Is it a good idea to create an index on a field which is VARCHAR (500) ? I am going to do a lot of search in it, but I am not sure if creating an index on such a ‘big’ field is a good idea?
What do you think?
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Is it a good idea to create an index on a field which is VARCHAR (500) ? I am going to do a lot of search in it, but I am not sure if creating an index on such a ‘big’ field is a good idea?
What do you think?
It is usually not a good idea since the index files will be huge and the search relatively slow. It is better to use a prefix of the field such as the first 32 or 64 characters of the field as an index. Another possibility is that if it makes sense use a full text index,.