问题
I am currently working on a live search and I need to be able to find parts of a name in two columns (we need to separate first and last name). I personally would like to keep the command short, however the only way I have been able to get this to work is:
User Searches For
John Doe
Generated SQL Query
SELECT * FROM users WHERE
(first_name LIKE '%john%' OR last_name LIKE '%john%') AND
(last_name LIKE '%doe%' OR last_name LIKE '%doe%');
The search field is one box so I do some simple separation by space. Most cases this won't reach beyond three sets of clauses, was just wondering if there was any better way to do this.
NOTE: I would like to be able to do partial matching. So I should be able to find John Doe if I look for "John Do"
SOLUTION With the help of Rolando, I did however come up with a solution, posted for anyone else who finds this. Follow his instructions on how to create the index below, then run this:
SELECT * FROM users WHERE
(MATCH(first,last) AGAINST ('+john* +do*' IN BOOLEAN MODE))
回答1:
Your best bet here is create a FULLTEXT index that encompasses the two fields
Step 1) Create a stop word file with just three word
echo "a" > /var/lib/mysql/stopwords.txt
echo "an" >> /var/lib/mysql/stopwords.txt
echo "the" >> /var/lib/mysql/stopwords.txt
Step 2) Add these options to /etc/my.cnf
ft_min_word_len=2
ft_stopword_file=/var/lib/mysql/stopwords.txt
Step 3) Create FULLTEXT index on the first and last name columns
ALTER TABLE users ADD FULLTEXT first_last_name_index (first,last);
Step 4) Implement the MATCH function in your search
Something Like This:
SELECT * FROM users WHERE (MATCH(first,last) AGAINST ('John' IN BOOLEAN MODE)) AND (MATCH(first,last) AGAINST ('Doe' IN BOOLEAN MODE));
Click here to Learn More about FULLTEXT indexing
来源：https://stackoverflow.com/questions/5138190/multi-column-name-search-mysql