Scramble/Mixup SQL Records

Posted on 2009-07-06
Last Modified: 2013-11-15
Hi all,

I have been asked by the developers of our internal database program for a backup of our SQL database because they "lost" their copy of it. My bosses agreed to give them a copy of it but they worry what their true intentions are. I tried to get them to accept a small portion of it but they say they want the full copy to do stress testing, or so they claim. If we give them a shorter version, we worry that the service they provide will decline further in quality.

Any ideas as to how I can go about scrambling or mixing up the data? I realize this is a broad question since you don't know what my database looks like. There are too many tables to list and the relationships between tables are numerous. I would just like to hear people's thoughts on this, maybe there is an easy way I'm missing.

I can post some exmaple of the tables I would like to scramble if necessary.

Question by:PrimusPilus
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LVL 14

Expert Comment

ID: 24787897
What I have done in the past is make there copy of the database. That will be use by the Dev team.

Then run some sql that will change important data fields like salary.

using the RAND() funciton.

then backup that data and give it to them


Assisted Solution

rgc6789 earned 200 total points
ID: 24788101
Also make sure you "scramble" any contact info such as phone numbers, emails, etc. I dealt with a problem in the past where someone contacted all the clients via email.

Author Comment

ID: 24788481
Hi guys,

Thanks for your input!

I'm not sure if Rand will do what I need?  Below is an example (short example) of what I would like to change:
PeopleID            FirstName              LastName          Phone1                        Phone2                       Phone3

090909                Primus                     Pilus           416-555-5555              416-555-3333               416-555-4522
080808                 Gaius                     Marius         416-555-6666              416-555-4444               416-555-2332
070707                 Pompey                  Great          416-555-3333              416-555-2322               416-555-3421

So what I would like to do is have the entries in Phone1, Phone2, Phone3 mix matched so that Marius's numbers are now Pompey's numbers. I would also like to change the names around so that the names no longer match the PeopleID. This is because the database has a lot of tables that use the PeopleID as the key. Changing this around basically makes all the other data useless!

Am I able to use RAND to generate random phone numbers?

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LVL 14

Accepted Solution

Emes earned 300 total points
ID: 24788698
For the phone numbers just take the middle 3 digits and make it 555 like your sample
you could use the rand to do it too.

+'-'+ convert(varchar(4),convert(int,rand()*10000)

LVL 14

Expert Comment

ID: 24788739
here is a better code

Will take care of 2 digit numbers

  '-' +

You can do the same if you need an area code

Author Closing Comment

ID: 31600289
Thanks guys,

I ended up using RAND() and got most of the numbers randomly generated. The rest I simply duplicated!


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