HOW TO: Delete All Records From A Table Where A Child Record From Another Table Does Not Exist.

Mar 17, 2008

I need to delete all records in the TBL_PCL_LENS_DATA table that do not have a corresponding record in the TBL_VERIFICATION table.

Primary Table: TBL_PCL_LENS_DATA
PK: Serial Number
PK: ProcessedDateTime

Child Table: TBL_VERIFICATION
PK: Serial Number

Thanks,
Sean

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Hi thanks for looking at my question

Using sqlServer management studio 2005

My Tables are something like this:

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-- Table 2 "Branch"
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--Foreign IDs = FID
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Then I try a simple single row DELETE

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Well this might look like a very basic error:
I get this Error after trying to delete something from Table €œEmployee€?


The DELETE statement conflicted with the
REFERENCE constraint "FK_Branch_ManagerFID".
The conflict occurred in database "MyDatabase",
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Yes what I€™ve been doing is to deactivate the foreign key constraint, in both tables when performing these kinds of operations, same thing if I try to delete a €œBranch€? entry, basically each entry in €œbranch€? and €œEmployee€? is child of each other which makes things more complicated.

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