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Novox
Starting Member
1 Post |
 Posted - 2007-06-26 : 07:47:03
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Hello.. I have a problem only on this relation (supertype and subtype) I have no idea how to create the table in MSSQL2000. I have try all the way that I can guess.. but unfortunately I can't solve this problem >,< I try to build it in diagram but can't.. in diagram I can create only normal relation.. would you please help or advise me some SQL code or the way to create it.. thank you in advance!  Supertype and Subtype ER-Diagram is below:  |
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pootle_flump
1064 Posts |
Posted - 2007-06-26 : 11:09:10
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| Do you mean you want to create a contraint so that a supertype can only be one subtype? |
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spirit1
Cybernetic Yak Master
11752 Posts |
Posted - 2007-06-26 : 12:09:32
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| if that's so you simply use check constraints on your column._______________________________________________Causing trouble since 1980blog: http://weblogs.sqlteam.com/mladenp |
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pootle_flump
1064 Posts |
Posted - 2007-06-26 : 13:27:04
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| Personally I prefer RI for efficiency. |
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how to create subtype tb by using this ER-Diagram?