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Sum and count variables while executing a left join


Sum and count variables while executing a left join

By : Prabhakar karve
Date : November 17 2020, 04:28 AM
With these it helps UPDATED example code below - using SQL within SAS: , You can use Between clause for this type of condition
code :
proc sql;
create table add_losses as 
select aa.*, bb.gl format, bb.n_losses
from
add_startend as aa
left join
(
select aa.process_name, aa.group_id, aa.start_date, aa.end_date, 
sum(bb.gross_loss) as gl format = comma15.2, 
count(bb.gross_loss) as n_losses
from add_startend as aa     
left join LED as bb 

on (aa.process_name = bb.process_name and
aa.group_id = bb.group_code and
bb.first_loss_posting_date between aa.start_date and aa.end_date)

group by aa.process_name, aa.group_id, aa.start_date, aa.end_date
) bb
on  aa.process_name = bb.process_name 
and aa.group_id = bb.group_code
and aa.start_date = aa.start_date
and aa.end_date = bb.end_date
order by aa.process_name, aa.group_id, aa.start_date, aa.end_date;
quit;


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Executing a query using sum, count, group by and multiple left join MySQL

Executing a query using sum, count, group by and multiple left join MySQL


By : user3002285
Date : March 29 2020, 07:55 AM
will be helpful for those in need Answer confirmed in comments, was to group on project_questions.id instead of votings.question_id
code :
SELECT
  project_questions.*,
  count(votings.vote) as vote,
  sum(case when votings.yes=1 then 1 else 0 end) as yes,
  sum(case when votings.no=1 then 1 else 0 end) as no,
  user.first_name,
  user.last_name
FROM
  project_questions
  LEFT JOIN votings ON votings.question_id=project_questions.id
  LEFT JOIN user ON user.user_id=project_questions.user_id
WHERE project_questions.project_id = '593'
GROUP BY project_questions.id
Count distinct with left join query executing long time

Count distinct with left join query executing long time


By : wadology
Date : March 29 2020, 07:55 AM
will be helpful for those in need I have about 140k raws in all these tables: , You can start from this query:
code :
SELECT COUNT( 
  DISTINCT p.product_id ) AS total
FROM bh_product p
INNER JOIN bh_product_description pd 
ON p.product_id = pd.product_id
  AND pd.language_id = 2
INNER JOIN bh_product_to_store p2s 
ON p.product_id = p2s.product_id 
  AND p2s.store_id = 0
WHERE p.status =  '1'
AND p.date_available <= NOW( ) 
AND (
pd.name LIKE  '%душевые%'
OR pd.tag LIKE  '%душевые%'
OR 'душевые' IN ( p.model , p.sku , p.upc , p.ean , p.jan , p.isbn , p.mpn ))
SELECT COUNT( 
  DISTINCT p.product_id ) AS total
FROM bh_product p
INNER JOIN bh_product_description pd 
ON p.product_id = pd.product_id
  AND pd.language_id = 2
INNER JOIN bh_product_to_store p2s 
ON p.product_id = p2s.product_id 
  AND p2s.store_id = 0
Left outer join with count, on 3 tables not returning all rows from left table

Left outer join with count, on 3 tables not returning all rows from left table


By : Chiensaker
Date : March 29 2020, 07:55 AM
hope this fix your issue I have these 3 tables: , You can add another left join to the Special_Persons table:
code :
select a.id as idArea, count(p.id), count(sp.id_person) 
from areas a 
left join persons p on p.area_id = a.id
left join special_persons sp on sp.id_person = p.id
group by a.id;
left join count ignore left table column from counting

left join count ignore left table column from counting


By : moarthenfeeling
Date : March 29 2020, 07:55 AM
hope this fix your issue I have two tables ...first has order_id, order_status, and user_id .... second table has order_id ,and product_id, product_quantity like below , You need to count the number of distinct occurrences of order_id:
code :
SELECT h.user_id, 
       COUNT(DISTINCT h.order_id) AS total_orders, 
       SUM(o.quantity) AS quantity 
FROM table1 h 
LEFT JOIN table2 o ON o.order_id=h.order_id 
WHERE h.order_status = 5 
GROUP BY h.user_id
COUNT(IF(h.order_status = 5,1,0)) AS total_orders
WHERE h.order_status = 5
SQL - LEFT JOIN, but I want COUNT(*) to only count the results from the INNER part of the join

SQL - LEFT JOIN, but I want COUNT(*) to only count the results from the INNER part of the join


By : Sophaneth Khean
Date : March 29 2020, 07:55 AM
wish of those help I want to display the number of purchases each customer has made. If they've made 0 purchases, I want to display 0. , Instead of count(*) use count(purchase_id)
code :
SELECT customer_name, COUNT(purchase_id) AS number_of_purchaes 
FROM customer 
LEFT JOIN purchases ON customer.customer_id = purchases.customer_id 
GROUP BY customer_id,customer_name
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