MySql文本搜索找到类似的字符串

Question

I'm trying to find a way to query a particular database table column for similar strings or words. For example, if I have a string

I have a foo bar in my kitchen

The query would return results such as...

foo fighters are a good band
raise the bar
kitchen remodeling contractors
foo bar is a funny word

Can this be done with one query?

Answer 1

It seems like you are trying to match on any word in your given list. I would use the "OR" operator.

Example (assuming your table is called my_table and the column you are searching is my_column ):

SELECT * FROM my_table WHERE my_column like '%I%'
OR my_column LIKE '%have%'
OR my_column LIKE '%a%'
OR my_column LIKE '%foo%'
OR my_column LIKE '%bar%'
OR my_column LIKE '%in%'
OR my_column LIKE '%my%'
OR my_column LIKE '%kitchen%';

However, this query will run very slowly due to the double wildcards. You can also try http://dev.mysql.com/doc/refman/5.0/en/fulltext-search.html

Answer 2

At a basic level, you want to implement a full-text index on the column, so (assuming your column is col1 and your table is tbl), you'd need to alter table tbl add fulltext(col1); and search using select id from tbl where match(col1) against 'foo' or match(col1) against 'bar' or match(col1) against kitchen ... and so on, so forth, as described in this tutorial . There's nothing wrong with @WinnieTong's answer, it's just that this sort of use case is precisely what a full-text index was designed for.

When you get beyond the abilities of mysql , people generally use Sphinx or Apache SoLR to accomplish a searchable index.