带有zend框架的IN（）子句中的多列

Question

Is it possible to do this sort of query in zend frameowrk?

SELECT * 
FROM `relations` 
WHERE (root_type, root_id) IN ( ("PRJ", 12), ("PRJ", 13), ("GRP", 42))

I only found a way to make a query with a IN clause on one column but not on two columns.

Answer 1

You can JOIN them instead, like this:

SELECT r.*
FROM relations r
INNER JOIN
(
   SELECT 'PRJ' AS root_typ, 12 AS root_id
   UNION ALL 
   SELECT 'PRJ',             13
   UNION ALL 
   SELECT 'GRP',             42
) AS t  ON r.root_type = t.root_type
       AND r.root_id   = t.root_id;

Answer 2

This is a ZF1 query using Zend_Db_Statement :

//common way to aquire currently selected db adapter
$db = Zend_Db_Table::getDefaultAdapter();
//$db is the currently selected database adapter.
$stmt = $db->query(
            SELECT * FROM `relations` 
            WHERE (root_type, root_id) 
            IN ( ("PRJ", 12), ("PRJ", 13), ("GRP", 42))
            );

This answer is not intended to be snide. For complex database queries, Zend_Db_Statement is often the easiest/simplest/best way to perform the query.

If you would like an explanation more tailored to your needs, please provide more info on your structure. In Zend Framework (1 or 2) there are often many ways to accomplish any given task.