MySQL - How to search for exact word match using L

问题:

I'm using this query to select data:

mysql_query("SELECT * FROM products WHERE product_name LIKE '%".$search."%'");

The only problem is, that it sometimes selects more, than I would like.

For example, I would like to select product "BLA", but my query select product "BLABLA" as well. To be clear, if i wanted to select "Product 1", I don't want the query to select "Product 11".

Does anybody know how to manage that?

Thanks.

回答1:

Do you just want to search on word boundaries? If so a crude version might be:

SELECT * FROM products WHERE product_name LIKE "% foo %";

Or you could be a bit cleverer and look for word boundaries with the following REGEXP

SELECT * FROM products WHERE product_name RLIKE "[[:<:]]foo[[:>:]]";

回答2:

SELECT  *
FROM    products
WHERE   product_name = 'BLA'

will select exact BLA

SELECT  *
FROM    products
WHERE   product_name LIKE 'BLA%'

will select BLADDER and BLACKBERRY but not REBLAND

To select BLA as the first word of the string, use:

SELECT  *
FROM    products
WHERE   product_name RLIKE '^Bla[[:>::]]'
        AND product_name LIKE 'Bla%'

The second condition may improve your query performance if you have an index on product_name.

回答3:

Found this question on Google, so I figure that some people may still stumble upon this so here's my pretty inelegant attempt:

SELECT * FROM products
WHERE product_name LIKE 'BLA %' #First word proceeded by more words
OR WHERE product_name LIKE '% BLA' #Last word preceded by other words
OR WHERE product_name LIKE '% BLA %' #Word in between other words
OR WHERE product_name = 'BLA'; #Just the word itself

Not sure about the efficiency or if this covers all cases, so feel free to downvote if this is really inefficient or too inelegant.

回答4:

Try using regular expressions:

SELECT 
    *
FROM
    `products`
WHERE
    product_name regexp '(^|[[:space:]])BLA([[:space:]]|$)';

回答5:

Then don't use LIKE, but search for equality.

ie.

mysql_query("SELECT * FROM products WHERE product_name = '".$search."'");

BTW I hope you sanitize/escape $search before using it in a query.

回答6:

To exact match you should use:

mysql_query("SELECT * FROM products WHERE product_name = '" . $search . "'");

回答7:

Remove LIKE keyword and use = for exact match

EDIT

do not forgot to escape user input using mysql_real_escape_string otherwise your query will fail if some one enter quotes inside the input box.

$search=mysql_real_escape_string($search);
mysql_query("SELECT * FROM products WHERE product_name='".$search."'");

回答8:

Use equals (=)?

mysql_query("SELECT * FROM products WHERE product_name = '".$search."'"); 

If you are looking to match EXACT words don't use LIKE.

EDIT: That clears things up a bit then. Just add a space after the search term. Or even add the hyphen (-) if that is always in the search term.

mysql_query("SELECT * FROM products WHERE product_name LIKE '".$search." -%'"); 

回答9:

try to use regular expression in query

mysql_query("SELECT * FROM products WHERE product_name regexp '".$search."'");

回答10:

you can use select query like this ,i also use in cakePHP and it's helpful.

Select * from `users` where username COLLATE latin1_general_cs LIKE '%$email%'