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foreign keys in mySql 1
- Thread starter Cristii00
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sleipnir214
Programmer
No, you don't. In fact, unless you are using InnoDB-type tables in MySQL version 3.23.44 and higher, they aren't supported.
Foreign keys, on database servers which support them, have nothing whatsoever to do with relating tables. What they do is constrain input with the intent of increasing data consistency.
Assume, for example, that column "foo" in table "a" has a foreign key constraint which points to column "bar" in table "b". What the constraint does it insure that the only value that can be inserted in "foo" is a value that already exists in "bar".
Take a look here for more information: ______________________________________________________________________
TANSTAAFL!
Foreign keys, on database servers which support them, have nothing whatsoever to do with relating tables. What they do is constrain input with the intent of increasing data consistency.
Assume, for example, that column "foo" in table "a" has a foreign key constraint which points to column "bar" in table "b". What the constraint does it insure that the only value that can be inserted in "foo" is a value that already exists in "bar".
Take a look here for more information: ______________________________________________________________________
TANSTAAFL!
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