoDB table.
Yes, sorry, I should have mentioned that. The rest of my tables are MyISAM,
and I discovered that it does not support Foreign Keys. So, I converted
these tables to InnoDB so that I can put the Foreign Keys in.
Thanks,
Jesse
--
MySQL General Mailing List
For list
I'm using MySQL 5 with InnoDB tables. I'm trying to create a foreign key,
but when I try, it's giving me an error. I've tried this with the
MySQLQuery Browser, and EMS SQL Manager 2005. I get the following error in
the Query Browser:
Error while executing query.
ALTER TABLE `karate
Jesse, a stab in the dark here, with some info from the manual.
A foreign key constraint is in My Code erroneously coded,
If MySQL gives the error number 1005 from a CREATE TABLE
statement, and the error message string refers to errno 150, then
the table creation failed because a foreign key
line, eliminating the reference to the
karate database, and got the same error.
I tried the SHOW INNODBSTATUS. I did find something in there that may hint
at the problem:
060719 14:07:40 Error in foreign key constraint of table karate/#sql-304_12:
FOREIGN KEY FK_custpoints_1 (CTID)
REFERENCES
On Wednesday 19 July 2006 10:25 am, Jesse wrote:
MySQL Error Number 1005
Can't create table '.\karate\#sql-304_9.frm' (errno: 150)
KEY `FK_custpoints_1` (`CTID`)
REFERENCES `custtournaments` (`ID`)
can you show us the column declarations for these two?
Any idea why this is happening, and
[EMAIL PROTECTED]
To: mysql@lists.mysql.com
Sent: Wednesday, July 19, 2006 2:33 PM
Subject: Re: Error when creating Foreign Key
On Wednesday 19 July 2006 10:25 am, Jesse wrote:
MySQL Error Number 1005
Can't create table '.\karate\#sql-304_9.frm' (errno: 150)
KEY `FK_custpoints_1` (`CTID
On Wednesday 19 July 2006 01:07 pm, Jesse wrote:
`ID` int(10) unsigned NOT NULL auto_increment,
`CTID` int(11) NOT NULL,
the storage types aren't the same. change CTID to INT(10) UNSIGNED NOT NULL
and it should work.
--
Chris White
PHP Programmer/DBank
Interfuel
--
MySQL General
HI,
I previously tried this same question on the GUI tool list, but not much
traffic there, so I thought I'd give it a go here.
I've been reading some articles that suggest I should be able to create a
relationship on a MyISAM table, it would be great if someone could confirm
or deny this.
Hello Taco,
I previously tried this same question on the GUI tool list, but not much
traffic there, so I thought I'd give it a go here.
I've been reading some articles that suggest I should be able to create a
relationship on a MyISAM table, it would be great if someone could confirm
or deny
, this is true - you can create columns with values that
point to other tables.
What you probably are asking, is if you can referential integrity
constraints.
The answer, for MyISAM tables, is NO.
Currently foreign key constraints only work for InnoDB tables. We're
working making foreign keys table
. (that is trying to be used to
establish the FOREIGN KEY definitions)
Here is the output of the mysql client:
mysql SHOW CREATE TABLE friends\G
*** 1. row ***
Table: friends
Create Table: CREATE TABLE `friends` (
`id` smallint(5) unsigned NOT NULL
Hello Andreas,
You're not telling us what version of MySQL you're using,
so I'll have to give it a shot in the dark ...
mysql SHOW CREATE TABLE friends\G
*** 1. row ***
Table: friends
Create Table: CREATE TABLE `friends` (
`id`
(5) unsigned NOT NULL,
* KEY `idx` (`idx`),
KEY `id` (`id`),
CONSTRAINT `relation_ibfk_1` FOREIGN KEY (`idx`) REFERENCES `friends`
(`id`),
CONSTRAINT `relation_ibfk_2` FOREIGN KEY (`id`) REFERENCES `friends`
(`id`)
*) *ENGINE=InnoDB* DEFAULT CHARSET=latin1
1 row in set (0.00 sec)
Defining
failing instruction:
*mysql SHOW INNODB STATUS;*
...
LATEST FOREIGN KEY ERROR
060312 13:40:40 Transaction:
TRANSACTION 0 7440, ACTIVE 0 sec, OS thread id 3048 inserting, thread
declared
nside InnoDB 499
mysql tables in use 2, locked 2
6 lock struct(s
Thanks Michael, that' s the problem. Syntactically my attempt was
correct. Only I had the *value '1' in the only row that table
`friends`contains, whereas table `category`was still empty*. (I was
about creating the database for sample purposes.) When I tried to create
the FOREIGN KEY out
I'm trying to create foreign key constraints and keep getting an error
message 1005 (I did look it up, but didn't see an obvious solution to
fixing this for my database).
