I am studying the new database layer, and I am glad it is changed to an OOP layer. I need to implement a query with db_select(). I found I can add a WHERE statement with $query->condition(), but by default the conditions are AND'ed together.

How can I OR the conditions together?

$query->join('flag_content','fc' , 'u.uid = fc.content_id');
$query->condition('fc.fid', '5' , '=');
$query->condition('fc.uid', $uid , '=');

That's not correct, the default is AND. To use or, you need to use:

$or = db_or();

But the main conditions on the query are definitely joined with AND.

  • i found my mistake, tnx for reply. – Yusef Mohamadi May 31 '12 at 5:46

You can use this For making OR between 2 conditions ByDefault it is AND

$query->join('flag_content','fc' , 'u.uid = fc.content_id');

$db_or = db_or();
$db_or->condition('fc.fid', '5' , '=');
$db_or->condition('fc.uid', $uid , '=');

$result = $query->execute()->fetchAll();

It is possible to have AND condition within OR suppose you have 3 conditions and if you want it to be like con1 AND con2 OR con3 and evene many other cases in this case you can use db_and like db_or because when you are trying to use db_or all the conditions within db_or takes now in case you want and between those you can use db_and that is little tedious but its possible to implement it heres the example below

 $query = db_select('work_details_table','wd');
$query->join('work_table','w','wd.request_id = w.request_id');
if($status == 5 || $status == 6 || $status == 7){
}elseif($user_type == 'writer'){
  $db_or = db_or();
  $db_and = db_and();
}else if($user_type == 'editor'){
  $db_or = db_or();
  $db_and = db_and();
$completed_sku = $query->execute()->fetchAll();

This will give you an idea how the complex and or condition can be handled in Drupal PDO queries .


According to drupal 7 Database documentation the default is AND condition, but if you want to use OR condition then use this;

$db_or = db_or();
$db_or->condition('n.type', 'event', '=');
$db_or->condition('n.type', 'article', '=');

Simple example:

$nodes = db_select('node', 'n')
   ->condition('uid', 1)
   ->condition('status', 0)

By default there is AND condition, for OR condition need to add db_or() inside the condition.

$query = db_select('soccer_team"', 'n');
$query->fields('n',array('stid','title'))//SELECT the fields from node
        ->fields('n',array('title'))//SELECT the fields from user
        ->orderBy('title', 'ASC');

The db_or() solution won't work when you are building a complex query where you want most of the conditions to be conjoined with AND's and just one or some OR condition(s).

I ran into a case like this where I had conditions already, and I didn't want them to be OR conditions. I was able to use the where() method instead of condition to add another clause that included an OR. Here's an example similar to the query I used with the where method there near the end:

$query = db_select('users');
$query->join('user_join', NULL, 'users.uid = userid');
$query->join('field_data_account', NULL, 'appid = entity_id');
$query->leftJoin('users_roles', 'roles', 'users.uid = roles.uid');
$query->condition('account_target_id', $form['#account_id']);
$query->condition('userid', $lab_user->uid);
$query->where('appid <> :app_id OR rid = :rid', array(
    ':app_id' => $form['#app_id'],
    ':rid' => $role->rid,
$result = $query->execute()->fetchField();
  • This answer is not correct: db_or() works also when there are just two conditions that need to OR'ed out of 5 conditions that are AND'ed. There is not need to use $query->where(), for such case. – kiamlaluno Aug 16 '12 at 20:24
  • Thanks for the clarification, how would it be used in that case then? db_select()->condition()->condition()->db_or()->condition() ?? – tcm5025 Aug 16 '12 at 21:01
  • 1
    You need to use something similar to db_select()->condition($a)->condition($b)->condition(db_or()->condition($c)->condition($d))->condition($e); the resulting condition would be $a AND $b AND ($c OR $d) AND $e. I am using pseudo-code. db_or() is a function, not a method; db_select()->condition()->db_or() would return an error about a method not defined. – kiamlaluno Aug 16 '12 at 21:25
  • Ok, I get it. Thanks again for the explanation. I was under the impression that it was a method. So it would also have worked for my problem. – tcm5025 Aug 16 '12 at 22:04

For Drupal 8 you can use e.g.:

// Use only records with ACCEPTED or REJECTED action.
$orCondition = $query->orConditionGroup();
$orCondition->condition('action', 'ACCEPTED');
$orCondition->condition('action', 'REJECTED');

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