I want to perform the following SQL statement in PHP using Laravel's Eloquent model:
SELECT *, (3959 * acos(cos(radians(37)) * cos(radians(lat)) * cos(radians(lng) - radians(-122)) + sin(radians(37)) * sin(radians(lat )))) AS distance
FROM example_retailers
HAVING distance < 1000
ORDER BY distance
OFFSET 4
LIMIT 3;
I am struggling to translate this into a Laravel's Eloquent Model (mainly the calculated column).
This is what I have so far:
ExampleRetailer::
// TODO: add calculated row
where('distance', '<', 100)
->orderBy('distance')
->skip(4)
->limit(3)
->get();
You can use raw queries (source )
DB::table('example_retailers')
->select(DB::raw('*, (3959 * acos(cos(radians(37)) * cos(radians(lat)) * cos(radians(lng) - radians(-122)) + sin(radians(37)) * sin(radians(lat )))) AS distance'))
->having('distance', '<', 100)
->orderBy('distance')
->skip(4)
->limit(3)
->get();
If it's only to make a new row using SQL:
SELECT *, CASE WHEN (3959 * acos(cos(radians(37))
* cos(radians(lat))
* cos(radians(lng) - radians(-122))
+ sin(radians(37))
* sin(radians(lat )))) < 100 THEN END AS NewRow
FROM example_retailers
Related
Is it possible to simplify this sql query? Lots of calculations are reused and it would be nice to name each expression and use the name instead of the full expression.
SELECT SUM(T2.price * T1.amount) As price,
(SUM(T2.price * T1.amount) - (SUM(T2.price * T1.amount) * (T3.discount / 100))) As base_price,
((SUM(T2.price * T1.amount) - (SUM(T2.price * T1.amount) * (T3.discount / 100))) * (T3.vat / 100)) As vat_amount,
(((SUM(T2.price * T1.amount) - (SUM(T2.price * T1.amount) * (T3.discount / 100))) * (T3.vat / 100)) + (SUM(T2.price * T1.amount) - (SUM(T2.price * T1.amount) * (T3.discount / 100)))) As total_price
I'm looking for a solution similar to this:
SELECT SUM(T2.price * T1.amount) As price,
(price - (price * (T3.discount / 100))) As base_price,
(base_price) * (T3.vat / 100)) As vat_amount,
(vat_amount) + (base_price) As total_price
I tried doing it with CTE's and subqueries as suggested but it ended up looking pretty complicated and undreadable so I decided to just do the calculations outside of sql (php in this case)
Maybe something like that:
select
(A.price - (A.price * B.p_discount)) As base_price,
((A.price - (A.price * B.p_discount)) * B.p_vat) As vat_amount,
(((A.price - (A.price * B.p_discount)) * B.p_vat) + (A.price - (A.price * B.p_discount))) As total_price
from
( select SUM(T2.price * T1.amount) As price, ...
from T1 join T2 on ....
) A
join
(select (T3.discount / 100) as p_discount , (T3.vat / 100) as p_vat ,*
from T3
) B on ...
My SQL is something like this:
SELECT
NAME,
PLACE,
ETC,
format(((sum((AMOUNT * U_PRICE)) - ((sum((AMOUNT * U_PRICE)) * 20) / 100)) * 1.18),2) AS TOTAL_PRICE
FROM
THE_TABLE
And my Eloquent query is:
theTable::select(
'NAME',
'PLACE',
'ETC',
'format(((sum((AMOUNT * U_PRICE)) - ((sum((AMOUNT * U_PRICE)) * 20) / 100)) * 1.18),2) AS TOTAL_PRICE'
)
->get();
But it doesn't work because Eloquent interprets it something like select name, place, etc, format sum from the_table.
I have treid to use DB::raw but then it says that it didn't expect object.
theTable::select(
'NAME',
'PLACE',
'ETC',
DB::raw('format(((sum((AMOUNT * U_PRICE)) - ((sum((AMOUNT * U_PRICE)) * 20) / 100)) * 1.18),2) AS TOTAL_PRICE')
)
->get();
So, how can I use raw SELECT statement in Eloquent?
Use this way
DB::table('THE_TABLE')
->select(DB::raw('
NAME,
PLACE,
ETC,
format(((sum((AMOUNT * U_PRICE)) - ((sum((AMOUNT * U_PRICE)) * 20) / 100)) * 1.18),2) AS TOTAL_PRICE
'))
->get();
I am trying to count of coupons sold by each store from the list of stores within 20 miles range. I know the following syntax will work if there is only 1 store.
SELECT sum(couponscount) as count where restaurant IN (SELECT storename where bhal bhal bhal and output is one value)
What is I the IN (SELECTstorenamewhere bhal bhal bhal and output is multiple values) will return multiple values?
Like in my case the complete SQL is like and its not working
SELECT sum(couponscount) as count FROM `coupons` having `restaurant` IN (SELECT `storename`, ((ACOS(SIN(-27.561264299999998 * PI()/180) * SIN(latitude * PI()/180) + COS(-27.561264299999998 * PI()/180) * COS(latitude * PI()/180) * COS((153.07304890000003 – longitude) * PI()/180)) *180 / PI( )) *60 * 1.1515) AS `distance` FROM `stores` WHERE `status`=’active’ HAVING `distance` <=20)
Is there anyway to make it working?
