问题
How can I make plural/singular words pull all forms?
Example: If a person searches for "mens rings" how can I check the data base to see if any of the fields contain mens, men, men's, ring, rings, etc.?
回答1:
It dosn't seem that using LIKE would be the best approach for what you need. I would look into MySQL FULLTEXT indexing to get the basic functionality working. I'll have to look into the plural thing a bit more to see if that can be accomplished.
Take a look at these two links for FULLTEXT indexing info.
- http://dev.mysql.com/doc/refman/4.1/en/fulltext-search.html
- http://www.petefreitag.com/item/477.cfm
- http://dev.mysql.com/doc/refman/5.1/en/fulltext-boolean.html
Here is a snippet from the second article:
SELECT headline, story FROM news
WHERE MATCH (headline,story) AGAINST ('Hurricane');
UPDATE:
I found this SO post in which a comment seems to suggest that the FULLTEXT indexing will take plural and grammatical forms into account but he dosn't cite a source, so it's hard for me to say for sure. Can you try the FULLTEXT indexing method?
回答2:
The Sphinx full-text search engine for MySQL handles such cases, and a few more (see here).
It uses the Porter Stemmer algorithm [2][3] to map things like "fishing", "fished", "fish", and "fisher" to a root stem of "fish" (see wiki).
回答3:
select * from index_table where item_name rlike '[[:<:]]preform[s]*[es]*[ies]*[[:>:]]';
Check if this helps. My case it worked out. Although will not cover for all plurals but yes for 90-95% cases.
Cheers, Ashish
来源：https://stackoverflow.com/questions/3088433/sql-plural-singular-searches