I have a inner join query as below,
SELECT * FROM shop_offer so INNER JOIN shop s ON s.shop_id = so.shop_id INNER JOIN city c ON c.city_id = s.city_id INNER JOIN locality l ON l.locality_id = s.locality_id INNER JOIN category ca ON ca.category_id = s.category_id WHERE so.offer_discount >= 10 AND so.publish = 1
While executing the above query in phpmyadmin, the result showing only one row as expected.
But when i tried this query in codeigniter, the result showing 3 rows. My codeigniter code is,
$this->db->select('*');
$this->db->from('shop_offer as so');
$this->db->join('shop as s', 's.shop_id = so.shop_id');
$this->db->join('city as c', 'c.city_id = s.city_id');
$this->db->join('locality as l', 'l.locality_id = s.locality_id');
$this->db->join('category as ca', 'ca.category_id = s.category_id');
$this->db->where(array('so.offer_discount >=' => 10, 'so.publish' => 1));
$query = $this->db->get();
What is the problem in codeigniter code. I am new in codeigniter. Is thre any way to solve this error.
You can also try running the query like this,
$this->db->query("SELECT * FROM shop_offer so
INNER JOIN shop s ON s.shop_id = so.shop_id
INNER JOIN city c ON c.city_id = s.city_id
INNER JOIN locality l ON l.locality_id = s.locality_id
INNER JOIN category ca ON ca.category_id = s.category_id
WHERE so.offer_discount >= 10 AND so.publish = 1");
Related
I am working on a project with PHP and MySQL. I am trying to run a SQL query where I need to fetch data from 5 tables. I'm getting an error on my query.
$value = json_decode(file_get_contents('php://input'));
$estId = $value->estId;
$sql = 'SELECT establishments.id, establishments.name,
establishments.stay_value, establishments.latitude,
establishments.longitude, establishments.description,
establishments.address,
facilities.id, facilities.name,
accomodations.id,accomodations.name
FROM establishments
INNER JOIN (establishments_facilities
INNER JOIN facilities
ON establishments_facilty.facility_id = facilities.id)
ON establishments.id = establishments_facility.id
INNER JOIN (establishments_accommodations
INNER JOIN accommodations
ON establishments_accommodations.accommodation_d = accomodations.id)
WHERE establishments.id ="'.$estId .'" ';
$result = $conn->query($sql);
if($result->num_rows>0){
while($row = $result->fetch_assoc()){
$json_obj = $row;
}
$json_obj['success'] = true;
echo json_encode($json_obj);
}
My 5 tables are:
establishments
1 id
2 user_id
3 name
4 logo
5 description
6 email
7 latitude
8 longitude
9 stay_value
accomodations
1 id
2 name
facilities
1 id
2 name
establishments_accommodations
1 id
2 establishment_id
3 accommodation_id
establishments_facilities
1 id
2 establishment_id
3 facility_id
Any help will be appreciated.
The query you wrote is hard to read and you should use alias for better readability and also join syntax does not look correct, here is the query with proper alias
SELECT
e.id,
e.name,
e.stay_value,
e.latitude,
e.longitude,
e.description,
e.address,
f.id,
f.name,
a.id,
a.name
FROM establishments e
INNER JOIN establishments_facilities ef on e.id = ef.id
INNER JOIN facilities f ON ef.facility_id = f.id
INNER JOIN establishments_accommodations ea on ea.establishment_id = ef.establishment_id
INNER JOIN accommodations a ON ea.accommodation_d = a.id
WHERE e.id ={some value}
Now in PHP you may have something as
$sql = "
SELECT
e.id,
e.name,
e.stay_value,
e.latitude,
e.longitude,
e.description,
e.address,
f.id,
f.name,
a.id,
a.name
FROM establishments e
INNER JOIN establishments_facilities ef on e.id = ef.id
INNER JOIN facilities f ON ef.facility_id = f.id
INNER JOIN establishments_accommodations ea on ea.establishment_id = ef.establishment_id
INNER JOIN accommodations a ON ea.accommodation_d = a.id
where e.id = '".$estId."'";
Note that where e.id = '".$estId."'" is vulnerable to sq-injection, so better to use prepared statement.
SELECT a.*, c.category_name FROM products a JOIN product_categories b ON a.id = b.product_id
JOIN categories c ON b.category_id = c.id WHERE a.store_id = 20
You can try this:
$data = Yii::app()->db->createCommand('Your query here')->queryAll();
var_dump($data);
I have the query below that works fine when I use it in phpMyAdmin, I am just a bit unsure how to do it within the CI framework when I have the m.id etc in place.