SELECT sum(couponscount) AS COUNT,restaurant
FROM `coupons`
WHERE `restaurant` IN
(SELECT `storename`
FROM `stores`
WHERE `status`='active'
AND
((ACOS(SIN(-27.561264299999998 * PI()/180) * SIN(latitude * PI()/180) + COS(-27.561264299999998 * PI()/180) * COS(latitude * PI()/180) * COS((153.07304890000003 – longitude) * PI()/180)) *180 / PI()) *60 * 1.1515) <=20)
GROUP BY restaurant
Also use proper quotes for active.
Presumably, you want to get the count of coupons from stores within a distance of 20. Moving the having condition to a where clause should do what you want:
SELECT sum(couponscount) as count
FROM `coupons`
WHERE `restaurant` IN (SELECT `storename`
FROM `stores`
WHERE `status` = 'active' AND
((ACOS(SIN(-27.561264299999998 * PI()/180) * SIN(latitude * PI()/180) + COS(-27.561264299999998 * PI()/180) * COS(latitude * PI()/180) * COS((153.07304890000003 – longitude) * PI()/180)) *180 / PI( )) *60 * 1.1515) <= 20
);
You had a major syntax problem because your subquery returned two columns. When you use a subquery with in, you can only return one column, in this case, storename. I moved the code for the distance calculation to the where clause. No having clause is needed either in the subquery or the outer query.
I recently posted this question: getting distance between two points using google gps api with php
and I received a reply which was awesome however I had some questions about the person's response and due to my low/new status to this site I wasn't able to comment back. In response to my question the other user posted this query
**
SELECT a.*, 3956 * 2 * ASIN(SQRT( POWER(SIN(($lat - lat) * pi()/180 / 2), 2) + COS($lat * pi()/180) * COS(lat * pi()/180) *
POWER(SIN(($long - longi) * pi()/180 / 2), 2) )) as distance
FROM table
GROUP BY id HAVING distance <= 500
ORDER by distance ASC**
I had a few questions about this query and was hoping somebody could help.
1.What is the a.*? I'm not super advanced in sql but pretty efficient and have never seen something like this. I don't know if it is supposed to represent an arbritrary field or an actual field in my table
2.Since I'm doing this in php the query will go in quotes which will then make this query syntax slightly different. I was wondering if someone knew what the query would look like in quotes.
3.There is also "GROUP BY id" in this query. I do have an id field in my table that I'm querying from. Is this "id" associated with my id field in my table?
any help would be awesome.
Your query should be like this :-
a is table alias here.
SELECT a.*, 3956 * 2 * ASIN(SQRT( POWER(SIN(($lat - lat) * pi()/180 / 2), 2) + COS($lat * pi()/180) * COS(lat * pi()/180) *
POWER(SIN(($long - longi) * pi()/180 / 2), 2) )) as distance
FROM table AS a
GROUP BY id HAVING distance <= 500
ORDER by distance ASC
Or you can use simple
SELECT *, 3956 * 2 * ASIN(SQRT( POWER(SIN(($lat - lat) * pi()/180 / 2), 2) + COS($lat * pi()/180) * COS(lat * pi()/180) *
POWER(SIN(($long - longi) * pi()/180 / 2), 2) )) as distance
FROM table
GROUP BY id HAVING distance <= 500
ORDER by distance ASC
I'm using a slightly-modified version of the geocoded gem which returns this query when I call near on my model (calling Deal.near(southwest), where southwest is an array of geo coordinates):
SELECT
deals.*,
3958.755864232 * 2 * ASIN(SQRT(POWER(SIN((37.772476604436974 - addresses.lat) * PI() / 180 / 2), 2) + COS(37.772476604436974 * PI() / 180) * COS(addresses.lat * PI() / 180) * POWER(SIN((-122.42336332798004 - addresses.lng) * PI() / 180 / 2), 2) )) AS distance,
CAST(DEGREES(ATAN2( RADIANS(addresses.lng - -122.42336332798004), RADIANS(addresses.lat - 37.772476604436974))) + 360 AS decimal) % 360 AS bearing
FROM "deals"
INNER JOIN "companies" ON "companies"."id" = "deals"."company_id"
INNER JOIN "addresses" ON "addresses"."addressable_id" = "companies"."id" AND "addresses"."addressable_type" = 'Company'
WHERE (
addresses.lat BETWEEN 37.483013038215276 AND 38.06194017065867
AND addresses.lng BETWEEN -122.78956461309022 AND -122.05716204286986
)
GROUP BY
deals.id,
deals.created_at,
deals.updated_at,
deals.active,
deals.company_id,
deals.title,
deals.limitations,
deals.redemption_count,
addresses.lat,
addresses.lng
HAVING 3958.755864232 * 2 * ASIN(SQRT(POWER(SIN((37.772476604436974 - addresses.lat) * PI() / 180 / 2), 2) + COS(37.772476604436974 * PI() / 180) * COS(addresses.lat * PI() / 180) * POWER(SIN((-122.42336332798004 - addresses.lng) * PI() / 180 / 2), 2) )) <= 20
ORDER BY 3958.755864232 * 2 * ASIN(SQRT(POWER(SIN((37.772476604436974 - addresses.lat) * PI() / 180 / 2), 2) + COS(37.772476604436974 * PI() / 180) * COS(addresses.lat * PI() / 180) * POWER(SIN((-122.42336332798004 - addresses.lng) * PI() / 180 / 2), 2) )) ASC
My issue is that this will return multiple Deal records if that Deal's company has multiple Addresses, which I don't want.
