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Results tagged with Search options user 7024

A type of integrity constraint used in a RDBMS platform to ensure that a value in a column matches one of a range of key values from another table.

1
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Instead of object_id and object_type columns, why not use a primary key for each object type to be commented on, but maintain the object_type (for partitioning later) so that you have question_id, com …
answered Jul 7 '12 by Stephen Senkomago Musoke
1
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Foreign key relationships are to enforce data integrity, not for query performance, that is what indexes are for. Also note that InnoDB creates an index on each column with a foreign key relationship. …
answered Jun 23 '12 by Stephen Senkomago Musoke