Query:
SELECT DISTINCT m.name, m.id, c.id, c.name
FROM `default_ps_products` p
INNER JOIN `default_ps_products_manufacturers` m ON p.manufacturer_id = m.id
INNER JOIN `default_ps_product_x_cats` x ON p.id = x.product_id
INNER JOIN `default_ps_products_categories` c ON x.category_id = c.id
There are many ways.
Example 1:
$result = $this->db
->select('m.name, m.id, c.id, c.name')
->distinct()
->join('default_ps_products_manufacturers m', 'p.manufacturer_id=m.id')
->join('default_ps_product_x_cats x', 'p.id=x.product_id')
->join('default_ps_products_categories c', 'x.category_id=c.id')
->get('default_ps_products p')
->result();
echo $this->db->last_query();
Sometimes the active record can't produce the query you want. So you can write it yourself.
Example 2:
$query = "SELECT DISTINCT m.name, m.id, c.id, c.name
FROM `default_ps_products` p
INNER JOIN `default_ps_products_manufacturers` m ON p.manufacturer_id = m.id
INNER JOIN `default_ps_product_x_cats` x ON p.id = x.product_id
INNER JOIN `default_ps_products_categories` c ON x.category_id = c.id";
$result = $this->db
->query($query)
->result();
echo $this->db->last_query();
In this second example, db::query() can take an array as the second parameter that will replace any question marks (?) within $query with the respective value. For example say you needed to add some where values to your query.
Example 3:
$query = "SELECT DISTINCT m.name, m.id, c.id, c.name
FROM `default_ps_products` p
INNER JOIN `default_ps_products_manufacturers` m ON p.manufacturer_id = m.id
INNER JOIN `default_ps_product_x_cats` x ON p.id = x.product_id
INNER JOIN `default_ps_products_categories` c ON x.category_id = c.id
WHERE c.id=?";
$result = $this->db
->query($query, array(1))
->result();
echo $this->db->last_query();
function search_num_rows($param){
$company_name=$param['company_name'];
$loan_no=$param['loan_no'];
$q = $this->db->query("select Count(0) as num_rows
from contact_new
inner join companies c on contact_new.company_id = c.id
inner join history on contact_new.id = history.receiver_email
inner join escalation_level on contact_new.escalation_level_id = escalation_level.id
inner join departments on contact_new.departmend_id = departments.id
WHERE loan_no= '$loan_no' if($company_name){ AND company_name= '$company_name'} ")->result();
return $q[0]->num_rows;
}
can i insert the php code as i done in where clause.Is there any other way to do this without using active records.
It's actually very easy:
function search_num_rows($param){
$company_name = (isset($param['company_name']) && !empty($param['company_name']) ? " AND company_name = '$param[company_name]'" : '');
$loan_no=$param['loan_no'];
$q = $this->db->query("select Count(0) as num_rows
from contact_new
inner join companies c on contact_new.company_id = c.id
inner join history on contact_new.id = history.receiver_email
inner join escalation_level on contact_new.escalation_level_id = escalation_level.id
inner join departments on contact_new.departmend_id = departments.id
WHERE loan_no= '$loan_no' $company_name")->result();
return $q[0]->num_rows;
}
I have 4 tables, that's all in a relationship, yes they love each other :p
Products
Product Categories
Product Category Relationships
Product Images
I want to join these 4 tables in one query, here is my Codeigniter code to do this;
function list_products($limit = 10, $offset = 0, $category)
{
$this->db->select('p.url, p.name, p.title, i.image');
$this->db->from('products p');
$this->db->join('product_categories c','c.id = r.category_id',
'left');
$this->db->join('product_category_relations r',
'r.category_id = c.id','left');
$this->db->join('product_images i',
'p.id = i.product_id AND i.default = 1','left');
$this->db->where('c.url',$this->category_url.$category);
$this->db->limit($limit,$offset);
return $this->db->get()->result();
}
When i execute this function / query, the result is an error about defining "r".
Unknown column 'cms_r.category_id' in 'on clause'
The query:
SELECT p.url, p.name, p.title, i.image FROM
(cms_products p) LEFT JOIN cms_product_categories c ON c.id =
cms_r.category_id LEFT JOIN cms_product_category_relations r ON
r.category_id = c.id LEFT JOIN cms_product_images i ON
p.id = i.product_id AND i.default = 1 WHERE c.url =
'kategori/yilbasi' LIMIT 12
Can you help me?
You assign r to be similar to product_category_relations after you use it.
Here you write:
$this->db->join('product_categories c','c.id = r.category_id','left');
But what is r? You answer this question only in the next statement.
$this->db->join('product_category_relations r','r.category_id = c.id','left');
Provide sample SQL Create script, if you want concrete answer.
#Edward Ruchevits your query does not join because of r.category_id define after joining of product_category_relations r, you need Relationships between products and product_categories then your query something be like
$this->db->join('product_categories c','c.product_id = p.id','left');