The version I'm using is 5.0.17-max. I used Mysql WorkBench to create
the database schema and had it generate the sql
Lola J. Lee Beno wrote:
I'm trying to create foreign key constraints and keep getting an error
message 1005 (I did look it up, but didn't see an obvious solution to
fixing this for my database).
The version I'm using is 5.0.17-max. I used Mysql WorkBench to create
the database schema
Michael Stassen wrote:
1) I'm not sure what you are intending with (`(not null)`) in the
middle of your foreign key definition, but that isn't valid mysql
syntax. See the manual for the correct syntax
http://dev.mysql.com/doc/refman/5.0/en/innodb-foreign-key-constraints.html.
This is from
` DATETIME NULL,
PRIMARY KEY (`FilmID`),
CONSTRAINT `FK_RatingID` FOREIGN KEY `RatingID` (`(not null)`)
REFERENCES `ows`.`FilmsRatings` (`RatingID`)
ON DELETE CASCADE
ON UPDATE CASCADE
)
ENGINE = InnoDB
CHARACTER SET utf8 COLLATE utf8_general_ci;
And got
Peter Brawley wrote:
Lola,
/And got this following error message:
ERROR 1072 (42000): Key column '(not null)' doesn't exist in table
/
Yes, it's telling you what;s wrong: to define a constraint on a key, the
table def must first define the key.
Looking over the script again, RatingID is
` LONGTEXT NULL,
`ImageName` VARCHAR(50) NULL,
`DateInTheaters` DATETIME NULL,
PRIMARY KEY (`FilmID`),
CONSTRAINT `FK_RatingID` FOREIGN KEY `RatingID` (RatingID)
REFERENCES `FilmsRatings` (`RatingID`) ON DELETE CASCADE
ON UPDATE
Gleb Paharenko wrote:
Hello.
The query which is works is:
Thanks - just what I needed. Looks like I'll need to be extra careful
with sql scripts generated from Mysql Workbench, which is still alpha
right now.
--
Lola - mailto:[EMAIL PROTECTED]
http://www.lolajl.net | Blog at
Hello.
You can post a bug:
http://dev.mysql.com/doc/refman/5.0/en/bug-reports.html
Lola J. Lee Beno wrote:
Gleb Paharenko wrote:
Hello.
The query which is works is:
Thanks - just what I needed. Looks like I'll need to be extra careful
with sql scripts generated from Mysql
using InnoDB. I use MySQL Administrator and InnoDB is what
it says all my tables are already using so it must have chosen
that by default or something. Does this mean that I shouldn't
have been able to delete records from my schedules table above
that had a foreign key in the registration table
tables are already using so it must have chosen that by
default or something. Does this mean that I shouldn't have been
able to delete records from my schedules table above that had a
foreign key in the registration table? Thanks.
Ferindo
Paul,
I discovered that this foreign key constraint
Administrator and InnoDB is what
it says all my tables are already using so it must have chosen
that by default or something. Does this mean that I shouldn't
have been able to delete records from my schedules table above
that had a foreign key in the registration table? Thanks.
Ferindo
Paul
. Does this mean that I shouldn't have been able
to delete records from my schedules table above that had a foreign
key in the registration table? Thanks.
Ferindo
Paul,
I discovered that this foreign key constraint wasn't present in these
tables anymore due to my own action. You see, I had
so it must have chosen that
by default or something. Does this mean that I shouldn't have been
able to delete records from my schedules table above that had a
foreign key in the registration table? Thanks.
Ferindo
Paul,
I discovered that this foreign key constraint wasn't present
I have two tables, registration schedules, that look like this:
CREATE TABLE registration (
idSERIAL NOT NULL UNIQUE,
firstnameVARCHAR(256) NOT NULL,
middlenameTEXT,
At 17:56 -0500 1/28/06, Ferindo Middleton Jr wrote:
I have two tables, registration schedules, that look like this:
CREATE TABLE registration (
idSERIAL NOT NULL UNIQUE,
firstnameVARCHAR(256) NOT NULL,
records from my schedules table above that had a foreign key in the
registration table? Thanks.
Ferindo
--
MySQL General Mailing List
For list archives: http://lists.mysql.com/mysql
To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
shouldn't have been able
to delete records from my schedules table above that had a foreign key
in the registration table? Thanks.
