Let\'s say I have 3 tables, \"child1\", \"child2\" and \"child3\", that all have a foreign key to the table \"parent\".
I have 3 table: A,B and C. Relations are: A->B 1:1 A->C 1:n Table A is the main table: CREATE TABLE IF NOT EXISTS `A` (
I have been struggling with defining cascade behavior in Doctrine ORM. According to the documentation, one is supposed to use onDelete: CASCADE for database-level cascade (which is what I am trying t
I am having trouble deleting orphan nodes using Hibernate with the following mapping @OneToMany(fetch = FetchType.LAZY, mappedBy = \"seizure\",orphanRemoval=true)
I am working on a project that makes use of a MySQL Database to store snippets of code for use on multiple websites. For each content snippet I also keep an edit history table, to which I add a record
I have a postgresql database with about 150 tables(it\'s a Django 1.2 project). Django adds ON DELETE NO ACTION and ON UPDATE NO ACTION to foreign keys at the time of table creation.
I need to delete some SQL Azure database entries, and I\'m not sure if the casca开发者_如何转开发de on delete is specified or not. If I by accident delete something important, I\'m in a world of hurt.
Let\'s say I have a row in Table A I wish to delete but there a multiple foreign key constraints in other tables. Is there a way to automatically generate the delete command?
Hi I am using mysql5 innoDB database. I want to开发者_如何转开发 forcefully delete data from parent row and its related child table data\'s. How can I do that. Any one can help me.If you use innodb yo
What is the proper开发者_运维问答 way to delete rows from several tables in one query? The reason I ask is because I am doing this with PHP.If I use multiple queries to delete from each table one at
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