MYSQL Join only on max row with data from multiple tables - mysql

I have a query that selects properties, and I need to join them to get the most recent activity on each one, where that activity_status = 3 (closed deal). when I get that, I need to get the bank that closed the deal (banks.is_reward = 1)
Problem is that the data is spread over many tables, so when I join to get all the results, and then try to limit to the max(activity_date), I need to group the results, and then I don't get the correct data from the other columns.
Here is a SQL Fiddle
I can do
Select * from properties
join
(SELECT deal_properties.property_id, activity.deal_id, activity.activity_date, banks.bank_id
FROM deal_properties
JOIN activity on activity.deal_id = deal_properties.deal_id
AND activity.activity_status = 3
JOIN banks ON banks.deal_id = activity.deal_id
AND banks.is_rewarded = 1) a
on a.property_id = properties.property_id;
and that will get me all the closed properties, with the rewarded banks, but I cant seem to limit that by the max(activity_date).

Option 1
The following gives what you're looking for following your current line of thought:
SELECT LastActivities.property_id, ActivityDetails.bank_id, LastActivities.activity_date
FROM (
SELECT p.property_id, MAX(a.activity_date) AS activity_date
FROM properties p
JOIN deal_properties dp
ON dp.property_id = p.property_id
JOIN activity a
ON a.deal_id = dp.deal_id AND a.activity_status = 3
GROUP BY p.property_id
) LastActivities
JOIN(
SELECT a.activity_date, dp.property_id, b.bank_id
FROM deal_properties dp
JOIN activity a
ON a.deal_id = dp.deal_id AND a.activity_status = 3
JOIN banks b
ON b.deal_id = a.deal_id AND b.is_rewarded = 1
) ActivityDetails
ON ActivityDetails.property_id = LastActivities.property_id
AND ActivityDetails.activity_date = LastActivities.activity_date
Here is the fiddle: HERE
Option 2
Below is another way to get the same results... This should be a bit more efficient as it only has one derived table instead of two.
SELECT p.property_id, b.bank_id, a.activity_date
FROM activity a
JOIN banks b
ON b.deal_id = a.deal_id AND b.is_rewarded = 1
JOIN deal_properties dp
ON dp.deal_id = a.deal_id
JOIN properties p
ON p.property_id = dp.property_id
JOIN(SELECT p.property_id, max(a.activity_date) AS activity_date
FROM activity a
JOIN deal_properties dp
ON dp.deal_id = a.deal_id
JOIN properties p
ON p.property_id = dp.property_id
GROUP BY p.property_id
) latest
ON latest.activity_date = a.activity_date AND latest.property_id = p.property_id
WHERE a.activity_status = 3
Here is the fiddle for option 2: HERE

looking to your sample seems you need
Select * from properties p
inner join
( SELECT deal_properties.property_id as property_id , max(activity.activity_date) max_date
FROM deal_properties
INNER JOIN activity on activity.deal_id = deal_properties.deal_id
AND activity.activity_status = 3
INNER JOIN banks ON banks.deal_id = activity.deal_id AND banks.is_rewarded = 1
group by property_id
) a on a.property_id = p.property_id;

Related

MYSQL Inner Join with IF Statement

I'm trying to join several tables in my database.
I need to get account information from the 'accounts' table with the latest meter history on it.
And if an account has no meter history, I want it to show 'meter' related fields as NULL.
Here's my query so far:
SELECT
accounts.id,
accounts.account_order,
acc.id AS accounts_class_id,
acc.zone,
acc.book,
acc.service_class,
acc.size,
acc.account_no AS series_no,
accounts.status,
application_address.address_line,
concessionaires.firstname,
concessionaires.middlename,
concessionaires.lastname,
mb.brand_name,
m.meter_no,
ms.meter_status
FROM
accounts
INNER JOIN
applications
ON accounts.application_id = applications.id
LEFT JOIN
application_address
ON applications.application_no = application_address.application_no
LEFT JOIN
concessionaires
ON applications.concessionaire_no = concessionaires.concessionaire_no
INNER JOIN
accounts_classifications acc
ON accounts.id = acc.account
INNER JOIN meter_history mh
ON mh.id = (SELECT id FROM meter_history mh2
WHERE mh2.account_id = accounts.id
ORDER BY mh2.status_date DESC
LIMIT 1)
LEFT JOIN
meter_status ms
ON mh.meter_status = ms.id
INNER JOIN
meter m
ON mh.meter = m.id
LEFT JOIN
meter_brand mb
ON m.meter_brand = mb.id
WHERE
acc.book = 1 AND acc.zone = 20 AND applications.status = '6' AND acc.status = '1'
This would return only accounts with meter history on it.
Where should I put my IF condition so I get accounts with no history as well, or if that is even possible with my query. Thank you!

