我正在使用Codeigniter,我希望通过id_user汇总总数量和分组:
表1:user_table
user_ID | name | ------ | ------ | 1 | John | 2 | Frank | 3 | Jesse | 4 | Patrick | 5 | Lucy |
表2:sales_table
sales_ID | user_ID | qty | ------ | ------ | ----- | 1 | 1 | 23 | 2 | 1 | 11 | 3 | 2 | 10 | 4 | 4 | 8 | 5 | 3 | 14 | 6 | 5 | 15 | 7 | 3 | 7 |
结果:
No | Name | total qty | ------ | ------ | --------- | 1 | John | 34 | 2 | Frank | 10 | 4 | Patrick| 8 | 5 | Jesse | 21 | 6 | Lucy | 15 |
如何在我的模型和控制器中使用CodeIgniter执行此结果? 有人请帮帮我吗?
答案 0 :(得分:0)
答案如下(但是你的意思是提供你所尝试的而不是期望人们为你做的事情:o))
SELECT ut.`name`,SUM(st.qty) as `total_qty`
FROM user_table ut
LEFT JOIN sales_table st USING (user_ID)
GROUP BY ut.user_ID
以下是Codeigniter中的内容:
$db = $this->db;
$db->select('ut.name,SUM(st.qty) as total_qty');
$db->join('sales_table st','user_ID','left');
$db->group_by('ut.user_ID');
$data = $db->get('user_table ut')->result_array();
答案 1 :(得分:0)
SELECT name, sum(qty) as total_qty FROM sales_table
LEFT JOIN user_table ON user_table.user_ID = sales_table.user_ID
GROUP BY sales_table.user_ID
答案 2 :(得分:0)
使用此:
$sql="SELECT ut.user_ID as No, SUM(st.qty) as total_qty , ut.name FROM sales_table st INNER JOIN user_table ut ON ut.user_ID = st.user_ID";
$query = $this->db->query($sql);
$result = $query->result();
print_r($result);
OR
$this->db->select('ut.user_ID as No, SUM(st.qty) as total_qty , ut.name');
$this->db->from('sales_table st');
$this->db->join('ser_table ut', 'ut.user_ID = st.user_ID');
$query = $this->db->get();
$result = $query->result();
print_r($result);