This query gives an error if subquery return more than 1 row. I separated the queries and use mysqli_multi_query(), but both queries data is displayed in two tables.
So I decided to make the one query.
SELECT DISTINCT category ,
(SELECT COUNT(products.name)
FROM products
where category_id=categories.id
) AS total_products,
(
SELECT SUM(quantity) FROM productstock a
LEFT JOIN products b ON a.product_id=b.id
LEFT JOIN categories c ON b.category_id=c.id
where c.deleted=0
GROUP BY category_id
) AS available_stock,
SUM(product_qty*orignalCost) AS SaleWise_cost,
SUM(product_qty*saleprice) AS SaleWise_price,
SUM(product_qty*saleprice) AS total_sale ,
SUM((product_qty*saleprice)-(product_qty*orignalCost)) AS profit
FROM categories
INNER JOIN products ON categories.id = products.category_id
INNER JOIN sales ON sales.product_id = products.id
INNER JOIN productstock ON productstock.product_id = products.id
WHERE categories.deleted=0
GROUP BY category_id
As available stock is corelated subquery so joining condition must be added in where clause inside subquery. please check this pseudocode
(
SELECT SUM(quantity) FROM productstock a
LEFT JOIN products b ON a.product_id=b.id
LEFT JOIN categories c ON b.category_id=c.id
where c.deleted=0 AND b.category_id = categories.id
) AS available_stock
Another way
(SELECT SUM(quantity)
FROM products b
INNER JOIN productstock a
ON b.id = a.product_id
AND b.id = products.id
AND b.category_id = categories.id) AS available_stock
Related
for this i have 3 tables
categories(id,category)
products(id,category_id,name)
productstock(id,product_id,quantity)
the query written for this
select categories.category,sum(productstock.quantity)
from categories
inner join productStock on products.id=productstock.product_id
inner join products on categories.id=products.category_id
group by category;
it would be a great help
Try using LEFT JOIN.
SELECT c.category, SUM(quantity) AS 'sum_qty' FROM productstock a
LEFT JOIN products b ON a.product_id=b.id
LEFT JOIN categories c ON b.category_id=c.id
GROUP BY category_id;
I have two tables called work and stuff both tables have same fields -
company, quality, quantity
I need the sum of all the quantity of work with group by company and quality and join the table with sum of all the quantity of stuff with group by company and quality
I didn't get the expected result.
SQLfiddel
http://sqlfiddle.com/#!9/eea577/6
working query
select st.company,st.quality,st.quantitys - ct.quantitys as balance from
(select company,quality,sum(quantity) as quantitys from stuff
group by quality,company) as st join (select company,quality,
sum(quantity) as quantitys from work group by quality,company)
as ct on `ct`.`company` = `st`.`company` and ct.quality = st.quality group by quality,company
u have missed the quality condition in the join
Try the following:
SELECT tableA.ID, tableA.`Year`, tableA.`Month`,
tableA.`Type`, tableA.instrument,
tableA.totalAmount, tableB.totalInstrument
FROM
(
SELECT a.ID, a.`Year`, a.`Month`,
b.`Type`, b.instrument,
SUM(b.`amount`) totalAmount
FROM `date` a
INNER JOIN `transactions` b
ON a.ID = b.id
GROUP BY b.`Type
) tableA
INNER JOIN
(
SELECT a.ID, a.`Year`, a.`Month`,
b.`Type`, b.instrument,
SUM(b.`instrument`) totalInstrument
FROM `date` a
INNER JOIN `transactions` b
ON a.ID = b.id
GROUP BY a.`Year`, a.`Month`
) tableB ON tableA.ID = tableB.ID AND
tableA.`Year` = tableB.`Year` AND
tableA.`Month` = tableB.`Month`
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 have two sql queries that I need to combine into one query for better efficiency, just not sure how to do it. Basically I need to query my Supplier, then for each supplier check to see if the Listing table has more than one record that matches based upon "supplier id", if it does then I need to return the supplier name and id. Here are my two queries:
Query 1:
SELECT s.name, s.id
FROM Supplier s
Query 2:
SELECT l.asin,
l.id,
COUNT(*) c
FROM Listing l
LEFT JOIN Product p
ON p.id = l.product_id
LEFT JOIN Supplier s
ON p.supplier_id = s.id
WHERE (l.matchValidated IS NULL OR l.matchValidated = 0)
AND s.id = SUPPLIER_ID_GOES_HERE
GROUP BY l.asin HAVING c > 1);
You already have supplier joined in the second query so you just need to add the supplier name and id to your SELECT and GROUP BY.
SELECT l.asin,
l.id,
s.name AS supplier_name,
s.id AS supplier_id,
COUNT(*) c
FROM Listing l
LEFT JOIN Product p
ON p.id = l.product_id
LEFT JOIN Supplier s
ON p.supplier_id = s.id
WHERE (l.matchValidated IS NULL OR l.matchValidated = 0)
GROUP BY l.asin, l.id, s.name, s.id
HAVING c > 1;
I have got 2 tables: categories and products.
Categories have parent-child relationship structure and the data is fetched by joining the same table.
When fetching the data, I have to count:
how many products each category contains which have stock >= 1
how many subcategories a category contains which contain at least 1 product with stock >= 1
SELECT c. * , count( DISTINCT s.cat_id ) AS number_of_subcategories, count( DISTINCT p.id ) AS number_of_products FROM categories c
LEFT JOIN categories s
ON s.parent_id = c.cat_id
LEFT JOIN products p
ON p.cat_id = c.cat_id AND p.stock >= 1
GROUP BY c.cat_name
ORDER BY number_of_products ASC
At the first glance all goes well, but unfortunately I get total number of all subcategories.
Do I miss one more join or what is my problem so far?
Here is the code: SQLFiddle
You could alter your query to use a subquery to get the number of subcategories similar to this:
SELECT c.cat_id,
c.parent_id,
c.cat_name,
count(sp.cat_id) AS number_of_subcategories,
count(DISTINCT p.id) AS number_of_products
FROM `categories` c
LEFT JOIN
(
select distinct s.cat_id, s.parent_id
from categories s
inner join products p
on s.cat_id = p.cat_id
where p.stock > 1
) sp
ON sp.parent_id = c.cat_id
LEFT JOIN products p
ON p.cat_id = c.cat_id
AND p.stock >= 1
GROUP BY c.cat_id, c.parent_id, c.cat_name;
See SQL Fiddle with Demo
Try changing AND for WHERE. Does it work?
Francisco