My homework has a problem for example there is a category array $cat=array('1','4','5','7'); now i need to select products from db based on the category that is
SELECT * FROM products WHERE catid='1' SELECT * FROM products WHERE catid='4' SELECT * FROM products WHERE catid='5' SELECT * FROM products WHERE catid='7' Is it possible to do this in a single query? as the final results of the four queries will be combined.
3 Answers
SELECT * FROM products WHERE catid IN ('1', '2', '3', '4') // array of $ids that you need to select $ids = array('1', '2', '3', '4', '5', '6', '7', '8'); // create sql part for IN condition by imploding comma after each id $in = '(' . implode(',', $ids) .')'; // create sql $sql = 'SELECT * FROM products WHERE catid IN ' . $in; // see what you get var_dump($sql); Update: (a short version and update missing comma)
$ids = array('1','2','3','4'); $sql = 'SELECT * FROM products WHERE catid IN (' . implode(',', $ids) . ')'; $SQL_Part="(" $i=0; while ($i<length($cat)-1) { $SQL_Part+=$cat[i]+","; } $SQL_Part=$SQL_Part+$cat[$i+1]+")" $SQL="SELECT * FROM products WHERE catid IN "+$SQL_Part; It's more generic and will fit for any array!!
