当php变量包含mysql查询时，如何在mysql查询中使用php变量？

Question

How can I implement something like this in mysql?

$query1 = "SELECT id FROM table WHERE username = 'John'";
$query2 = "SELECT id FROM table WHERE username= 'Parsa'";

$query = "SELECT * FROM table WHERE id BETWEEN $query1 AND $query2";



$result = mysql_query($query) or die('Query faild'.mysql_error());
$myrecord = mysql_fetch_assoc($result);

Answer 1

You can put those 3 queries in to one query:

$query = "SELECT * FROM table WHERE id 
          BETWEEN
           ( SELECT id FROM table WHERE firstname = 'John' GROUP BY id ) 
          AND
           ( SELECT id FROM table WHERE firstname = 'Parsa' GROUP BY id )
         ";

Answer 2

Try this

$query1 ="SELECT GROUP_CONCAT(id) FROM table WHERE firstname in('John','Parsa')";


$query = "SELECT * FROM table WHERE id IN ($query1)";

you have two identical queries , you could just have one . and use IN , not BETWEEN.

Answer 3

although your query doesn't mean anything; you need "()" for subqueries to work.

$query1 = "(SELECT id FROM table WHERE username = 'John')";
$query2 = "(SELECT id FROM table WHERE username= 'Parsa')";

$query = "SELECT * FROM table WHERE id BETWEEN $query1 AND $query2";

Answer 4

u can use a subselection:

SELECT * FROM table WHERE id BETWEEN ($query1) AND ($query2)

But be careful: The Subselection result must be an Integer.