NEGATION INNER JOIN with WHERE

Why the sql code below ignores
WHERE r.tt_schedules_id = '105'
in
SELECT DISTINCT r.load_date, u.url
FROM tt_results r
INNER JOIN url_lp u
ON u.lp_id <> r.lp_id
INNER JOIN tt_schedules s
ON s.tt_schedules_id = r.tt_schedules_id
WHERE r.tt_schedules_id = '105'
AND (DATE(NOW()) - DATE(r.load_date) <= 7)
?
Basically, it returns everything with any
tt_schedules_id
There are 5 tables:
url_lp, tt_results (table having foreign keys in url_lp, tt_schedules and
tt_tags), tt_schedules, tt_tags(not used) and tt_schedules_url_lp_hub
If you draw the scheme on the paper you should be clear.
I fixed it:
SELECT u.url FROM url_lp u
INNER JOIN tt_schedules_url_lp_hub hub
ON hub.lp_id = u.lp_id
INNER JOIN tt_schedules s
ON hub.tt_schedules_id = s.tt_schedules_id
WHERE s.tt_schedules_id = '105'
AND u.lp_id NOT IN
(SELECT r.lp_id FROM tt_results r WHERE r.tt_schedules_id = '105')
Cheers.

MySQL Update table with sum value of another table

I have a query that I can't seem to manipulate to work in a SUM function in MySQL:
Here is what I want:
UPDATE account_seeds AS a
INNER JOIN b AS b ON b.accountID = a.accountID AND a.areaID = b.areaID
INNER JOIN b_seed AS s ON s.buildingID = b.buildingID
INNER JOIN seed_class AS c ON c.seedID = s.seedID
SET a.amount = a.amount + SUM(s.amount)
WHERE b.status='active' AND a.seedID = s.seedID
Now it obviously won't let me use the SUM in the update without separating it. I have tried joining select queries but can't quite get my head around it. The basic premise being that I have multiple buildings(rows) that has a seed value that will increase total seeds of that type in the area for a particular account. Without the sum it only updates one of the buildings that has a matching seed value
UPDATE
account_seeds AS a
INNER JOIN
( SELECT b.accountID, b.areaID, s.seedID
, SUM(s.amount) AS add_on
FROM b AS b
INNER JOIN b_seed AS s
ON s.buildingID = b.buildingID
INNER JOIN seed_class AS c
ON c.seedID = s.seedID
WHERE b.status = 'active'
GROUP BY b.accountID, b.areaID, s.seedID
) AS g
ON g.accountID = a.accountID
AND g.areaID = a.areaID
AND g.seedID = a.seedID
SET
a.amount = a.amount + g.add_on ;
Maybe you can use a nested query:
UPDATE account_seeds AS a
INNER JOIN b AS b ON b.accountID = a.accountID AND a.areaID = b.areaID
INNER JOIN b_seed AS s ON s.buildingID = b.buildingID
INNER JOIN seed_class AS c ON c.seedID = s.seedID
SET a.amount = a.amount + (SELECT SUM(amount) FROM b_seed)
WHERE b.status='active' AND a.seedID = s.seedID
Can you try that?

How can I make more than one select queries in single select query.