In MySQL, I could just omit address.lat, address.lng in the GROUP_BY clause and it will properly group the records, but I can't do this in PostgreSQL.
I know I could wrap the whole query above in another SELECT and GROUP_BY, like this:
SELECT
id, created_at, updated_at, active, title, punches_to_complete, company_id, description, lat, lng, MIN(distance), bearing
FROM ( ... ) AS t
GROUP BY company_id
... where the ellipsis is the query from above. That (I believe) should get me the desired result in both MySQL and PostgreSQL.
The only problem is that I have no idea how to write this in ARel!
I had tried the following, a la this tip from the ARel guru, but I couldn't really make it work quite right (calling to_sql as the OP had said fixed his issue escapes the quotes, which freaks PostgreSQL out).
Can anyone help me with this???
UPDATE:
I've managed to get this done with an additional scope, like so:
scope :nearest, lambda { |coords|
subquery = "(#{Deal.near(coords).to_sql}) AS t1"
columns = Deal.columns.map{ |c| c.name }.join(',')
Deal.select(columns)
.select('MIN(distance) AS distance')
.from(subquery)
.group(columns)
.order('distance ASC')
}
However, this totally breaks chainability, as now I cannot call something like current_user.deals.nearest(coords), since that tags on an additional WHERE deals.user_id = 1 to the query outside of the subselect. I tried compensating for this by moving this logic into a class method and blanking the wheres clause on the SelectManager manually, like this:
def self.nearest(coords)
subquery = "(#{Deal.near(coords).to_sql}) AS t1"
columns = Deal.columns.map{ |c| c.name }.join(',')
query = Deal.select(columns)
.select('MIN(distance) AS distance')
.from(subquery)
.group(columns)
.order('distance ASC')
query.arel.ast.cores[0].wheres = []
query
end
... but that doesn't seem to work either: the additional WHERE clause is still appended:
Failure/Error:
#user.deals.nearest(southwest).first.distance.to_f.round(2).should ==
ActiveRecord::StatementInvalid:
Mysql2::Error: Unknown column 'deals.user_id' in 'where
clause': SELECT id,created_at,updated_at,user_id,company_id,
MIN(distance) AS distance FROM (SELECT deals.*, 3958.755864232 * 2 *
ASIN(SQRT(POWER(SIN((37.772476604436974 - addresses.lat) * PI() / 180
/ 2), 2) + COS(37.772476604436974 * PI() / 180) * COS(addresses.lat *
PI() / 180) * POWER(SIN((-122.42336332798004 - addresses.lng) * PI() /
180 / 2), 2) )) AS distance, CAST(DEGREES(ATAN2( RADIANS(addresses.lng
- -122.42336332798004), RADIANS(addresses.lat - 37.772476604436974)))
+ 360 AS decimal) % 360 AS bearing FROM deals INNER JOIN companies
ON companies.id = deals.company_id INNER JOIN addresses ON
addresses.addressable_id = companies.id AND
addresses.addressable_type = 'Company' WHERE deals.user_id =
26 AND (addresses.lat BETWEEN 37.483013038215276 AND 38.06194017065867
AND addresses.lng BETWEEN -122.78956461309022 AND -122.05716204286986)
GROUP BY
deals.id,deals.created_at,deals.updated_at,deals.user_id,deals.company_id,
addresses.lat, addresses.lng HAVING 3958.755864232 * 2 *
ASIN(SQRT(POWER(SIN((37.772476604436974 - addresses.lat) * PI() / 180
/ 2), 2) + COS(37.772476604436974 * PI() / 180) * COS(addresses.lat *
PI() / 180) * POWER(SIN((-122.42336332798004 - addresses.lng) * PI() /
180 / 2), 2) )) <= 20 ORDER BY 3958.755864232 * 2 *
ASIN(SQRT(POWER(SIN((37.772476604436974 - addresses.lat) * PI() / 180
/ 2), 2) + COS(37.772476604436974 * PI() / 180) * COS(addresses.lat *
PI() / 180) * POWER(SIN((-122.42336332798004 - addresses.lng) * PI() /
180 / 2), 2) )) ASC) AS t1 WHERE deals.user_id = 26 GROUP BY
id,created_at,updated_at,user_id,company_id ORDER BY distance ASC
LIMIT 1
Is what I'm trying to do even possible with ARel? The additional scopes above feel really dirty to me (parsing the subquery to raw SQL? I thought ARel was supposed to make it so I never did that!)
Related question: Can ARel formulate cross-db queries for CTEs (Common Table Expressions)?