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Need Help With SQL Query


Need Help With SQL Query

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darrylmybiz
darrylmybiz
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Have a table with a SSN column that is a float data type. My objective is to obtain the correct query to keep the column at 9 digits, change the data type from float to nvarchar and obtain the update query to make the change.

This is the SSN column before the my query:

SSN
020210101
100110010

Ran this query:

select dbo.ValidSSN(cast(SSN as bigint)), * from temp.__do_metro

Received this result after the query:

SSN
020200000000
100100000000
GilaMonster
GilaMonster
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What does the function ValidSSN do?

p.s. I hope SSN doesn't stand for social security number, because social security numbers should be stored encrypted if they're stored at all.


Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

We walk in the dark places no others will enter
We stand on the bridge and no one may pass


darrylmybiz
darrylmybiz
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SSN does stand for social security number. The company I work for receives encrypted medical data from companies. The SSN, name, address, etc. are fields used to verify members medical information. The several SSN's used in this example are fictitious.
Jeff Moden
Jeff Moden
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darrylmybiz (9/2/2012)
SSN does stand for social security number. The company I work for receives encrypted medical data from companies. The SSN, name, address, etc. are fields used to verify members medical information. The several SSN's used in this example are fictitious.


I guess the question here is, does the SSN ever appear in a non-encrypted form in your sstored data?

--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

Helpful Links:
How to post code problems
How to post performance problems
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dwain.c
dwain.c
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Perhaps ValidSSN is returning a masked version of the SSN?


My mantra: No loops! No CURSORs! No RBAR! Hoo-uh!

My thought question: Have you ever been told that your query runs too fast?

My advice:
INDEXing a poor-performing query is like putting sugar on cat food. Yeah, it probably tastes better but are you sure you want to eat it?
The path of least resistance can be a slippery slope. Take care that fixing your fixes of fixes doesn't snowball and end up costing you more than fixing the root cause would have in the first place.


Need to UNPIVOT? Why not CROSS APPLY VALUES instead?
Since random numbers are too important to be left to chance, let's generate some!
Learn to understand recursive CTEs by example.
Splitting strings based on patterns can be fast!
My temporal SQL musings: Calendar Tables, an Easter SQL, Time Slots and Self-maintaining, Contiguous Effective Dates in Temporal Tables
darrylmybiz
darrylmybiz
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Yes, the SSN appears in a non-encrypted form a database.
GilaMonster
GilaMonster
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I'd suggest you take that issue up with management, it's a risk.

Now, back to your original question, what is the definition of ValidSSN?


Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

We walk in the dark places no others will enter
We stand on the bridge and no one may pass


Jeff Moden
Jeff Moden
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darrylmybiz (9/3/2012)
Yes, the SSN appears in a non-encrypted form a database.


Heh.. that's cool. What company do you work for?

--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

Helpful Links:
How to post code problems
How to post performance problems
Forum FAQs
dwain.c
dwain.c
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Group: General Forum Members
Points: 4291 Visits: 6431
Jeff Moden (9/3/2012)
darrylmybiz (9/3/2012)
Yes, the SSN appears in a non-encrypted form a database.


Heh.. that's cool. What company do you work for?


I take it that you're asking this question so you can be sure you never appear in their database?


My mantra: No loops! No CURSORs! No RBAR! Hoo-uh!

My thought question: Have you ever been told that your query runs too fast?

My advice:
INDEXing a poor-performing query is like putting sugar on cat food. Yeah, it probably tastes better but are you sure you want to eat it?
The path of least resistance can be a slippery slope. Take care that fixing your fixes of fixes doesn't snowball and end up costing you more than fixing the root cause would have in the first place.


Need to UNPIVOT? Why not CROSS APPLY VALUES instead?
Since random numbers are too important to be left to chance, let's generate some!
Learn to understand recursive CTEs by example.
Splitting strings based on patterns can be fast!
My temporal SQL musings: Calendar Tables, an Easter SQL, Time Slots and Self-maintaining, Contiguous Effective Dates in Temporal Tables
Jeff Moden
Jeff Moden
SSC-Forever
SSC-Forever (45K reputation)SSC-Forever (45K reputation)SSC-Forever (45K reputation)SSC-Forever (45K reputation)SSC-Forever (45K reputation)SSC-Forever (45K reputation)SSC-Forever (45K reputation)SSC-Forever (45K reputation)

Group: General Forum Members
Points: 45518 Visits: 39948
Among other things not the least of which is that.

--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

Helpful Links:
How to post code problems
How to post performance problems
Forum FAQs
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