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Zath
Constraint Violating Yak Guru
298 Posts |
 Posted - 2007-10-10 : 16:07:15
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| If you create a field and it's a foriegn key, can it be null?For instance: LocationID INT, CONSTRAINT FK_LocationID_MyTable FOREIGN KEY (ID) REFERENCES Location (LocationID), So, if there is no locationID yet, would the record fail?Thanks,Zath |
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Kristen
Test
22859 Posts |
Posted - 2007-10-10 : 16:14:09
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| "If you create a field and it's a foriegn key, can it be null?"If you have a LocationID then a record must exist in Location.But LocationID IS NULL is valid (assuming that LocationID column allows NULLs)Kristen |
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Zath
Constraint Violating Yak Guru
298 Posts |
Posted - 2007-10-10 : 16:21:58
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| Yes, the field will allow nulls.So insert won't fail.Thanks,Zath |
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Foriegn Key and Null