MySQL where clause equals anything (SELECT * WHERE col = ANY_VALUE)

Question

I\'d like to create a query in MySQL that has an optional value. When the value is specified the query is filtered by that value, when the value is not all rows are returned

Answer 1

Better way to do this is first generate sql query from the parameter you need to bother on, and then execute.

function doQuery($params) {
    $query = 'SELECT * FROM mytable ';
    if (is_array($params) // or whatever your condition ) { 
        $query .= 'WHERE item = ' . $params[0];
    }
    $query .= ' ;';

    // execute generated query
    execute($query);
}