次のように2つのテーブルがあります。
- tblSaler
SalerID | SalerName |
----------------------|
1 | sothorn |
----------------------|
2 | Daly |
----------------------|
3 | Lyhong |
----------------------|
4 | Chantra |
----------------------|
- tblProduct
ProductID | Product | SalerID |
--------------------------------|
1 | Pen | 3 |
--------------------------------|
2 | Book | 2 |
--------------------------------|
3 | Phone | 3 |
--------------------------------|
4 | Computer | 1 |
--------------------------------|
5 | Bag | 3 |
--------------------------------|
6 | Watch | 2 |
--------------------------------|
7 | Glasses | 4 |
--------------------------------|
私が必要とする結果は次のとおりです。
sothorn | 1
Daly | 2
Lyhong | 3
Chantra | 1
私はこれを試しました:
$this->db->select('count(SalerName) as sothorn where tblSaler.SalerID = 1, count(SalerName) as Daly where tblSaler.SalerID = 2, count(SalerName) as Lyhong where tblSaler.SalerID = 3, count(SalerName) as Chantra where tblSaler.SalerID = 4');
$this->db->from('tblSaler');
$this->db->join('tblProduct', 'tblSaler.SalerID = tblProduct.SalerID');