A declarative mechanism such as a check or foreign key that enforces some data integrity rule in a database.
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Dealing with Invisible Referencers
Using Oracle database, suppose I have a parent table parent defined in schema A, and a child table child defined in schema B. To achieve this, schema A granted references privilege on parent to schema ...
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Defacto way of fixing constraint issues without downtime?
I come across two constraint issues all the time (UNIQUE, and referential integrity constraints) within InnoDB. My question is when these issues arise reproducibly what is typically the solution? I'm ...
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information_schema.table_constraints doesn't exist error in MySQL
I'm new to this and Googling didn't help me with this one. I'm trying to check whether a foreign key constraint already exists like this:
$sql = 'SELECT `constraint_name`, `table_name` FROM ...
