to get only the closest value from database using sqlserver

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Hi,

I entered the value in a textbox if i give wrong spelling in the word i want to get the result from datbase which the closest matching to that search value

for example

Instead of Hyderabad is search for 'Hydearbad' which is wrong spelt i want to get suggestions from database only closest matching

Posted 12-Jul-14 1:24am

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Sanju Rao 12-Jul-14 8:35am

you need to write your own algorithm for this there is no in build function. The auto complete functionality gives you the suggestions only if the characters starts matching. In your case if you use auto complete functionality with Hydearbad. auto complete function stops as soon as you reach the letter e and type r.

Sanju Rao 12-Jul-14 8:43am

What I suggest is u can write algorithm. which divides the letter in matching and non matching characters. In your case match characters = "Hyde" and non match char = "arbad". Now get all the strings that match with "Hyde" and start matching recursively from the next char that are matching. If not match skip that match with next. The skipped should be given a rank value. keep proceeding in same way and the highest ranked vale will be your first string that is matching Hydearbad

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OriginalGriff · Answer 1 · 2014-07-12T04:25:00

Be aware that this is not trivial, not even slightly!
You are looking at implementing "Fuzzy Matching" which is not built in to SQL and is often implemented using the Levenshtein Distance algorithm[^] - there is an implementation of that here: http://www.kodyaz.com/articles/fuzzy-string-matching-using-levenshtein-distance-sql-server.aspx[^] and then ordering all "possible" strings by lowest LD value - the higher the LD, the more different two strings are.

Don't expect it to run quickly, and don't expect it to be simple to implement! :laugh:

Maciej Los · Answer 2 · 2014-07-12T11:45:00

Solution 3

Few years ago i asked similar question[^].
Please, visit it and find out the solution for you.

Posted 12-Jul-14 11:45am

Maciej Los