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Using LIKE to return related keywords

I have a column in my database that contains keywords. I want to write a query that returns results that resemble the keyword. For example, if I am serching for AS-400 it should return all the columns containing AS/400, As 400, AS%400 and all related words. I hope it is something related to the indexes but I am not sure. I will highly appreciate if you can guide me regarding that.

Unfortunately, I know of no easy way in SQL to do this. Perhaps certain database vendors have provided extensions to make this easier. The closest thing to a solution I can give you is the LIKE predicate. Your example could be handled like this, but I don't think it's the generic answer for which you're looking:

  FROM YourTable 
  WHERE UPPER(StringToBeSearched) LIKE ?%AS%400%?

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