TARGET_RDBMS: MySQL-5.X-InnoDB (\"X\" equals current stable release) BACKGROUND: Building my first database with true referential integrity constraints, in an effort to get feedback, after creating t
UPDATE: \"Setting foreign_key_checksto 1 does not trigger a scan of the existing table data. Therefore, rows added to the table while foreign_key_checks = 0 will not be verified for consistency.\" SOU
In the following table, is there a way to ensure PreviousID always references an ID in a row with a matching ParentID, or, if ParentID is null, it is also null in the referenced row?
I need to figure out some clever MySQL snippet that will allow me to easily see two tables, the ids in the table if they exist or NULL or empty if they don\'t exist.
In my process, I do something like: SET FOREIGN_KEY_CHECKS = 0; LOAD DATA INFILE \'/path/to/mytable.txt\' INTO TABLE mytable;
Maybe i\'m going about this wrong but my working开发者_Python百科 on a database design for one of my projects.
Maybe I\'m not seeing the forest for the trees, but here it goes: I\'m \"designing\" an XML document and have so far come up with something like the following:
One of the reasons why referential integrity should not be enforced is performance. Because Db has to validate all updates against relationships, it just makes things slower but what are the other pro
So, I just came across the fact that rails does not support referential integrity regarding foreign keys and was fairly surprised. So, what\'s the best way to manage this? Is there a \"rails\" way for
My situation may be a bit abnormal, but I have foreign keys defined in my MySQL database, while enforcing referential integrity in the Zend_Db_Table classes.The tables use theInnoDB storage engine.
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