Hello i have a query that selects products from a database, but for some reason it returns duplicates. The problem is in my joins i guess since in the product table there is no duplicate product. Here is my query:
$stmt=$dbh->prepare("SELECT
p.name,
p.slug,
p.id_product,
p.price,
pig.image,
c1.slug as ssubcat,
c2.slug as subcat,
c3.slug as cat
FROM
tbl_products p
INNER JOIN tbl_products_to_categories ptoc
ON ptoc.id_product = p.id_product
INNER JOIN tbl_catalog_categories c1
ON ptoc.id_category = c1.id_category
LEFT JOIN tbl_catalog_categories c2
ON c1.id_parent = c2.id_category
LEFT JOIN tbl_catalog_categories c3
ON c2.id_parent = c3.id_category
INNER JOIN tbl_products_images_gallery pig
ON pig.id_product = p.id_product
WHERE (c1.slug = :slug OR c2.slug = :slug OR c3.slug = :slug )
AND p.active = 1
AND p.quantity = 1
ORDER BY p.name ASC
LIMIT $start, $row_limit");
Related
To filter the products that belongs to the selected filters, I wrote this query below. When i run this in Mysql, it is very fast. But when i'm trying to execute this query in Doctrine, it is very slow. Removing the group by gives me one result and than it is fast, but it has to be 11 results.
Even the more filters i add to this statement, the slower it gets.
Can anyone help me out with this problem?
SELECT DISTINCT p.id, p.brand_id, p.name, p.permalink, p.base_model,
p.ean, p.description, p.unit, p.price, p.offer_active, p.offer_price,
GROUP_CONCAT(DISTINCT m.url ORDER BY `m`.`order`, `p`.`id` SEPARATOR ",") AS url, pcm.category_id
FROM product p
LEFT JOIN product_category pc ON pc.product_id = p.id
LEFT JOIN media m ON p.id = m.product_id
INNER JOIN product_category pcm ON p.id = pcm.product_id AND pcm.main = 1 AND pcm.product_id IS NOT NULL
LEFT JOIN product_filter_value pfv1 ON p.id = pfv1.product_id
LEFT JOIN product_filter_value pfv2 ON p.id = pfv2.product_id
LEFT JOIN product_filter_value pfv3 ON p.id = pfv3.product_id
LEFT JOIN product_filter_value pfv4 ON p.id = pfv4.product_id
WHERE (pc.category_id = 23)
AND (p.active = 1)
AND (pfv1.filter_value_id IN (2))
AND (pfv2.filter_value_id IN (8))
AND (pfv3.filter_value_id IN (22))
AND (pfv4.filter_value_id IN (38))
GROUP BY 1
ORDER BY p.top desc
This is my query without variant options
SELECT p.*, pd.`name` AS `product_name`
FROM `product` AS `p`
LEFT JOIN `product_description` AS `pd` ON p.`id` = pd.`product_id`
LEFT JOIN `product_to_variant` AS `pv` ON p.`id` = pv.`product_id`
WHERE p.`status` = 0
GROUP BY p.`id`
ORDER BY p.`id` DESC;
SQLFiddle: http://sqlfiddle.com/#!9/8955b/5
and the follwing query has variant options but it doesn't work
SELECT p.*, pd.`name` AS `product_name`
FROM `product` AS `p`
LEFT JOIN `product_description` AS `pd` ON p.`id` = pd.`product_id`
LEFT JOIN `product_to_variant` AS `pv` ON p.`id` = pv.`product_id`
WHERE p.`status` = 0
AND (pv.`feature_id` = 2 AND pv.`variant_id` = 6)
AND (pv.`feature_id` = 3 AND pv.`variant_id` = 11)
GROUP BY p.`id`
ORDER BY p.`id` DESC;
and I also trying to query but there is no output
SELECT pv.* FROM `product_to_variant` AS `pv`
WHERE (pv.`feature_id` = 2 AND pv.`variant_id` = 2)
AND (pv.`feature_id` = 3 AND pv.`variant_id` = 11)
Do you have any other idea how to receive the products: 14, 15 by specific variant_id 6 AND 11 http://prntscr.com/ect2oh
Here is one method to do what you want:
SELECT p.*, pd.name AS product_name
FROM product p LEFT JOIN
product_description pd
ON p.id = pd.product_id JOIN
product_to_variant pv
ON p.id = pv.product_id
WHERE p.status = 0 AND
((pv.feature_id = 2 AND pv.variant_id = 6) OR
(pv.feature_id = 3 AND pv.variant_id = 11)
)
GROUP BY p.id
HAVING COUNT(DISTINCT feature_id) = 2
ORDER BY p.id DESC;
Notes:
No row can meet your original conditions. Because a column cannot have two values at the same time. Hence the OR rather than AND.
The HAVING clause checks that both values match.
There is no need for a LEFT JOIN to pv, because you are checking values from that table in the WHERE clause -- there have to be matches.
The LEFT JOIN to pa is probably also unnecessary.
Using backticks everywhere just makes the query harder to write and to read.
