Question

Verification of Data conversion

Asked by: Evertrue

Advice please.

We had a legacy system with between 3-4 databases (flat file) that recently converted to an sql database.  Now we need to verify that all the data has been imported into the new database.

Is there a way other than going line by line since it is close to 300,000 records to verify that all the data made it over ?

Can someone elaborate on different techniques, software or give advice how we might verify all this data ?

thanks in advance!

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Asked On
2009-09-09 at 15:30:12ID24719832
Tags

database

,

data

,

verify

,

conversion

Topics

PostgreSQL Database

,

Disaster Recovery

,

Data Manipulation

Participating Experts
2
Points
500
Comments
7

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Answers

 

by: leakim971Posted on 2009-09-09 at 15:40:08ID: 25296211

Hello,

You need to to count line in each flat file with, for example a vb script :
http://www.microsoft.com/technet/scriptcenter/resources/qanda/oct04/hey1012.mspx

You could easily count number of line in a table :

SELECT COUNT(*) FROM TABLE;

Regards.

 

by: EvertruePosted on 2009-09-09 at 15:54:29ID: 25296275

I thought about that the only problem is:

for example
ff = flatfile db

ff1, ff2 and ff3 might all go in 1 table in the sql db
part of ff4, ff5 and ff6 in another and so on.

 

by: leakim971Posted on 2009-09-09 at 15:59:53ID: 25296296

How many ff have you ?

 

by: EvertruePosted on 2009-09-09 at 16:29:53ID: 25296440

There were 8-10 database files and we have converted this into a sql database

 

by: leakim971Posted on 2009-09-09 at 16:40:26ID: 25296483

OK so just run 8 at 10 time the script.
Sum the results to have total of line and compare with the result returned by SELECT COUNT(*) FROM SQLTABLE;

Regards.

 

by: earthman2Posted on 2009-09-10 at 00:03:54ID: 25297864

extract data from both databases into same format in two text files.

Use diff(Unix) fc(windows) to compare differences between files.

Segment data using some criteria to reduce size of comparison.

 

by: EvertruePosted on 2009-09-16 at 11:39:46ID: 31626872

n/a

20120131-EE-VQP-002

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