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Make sure a database is clean for a specific ID

Posted on 2012-04-07
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Last Modified: 2012-04-08
Dear experts,

I'm building an administration system in Classic ASP, and that include profiles.

Now I have a lot of profiles, and some IDs are registered in several tables.

If I delete a profile on the member's list (table1), I will do like this:

        DeleteProfileSQL = "DELETE FROM [table1] WHERE [id] = " & Request.QueryString("id")
        Conn.Execute(DeleteProfileSQL)

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...and that profile will be deleted in the table1!
But the ID of that person may be registered in other tables as well.

How do I make sure that when the record is deleted in table1, following will also happen:

In table2: Only update the existing record (remove the profile's ID)
In table3: Find all the records with the deleted profile's ID and delete the rows containing the profiles ID.

It will also occur that the deleted ID in table1 doesn't exist in any other tables.

Thanks in advance!!

/DanishCoder
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Question by:DanishCoder
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4 Comments
 
LVL 17

Accepted Solution

by:
ramrom earned 300 total points
ID: 37820234
UpdateProfileSQL = "UPDATE [table2] SET [id] = 0 WHERE [id] = " & Request.QueryString("id")
Conn.Execute(UpdateProfileSQL 
DeleteProfileSQL = "DELETE FROM [table3] WHERE [id] = " & Request.QueryString("id")
Conn.Execute(DeleteProfileSQL

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I am guessing that when you say "remove the profile's ID" you mean to set it = 0. If you have a different intention let me know.
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LVL 52

Assisted Solution

by:Scott Fell, EE MVE
Scott Fell,  EE MVE earned 200 total points
ID: 37820237
As long as you know your record layout for each table, you just add more delete statements.

If you have a contacts table with ID, Name, Address and Employee Table with ID, ContactID, Department and you want to delete all records for a specific contact, then you would delete using the contactID in the contacts table, then do another delete statement this time using the ContactID in the Employee Table.



<%

ProfileID =Request.QueryString("id")

DeleteProfileSQL = "DELETE FROM [table1] WHERE [id] = " & ProfileID
        Conn.Execute(DeleteProfileSQL)

DeleteProfileSQL = "DELETE FROM [table2] WHERE [somefield] = " & ProfileID 'somefield is the field where you will find the related id
        Conn.Execute(DeleteProfileSQL)

DeleteProfileSQL = "DELETE FROM [table3] WHERE [somefield] = " & ProfileID 'somefield is the field where you will find the related id
        Conn.Execute(DeleteProfileSQL)

%>
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LVL 17

Expert Comment

by:ramrom
ID: 37821236
OP said "In table2: Only update the existing record (remove the profile's ID)"

Other than that our solutions seem to be the same.
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Author Comment

by:DanishCoder
ID: 37821808
@ramrom
Yes, seems like that was what I was looking for - I just didn't know if there was a better or quicker solution. What I have is:

1. A member table, where the profile is registered, its ID is used in the group table, and volunteer table.
2. A group table, where I need to update the member's ID to 0 or '' when not entered (the group doesn't disappear because a profile in the member's table is deleted).
3. A volunteer table, where I would need to delete the row containing the member's ID

@padas
In this situation I know the table structure, and I suppose you will always know that, as you are the one who builds the table structure - and as ranrom said, both solutions seems to be the same.


Thanks for your time and expertise :)
DanishCoder
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