Today's question comes from Mike:
Hello Mr. Guru. Quick question.
How do I rank search results?
Search for "the dog"Result 100% - the dog bla bla bla 50% - a dog bla bla bla 25% - and og bla bla bla
Is there a SQL function that does this or do I have to do it manually? If manually, how would I sort it?
There are a pair of sql functions that you may want to look at:
SOUNDEX phonetically encodes a string and returns the coded
value. The more useful function,
DIFFERENCE, phonetically compares two
strings and returns a value from 0(not at all similar) to 4(very similar).
That's about in in pre SQL 7.0. Starting with SQL 7.0, I'd recommend using the full-text indexing features. You can do a full text search and returned ranked results, similar to what you have above. Look in SQL Server books online... there's more than enough there to get ya started.
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