TSQL Challenge 47 - Read the modification history and identify the first and last card numbers
A table contains the list of modifications made to each card. Your job is to write a query that shows the first number, current number (most recent) and the number of changes made.
http://beyondrelational.com/blogs/tc/archive/2011/01/10/tsql-challenge-47-read-the-modification-history-and-identify-the-first-and-last-card-numbers.aspx
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