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We are importing data from external source. This data does not have a global key, so we have Varchars, Dates, etc. to match.
The question is: How to make the perfomance of Varchar comparison better? Also, it there any tool that can allow to see match percentage (Like similiarity of rows: 90%)
Thanks!
Whilst not a direct answer to your question, if you’re importing data then Integration Services (if you’re not already using it) would be a decent choice. A couple of the transformations included in SSIS allow for ‘fuzzy matching’ – that is, matching data based on a confidence level of similarity.