在mysql中使用like语句

Question

I am working on a table with name exp1, in this table there is a column named filename which contain data like exp_ara1.txt, exp_gma1.txt, exp_sly1.txt., exp_rcy1.txt, exp_thy1.txt

By using MySQL query I want to select only those rows which have filename either %ara% or %gma%. I am using following command:

Select * from exp1 where filename LIKE ('%ara%' OR '%gm%');

but it is results Your SQL query has been executed successfully. MySQL returned an empty result set (ie zero rows).

Answer 1

尝试这个：

Select * from exp1 where filename LIKE ('%ara%') OR filename LIKE ('%gm%');

Answer 2

Using REGEXP we can write a single term to match using an alternation:

SELECT *
FROM exp1
WHERE filename REGEXP '(.*ara.*)|(.*gm.*)'

Answer 3

I think this is one of the best process as if you have more multiple words to put in like::

$sql = array('0'); // Stop errors when $words is empty

foreach($words as $word){
    $sql[] = 'filename LIKE %'.$word.'%'
}

$sql = 'SELECT * FROM exp1 WHERE '.implode(" OR ", $sql);

Answer 4

In MySQL you don't have the option to use the CONTAINS function like in SQL Server or Oracle, which is what it looks like your trying to do.

SELECT * 
FROM exp1
WHERE (filename LIKE ('%ara%') OR filename LIKE ('%gm%'));