I have to write a query where, I need to fetch records for last week, last month, and for all.
For this problem I wrote 3 diffrent queries (for last week, for last month and for all)
For Weekly Info :-
SELECT bu.brand_name AS 'Brand_Name',COUNT(s.unique) AS '# Item Sold',SUM(s.price) AS 'Total_Price'
FROM item_details s
LEFT JOIN sales_order o ON s.fk_sales_order = o.id_sales_order
LEFT JOIN customer_info AS c ON o.fk_customer_id = c.id_customer
LEFT JOIN simple_details cc ON s.unique = cc.unique
LEFT JOIN config_details cf ON cc.fk_config_id = cf.config_id
LEFT JOIN brand_details cb ON cf.fk_brand_id = cb.brand_id
LEFT JOIN category_details ctc ON cf.fk_category_id = ctc.category_id
LEFT JOIN gender_details g ON cf.fk_gender_id = g.gender_id
LEFT JOIN buyers AS bu ON bu.brand_name = cb.name AND bu.category_name = ctc.name AND bu.gender = g.name
WHERE bu.buyers = 'xyz' AND DATE_FORMAT(o.created_date,'%Y-%m-%d') >= #weekstartdate AND DATE_FORMAT(o.created_date,'%Y-%m-%d') <= #weekenddate
GROUP BY bu.brand_name
For Monthly Info :-
SELECT bu.brand_name AS 'Brand_Name',COUNT(s.unique) AS '# Item Sold',SUM(s.price) AS 'Total_Price'
FROM item_details s
LEFT JOIN sales_order o ON s.fk_sales_order = o.id_sales_order
LEFT JOIN customer_info AS c ON o.fk_customer_id = c.id_customer
LEFT JOIN simple_details cc ON s.unique = cc.unique
LEFT JOIN config_details cf ON cc.fk_config_id = cf.config_id
LEFT JOIN brand_details cb ON cf.fk_brand_id = cb.brand_id
LEFT JOIN category_details ctc ON cf.fk_category_id = ctc.category_id
LEFT JOIN gender_details g ON cf.fk_gender_id = g.gender_id
LEFT JOIN buyers AS bu ON bu.brand_name = cb.name AND bu.category_name = ctc.name AND bu.gender = g.name
WHERE bu.buyers = 'xyz' AND DATE_FORMAT(o.created_date,'%Y-%m-%d') >= #monthstartdate AND DATE_FORMAT(o.created_date,'%Y-%m-%d') <= #monthenddate
GROUP BY bu.brand_name
For All Records :-
SELECT bu.brand_name AS 'Brand_Name',COUNT(s.unique) AS '# Item Sold',SUM(s.price) AS 'Total_Price'
FROM item_details s
LEFT JOIN sales_order o ON s.fk_sales_order = o.id_sales_order
LEFT JOIN customer_info AS c ON o.fk_customer_id = c.id_customer
LEFT JOIN simple_details cc ON s.unique = cc.unique
LEFT JOIN config_details cf ON cc.fk_config_id = cf.config_id
LEFT JOIN brand_details cb ON cf.fk_brand_id = cb.brand_id
LEFT JOIN category_details ctc ON cf.fk_category_id = ctc.category_id
LEFT JOIN gender_details g ON cf.fk_gender_id = g.gender_id
LEFT JOIN buyers AS bu ON bu.brand_name = cb.name AND bu.category_name = ctc.name AND bu.gender = g.name
WHERE bu.buyers = 'xyz'
GROUP BY bu.brand_name
and these are working fine (giving currect output).
But problem is that, I have to merge these three queries in single one.
Where output should be as
Brand name, item_sold(week), total_price(week),item_sold(month), total_price(month),item_sold(all), total_price(all)
How can I write this query?
Without looking deep into your code, the obvious solution would be
SELECT
all.brand_name
pw.items_sold items_sold_week
pw.total_price total_price_week
pm.items_sold items_sold_month
pm.total_price total_price_month
all.items_sold items_sold_all
all.total_price total_price_all
FROM
(your all-time select) all
JOIN (your per-month select) pm ON all.brand_name = pm.brand_name
JOIN (your per-week select) pw ON all.brand_name = pw.brand_name
Though you probably should rethink your entire approach and make sure whether you really want that kind of logic in a DB layer or it is better to be in your application.
You could use case to limit aggregates to a subset of rows:
select bu.brand_name
, count(case when date_format(o.created_date,'%Y-%m-%d') >= #weekstartdate
and date_format(o.created_date,'%Y-%m-%d') <= #weekenddate
then 1 end) as '# Item Sold Week'
, sum(case when date_format(o.created_date,'%Y-%m-%d') >= #weekstartdate
and date_format(o.created_date,'%Y-%m-%d') <= #weekenddate
then s.price end) as 'Total_Price Week'
, count(case when date_format(o.created_date,'%Y-%m-%d') >= #monthstartdate
and date_format(o.created_date,'%Y-%m-%d') <= #monthstartdate
then 1 end) as '# Item Sold Month'
, ...
If all three selects uses the same fields in the results, you can UNION them:
SELECT *
FROM (SELECT 1) AS a
UNION (SELECT 2) AS b
UNION (SELECT 3) AS c
If you need to tell week/mon/all records from each other - just add constant field containing "week" or "mon"
You cam use the UNION.keyword between the queries to bundle them.together BUT tje column types and sequence must be the same in all queries. You could add an identifier to each set

mysql inner join causing multiplication

basically i have this structure:
Deal has and belongs to many Channels
Deal has many DealSales
Deal belongs to Channel
When i want to find the amount sold by a deal, i use this query:
SELECT targets.id,SUM(deal_sales.amount_sold) AS amount_sold
FROM deal_sales
INNER JOIN deals ON deals.id = deal_sales.deal_id
INNER JOIN targets ON deals.target_id = targets.id
WHERE targets.approved = 1 AND targets.active = 1
GROUP BY targets.id
its working just fine, the problem is when i need to filter by channel, find the amount sold by a deal in a channel:
SELECT targets.id,SUM(deal_sales.amount_sold) AS amount_sold
FROM deal_sales
INNER JOIN deals ON deals.id = deal_sales.deal_id
INNER JOIN targets ON deals.target_id = targets.id
**INNER JOIN channels_deals ON channels_deals.deal_id = deals.id**
WHERE targets.approved = 1 AND targets.active = 1
GROUP BY targets.id
When i add the join to channels table, the amount_sold is multiplied by each channel a deal has relation with. How can i avoid this?
Use IN or Exists
for example
SELECT targets.id,SUM(deal_sales.amount_sold) AS amount_sold
FROM deal_sales
INNER JOIN deals ON deals.id = deal_sales.deal_id
INNER JOIN targets ON deals.target_id = targets.id
WHERE targets.approved = 1 AND targets.active = 1
and
deals.id IN (SELECT deal_id from channels_deals where something = 1)
GROUP BY targets.id
Try this:
SELECT channels_deals.deal_id,SUM(deal_sales.amount_sold) AS amount_sold
FROM deal_sales
INNER JOIN deals ON deals.id = deal_sales.deal_id
INNER JOIN targets ON deals.target_id = targets.id
INNER JOIN channels_deals ON channels_deals.deal_id = deals.id
WHERE targets.approved = 1 AND targets.active = 1
GROUP BY channels_deals.deal_id