MySQL错误＃1054字段中的未知列

Question

This is my query:

SELECT COUNT( DISTINCT (paypal_transaction.buyerId) ) AS cid FROM eg_posts_details
INNER JOIN paypal_transaction ON paypal_transaction.id =  eg_posts_details.OrderId
WHERE seller_id =190

It runs perfectly on MySQL directly but when I run it from my PHP codeigniter model I get the #1054 error. I have no idea why this is happening. Please help.

Here is the PHP code:

 $query = $this->db->query("SELECT COUNT( DISTINCT (paypal_transaction.buyerId) ) AS cid 
FROM eg_posts_details 
INNER JOIN paypal_transaction ON paypal_transaction.id =  eg_posts_details.OrderId 
WHERE seller_id =190");

Answer 1

As per your image reference, paypal transaction table contain buyerId and you used it as buyer_id. So use the following. Use like this

$sql = "select count(distinct(`paypal_transaction`.`buyerId`)) as `cid` from `eg_posts_details` inner join `paypal_transaction` on `paypal_transaction`.`id` = `eg_posts_details`.`OrderId` where `seller_id`= '190' ";
$query = $this->db->query($sql);

Hope its work for you