Maybe like this:
SELECT pv.* FROM `product_to_variant` AS `pv`
WHERE (pv.`feature_id` = 2 AND pv.`variant_id` = 2)
OR (pv.`feature_id` = 3 AND pv.`variant_id` = 11)
Instead of AND, which says, you need both feature_id and variant_id in the results, use OR because it takes both.
I have the following tables:
products table
-------------
id
name
...
categories table
----------------
id
name
product_categories table
------------------------
product_id
category_id
product_ratings
---------------
product_id
user_id
rating (1 to 5 INT)
How can I select (search) products and rating (average) by Category (name or id) and order them by Title or by rating.
I have tried some queries but im having some trouble on how to join tables and how to use where clause
Do you mean something like that?
select
products.name, categories.name, product_ratings.rating
from products
join product_categories on products.id = product_categories.product_id
join categories on categories.id = product_categories.category_id
join product_ratings on product_ratings.product_id = products.id
where
categories.name = 'CATEGORY NAME'
order by
product_ratings.rating
select p.name, r.rating
from products as p
inner join product_ratings as r on p.id = r.product_id
inner join categories as c on c.id = pc.category_id
inner join product_categories as pc = pc.product_id = p.id
where c.name = 'search_name'
order by r.rating;
Method 1
Rating by product and user id
SELECT
P.name, PR.user_id , IFNULL(PR.rating,0) as rating
FROM products P
JOIN product_categories PC ON P.id = PC.product_id
JOIN categories C ON C.id = PC.category_id
JOIN product_ratings PR ON PR.product_id = P.id
WHERE C.name = 'Category A'
ORDER BY P.name
Refer http://sqlfiddle.com/#!9/014af/6
Method 2
Rating by product id
Different users will rate the same product, so we have to consider the average rating of each product.
SELECT
P.name, GROUP_CONCAT(PR.user_id) as user_ids, AVG(IFNULL(PR.rating,0)) as rating
FROM products P
JOIN product_categories PC ON P.id = PC.product_id
JOIN categories C ON C.id = PC.category_id
JOIN product_ratings PR ON PR.product_id = P.id
WHERE C.name = 'Category A'
GROUP BY P.id
ORDER BY P.name
Refer http://sqlfiddle.com/#!9/014af/7
i want to use JOIN categories c ON c.id = i.category if post_type is 1 and i want to have c.title AS category_name, in SELECT otherwise JOIN categories c ON c.id = i.category and c.title AS category_name, must be not worked in query , i'm using case for join but my sql command is not correct. please help me. in all description my quastion means is how to change this below command to if post_type is 1 join must be not work
SELECT SQL_CALC_FOUND_ROWS
i. * ,
c.title AS category_name,
s.title AS status_title,
i.thumb_image,
CONCAT( u.name, ' ', u.family ) AS author
FROM contents i
LEFT JOIN categories c
ON i.category = CASE post_type WHEN 1 then c.id END
JOIN users u ON u.id = i.posted_by
JOIN status_topics s ON s.id = i.t_status
WHERE i.id = 2
I would always do the LEFT JOIN and put a condition on the column itself:
SELECT SQL_CALC_FOUND_ROWS
i. * ,
IF(i.post_type = 1, c.title, NULL) AS category_name,
s.title AS status_title,
i.thumb_image,
CONCAT( u.name, ' ', u.family ) AS author
FROM contents i
LEFT JOIN categories c ON i.category = c.id
JOIN users u ON u.id = i.posted_by
JOIN status_topics s ON s.id = i.t_status
WHERE i.id = 2
Hello can anybody see why this query fails?
SELECT A.idAd, A.ads_in_Cat, A.title, A.currency, A.price,
A.in_dpt, A.description, A.featured FROM ads A
LEFT JOIN featured F ON F.ad = A.idAd
INNER JOIN dept D ON D.id_dept = A.in_dpt
INNER JOIN sub_cat_ad S ON S.id_sub_cat = A.ads_in_Cat
INNER JOIN cat_ad C ON C.idCat_ad = S.from_cat_ad
ORDER BY A.featured DESC LIMIT :limit, :offset
But this one works:
SELECT *FROM ads
LEFT JOIN featured ON featured.ad = ads.idAd
INNER JOIN dept ON dept.id_dept = ads.in_dpt
INNER JOIN sub_cat_ad ON id_sub_cat = ads.ads_in_Cat
INNER JOIN cat_ad ON idCat_ad = sub_cat_ad.from_cat_ad
ORDER BY featured DESC LIMIT :limit, :offset
In the first one, I don't want all columns from the table "ads", the query returns only columns till ...FROM ads A.
If you specify to only select fields from A that's what you get: Only fields from A.
If you want fields from other tables too you have to specify them as well.
SELECT
A.idAd, A.ads_in_Cat, A.title, A.currency, A.price, A.in_dpt, A.description, A.featured,
F.*,
D.*,
S.*,
C.*
FROM ads A
LEFT JOIN featured F ON F.ad = A.idAd
INNER JOIN dept D ON D.id_dept = A.in_dpt
INNER JOIN sub_cat_ad S ON S.id_sub_cat = A.ads_in_Cat
INNER JOIN cat_ad C ON C.idCat_ad = S.from_cat_ad
ORDER BY A.featured DESC LIMIT :limit, :offset