Ferindo
Paul,
I discovered that this foreign key constraint wasn't present in these
tables anymore due to my own action. You see, I had backed up my
database before
Hi jesse,
You can only set the reference in your constraint:
... ADD FOREIGN KEY (id) references table(id) ...
In this case you will get an inconsistent database. Dont reference the
two tables Campers and Counselers with the ActivitySelections table, but
use two tables in which you put
, December 27, 2005 6:27 AM
Subject: Re: Foreign Key with constant?
Hi jesse,
You can only set the reference in your constraint:
... ADD FOREIGN KEY (id) references table(id) ...
In this case you will get an inconsistent database. Dont reference the two
tables Campers and Counselers
I need to be able to add a foreign key that will allow a constant is
possible.
I have a table named Campers that has a field named ID. I also have another
table called Counselors that has a field named ID as well. There is a
detailed table called ActivitySelections that I use for both
I am trying to add referential integrity to my database. I'm trying to add
a foreign key reference to one of my tables, but I'm getting an error when I
try to do so. Here's what I'm executing:
ALTER TABLE Campers ADD CONSTRAINT FK_Activities FOREIGN KEY FK_Activities
(ID)
REFERENCES
Jesse [EMAIL PROTECTED] wrote on 12/22/2005 02:51:21 PM:
I am trying to add referential integrity to my database. I'm trying to
add
a foreign key reference to one of my tables, but I'm getting an error
when I
try to do so. Here's what I'm executing:
ALTER TABLE Campers ADD CONSTRAINT
]
To: Jesse
Cc: mysql@lists.mysql.com
Sent: Thursday, December 22, 2005 3:00 PM
Subject: Re: Foreign Key Help
Jesse [EMAIL PROTECTED] wrote on 12/22/2005 02:51:21 PM:
I am trying to add referential integrity to my database. I'm trying to add
a foreign key reference to one of my
I see,
Thanks for information, yes correct this NO ACTION is confusing me.
BTW, congratulation for your new email @oracle.com :D
Heikki Tuuri wrote:
Ady,
NO ACTION actually means the same as RESTRICT. That is, the foreign
key constraint is still enforced. The name 'NO ACTION' is from
','FALSE') default 'FALSE',
`push_operator` varchar(30) NOT NULL default '',
`push_unsubscribe_reason` text NOT NULL,
PRIMARY KEY (`push_member_id`),
KEY `t_push_member_unsub_ibfk_1` (`push_keycode`),
CONSTRAINT `t_push_member_unsub_ibfk_1` FOREIGN KEY (`push_keycode`)
REFERENCES `t_keycode
Ady,
NO ACTION actually means the same as RESTRICT. That is, the foreign key
constraint is still enforced. The name 'NO ACTION' is from the SQL standard.
I agree that the name is confusing, but I cannot help it, because it is in
the standard.
Regards,
Heikki
Oracle/Innobase
- Original
` as PK
I want to have a 3rd innoDb table:
countrylang with `cid,lang` as compound key with both `cid` and `lang` as
foreign (cascade-delete) keys to the master tables.
However mysql throws error (Cannot create table..) when I try to define
`cid` as a foreign key to country.id
..) when I try to define
`cid` as a foreign key to country.id
country.id and countrytext.cid are both smallint(5)
Any help?
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Hi Guy,
Use SHOW INNODB STATUS and check foreign key error at there
Good luck
Guy Brom wrote:
I have the following innoDb tables:
country has `id` as PK
lang has `id` as PK
I want to have a 3rd innoDb table:
countrylang with `cid,lang` as compound key with both `cid` and `lang`
as foreign
hello,
does anybody knows the error:
can't create table '.\Cherry\#sql-288_5d.frm'
(errno:150)
it happens when i try to create foreign keys in
Table1, and that foreign key is actually primary key
in Table2 (to which i relate my foreign key)
Thanx a lot!
Tatjana
Tatjana Cukic [EMAIL PROTECTED] wrote on 10/12/2005 12:28:47 PM:
hello,
does anybody knows the error:
can't create table '.\Cherry\#sql-288_5d.frm'
(errno:150)
it happens when i try to create foreign keys in
Table1, and that foreign key is actually primary key
in Table2 (to which i
Hi,
I had asked similar question few days ago, and then checked with
the developers as no one was able to answer on this mailing list.
I was told it is very likely we'll get it in 5.2.
Jacek
Sujay Koduri wrote:
does anyone have an idea when mysql guys are going to include foreign key
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