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08/30/2005 at 02:42PM PDT, ID: 21545524
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7.6

Relationship Error Message - Quick Question Needs Quick Guru Answer

Asked by dudubravo in MS SQL Server

Tags: conflicted, constraint, delete

Here's nice question for that Guru to show me who the man is:

I got my ASP.NET app in C#. I have my SQL Server database with my tables and SPs.

My tables have relationships.

You know those options in SQL server, when you have your diagram, and you want to
set up a relationship that:

"Cascade Update Related Fields"
"Cascade Delete Related Fields"

I know what they are for just like you, but I have a small problem...

Let's suppose I'm using the Query Analyzer, and I want to delete a record in one table,
but this record is referenced in another table (and these two table have a one-to-many relationship).

Well, if I had checked off the "Cascade Delete Related Fields", then when I delete a
record on "Table 1", all the records associated on "Table 2" are deleted as well. Cool.

But let's say that I don't have it checked off, and I try to do the same thing...

Well, then I get:

"DELETE statement conflicted with COLUMN REFERENCE constraint 'FK_Tag_Orientation'. The conflict occurred in database 'Robot', table 'Tag', column 'ORI_ID'. The statement has been terminated."

which is great because SQL Server is reinforcing it the relationship and it won't allow me to delete the record that I want in "Table 1" *before* I delete all the associated records in "Table 2".

So far so good.

Now, how can I "test" for this without having to use a try/catch to learn about it?

In other words, how can I intelligently program a friendly SP to tell about this?
[+][-]08/30/05 02:48 PM, ID: 14789343

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[+][-]08/30/05 03:35 PM, ID: 14789571

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[+][-]08/30/05 05:50 PM, ID: 14790099

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[+][-]08/30/05 06:10 PM, ID: 14790167

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[+][-]08/30/05 06:38 PM, ID: 14790263

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[+][-]08/31/05 02:47 PM, ID: 14798087

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About this solution

Zone: MS SQL Server
Tags: conflicted, constraint, delete
Sign Up Now!
Solution Provided By: AlphaMan74
Participating Experts: 2
Solution Grade: A
 
 
[+][-]08/31/05 02:51 PM, ID: 14798126

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[+][-]09/03/05 06:38 AM, ID: 14816065

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