Error Code 1701
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Cannot Truncate A Table Referenced In A Foreign Key Constraint In Mysql
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Truncate Table With Foreign Key Oracle
and ERROR 1305 errors in MySQL - Need some expertise up vote 3 down vote favorite 1 This is my first real crack at making a database in Third Normal Form. I managed to create the DDL script ok (I had the logical model verified to 3NF before I went ahead and built the script) but I get a whole lot of errors I am unsure
How To Remove Constraints In Mysql
of fixing. I may have bitten more than I can chew for this particular case but I don't want to give up - it's a big learning curve for me and with some help I can get past this and move on. First of all, here is my DDL script: -- This sql script creates the structure. -- of the rugby club database. DROP DATABASE IF EXISTS database_rugby; CREATE DATABASE database_rugby; USE database_rugby; -- Create the "coach" table. DROP TABLE IF EXISTS `database_rugby`.`coach` ; CREATE TABLE IF NOT EXISTS `database_rugby`.`coach` ( `coachID` INT(5) NOT NULL , `dateBeganCoaching` DATE NOT NULL , `personID` INT(5) NOT NULL , PRIMARY KEY (`coachID`)) ENGINE = InnoDB; -- Create the "grade" table. DROP TABLE IF EXISTS `database_rugby`.`grade` ; CREATE TABLE IF NOT EXISTS `database_rugby`.`grade` ( `gradeID` INT(5) NOT NULL AUTO_INCREMENT , `gradeName` VARCHAR(50) NOT NULL , `minWeight` INT(3) NOT NULL , `maxWeight` INT(3) NOT NULL , `minAge` INT(3) NOT NULL , `maxAge` INT(3) NOT NULL , `ballSize` INT(1) NOT NULL , PRIMARY KEY (`gradeID`) ) ENGINE = InnoDB; -- Create the "coachQualification" table. DROP TABLE IF EXISTS `database_rugby`.`coachQualification` ; CREATE TABLE IF NOT EXISTS `database_rugby`.`coachQualification` ( `qualID` INT(5) NOT NULL A
ERROR 1701 (42000): Cannot truncate set foreign_key_checks=0 incorrect syntax near '=' a table referenced in a foreign key constraint Explanation Due to that a table http://stackoverflow.com/questions/10258515/getting-error-1701-error-1452-and-error-1305-errors-in-mysql-need-some-expert is referenced in a foreign key constraint it isn’t possible to truncate the table. Solution It’s possible to disable the foreign key constraint check by adding SET FOREIGN_KEY_CHECKS=0; SET FOREIGN_KEY_CHECKS=0; https://tombevers.me/2013/10/14/how-to-truncate-a-foreign-key-constrained-table/ TRUNCATE table1; TRUNCATE table2; SET FOREIGN_KEY_CHECKS=1; The example works as follow: Disable the foreign key constraint check Truncate table1 Truncate table2 Enable foreign key constraint check again It’s not neccesarry to use SET FOREIGN_KEY_CHECKS=1; to enable the foreign key constraint check again as the setting is only valid during the connection. As soon as you disconnect, the next session will have it set back to 1. Comments Please enable JavaScript to view the comments powered by Disqus. comments powered by Disqus © 2014 Tom Bevers. Powered by Jekyll.
XT Hard Drive shows 1701 error on ROM low level format utility If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to http://www.vcfed.org/forum/showthread.php?22586-XT-Hard-Drive-shows-1701-error-on-ROM-low-level-format-utility register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. Page 1 of 3 123 Last Jump to page: Results 1 to 10 of 26 Thread: XT Hard Drive shows 1701 error on ROM low level format utility Thread Tools Show Printable Version Display Linear Mode Switch to Hybrid Mode Switch to foreign key Threaded Mode October 30th, 2010,07:21 PM #1 tezza View Profile View Forum Posts Private Message View Blog Entries Visit Homepage View Articles Senior Member Join Date Oct 2007 Location New Zealand Posts 4,448 XT Hard Drive shows 1701 error on ROM low level format utility Hi Guys, I got passed an IBM XT the other day and I'm just working on it. The hard drive will show a directory but foreign key constraint that's about all. I won't boot. Going into Debug g=C800:6 shows the message.. 1701 (20) 1 Hard Disk ..and then it hangs. I know 1701 is the POST error for hard disk parity failure. Can I assume the drive is toast? Tez ------------------------------------------------ My vintage collection: http://classic-computers.org.nz/collection/ My vintage activities blog: http://www.classic-computers.org.nz/blog/ Twitter: @classiccomputNZ ; YouTube Videos: (click here) Reply With Quote October 30th, 2010,09:03 PM #2 Chuck(G) View Profile View Forum Posts Private Message View Blog Entries View Articles Senior Member Join Date Jan 2007 Location Pacific Northwest, USA Posts 21,776 Blog Entries20 Tez, are you sure the hard drive matches what the BIOS thinks it is? A mismatch in the number of heads will cause the failure you describe. Reply With Quote October 30th, 2010,11:46 PM #3 tezza View Profile View Forum Posts Private Message View Blog Entries Visit Homepage View Articles Senior Member Join Date Oct 2007 Location New Zealand Posts 4,448 Not sure at all Chuck although it's the drive that was installed in the machine. Mind you, that doesn't necessarily means someone else didn't add it and failed to set the correct dip switches on the disk controller... I'll continue to investigate.... ------------------------------------------------ My vintage collection: http://classic-computers.org.nz/collection/ My vintage activities blog: http://www.classic-computers.org.nz/blog/ Twitter: @classi