I want to compare count(*) value with max(count(*)) value without using whole query in subquery block. The related example is shown below. Please suggest me a shortest and best way to achieve the same result?
select ee.LocationName
from Employees ee
inner join EmployeeActivities ea on ee.Username = ea.Username
where ea.Activity = 'Hospital'
group by LocationName
having count(*) =
(
select max(VisitCount)
from (select LocationName, count(*) as VisitCount
from Employees e
inner join EmployeeActivities ea on e.Username = ea.Username
where ea.Activity = 'Hospital'
group by e.LocationName) as a
)
Use this:
select top 1 with ties ee.LocationName
from Employees ee
inner join EmployeeActivities ea on ee.Username = ea.Username
where ea.Activity = 'Hospital'
group by LocationName
order by count(*) desc
Just order descending by count and select top ones(with ties will select all groups with max count).
Related
I'm trying to create a script that synchronizes Sales and Inventory tables. For that I wrote an UPDATE on the Inventory table (which has 1 record per item of inventory present) like this:
UPDATE TOP (q.QuantitySold) i
SET i.Converted = 1,
i.CartID = q.CartID,
i.ReservedDate = GETDATE()
FROM Inventory i
INNER JOIN
(
SELECT product.ProductID, sales.CartID, COUNT(sales.ID) AS QuantitySold
FROM Products product
INNER JOIN Sales sales ON sales.ProductID = product.ProductID
WHERE <conditions>
GROUP BY product.ProductID, sales.CartID
) q ON q.ProductID = i.ProductID
WHERE i.Converted = 0 AND i.CartID IS NULL
But it's not working, error says q.QuantitySold couldn't be bound.
Is there a way to update N records of inventory (equal to the quantity sold) without using a cursor? I refuse to give up like that.
Note: this is a simplified version of the actual query.
You could use ROW_NUMBER to enumerate the inventory items that you need to update.
WITH cteProducts AS(
SELECT product.ProductID, sales.CartID, COUNT(sales.ID) AS QuantitySold
FROM Products product
INNER JOIN Sales sales ON sales.ProductID = product.ProductID
WHERE <conditions>
GROUP BY product.ProductID, sales.CartID
),
cteInventory AS(
SELECT *,
ROW_NUMBER() OVER( PARTITION BY ProductID ORDER BY (SELECT NULL)) AS rn /*Change the ORDER BY for an actual column if needed, probably for FIFO*/
FROM Inventory
WHERE i.Converted = 0
AND i.CartID IS NULL
)
UPDATE i
SET i.Converted = 1,
i.CartID = q.CartID,
i.ReservedDate = GETDATE()
FROM cteInventory i
INNER JOIN cteProducts q ON q.ProductID = i.ProductID
WHERE i.rn <= q.QuantitySold;
i need your help! I got some simple SQL skills, but this query kills me...
My Tables
Now i want the TOP5 WorkTimes on the Equipment (What Equipment got the longest WorkTime).
I want this OUTPUT:
MY Query:
SELECT
Equipment, EquipmentName, count(Equipment) as Count
FROM
Operations o
LEFT JOIN Orders ord ON ord.Id = o.[Order]
LEFT OUTER JOIN Equipments e ON ord.Equipment = e.EquipmentNumber
GROUP BY
Equipment, EquipmentName
ORDER BY Count DESC;
Another Question is how i can show o.Worktime?
i got an error with GroupBy...
please help me Thanks!
You can try this query:
select equip_nr,
(select equipmentname from table_equipments where equipmentnr = [to].equip_nr) equip_name,
sum(timeInMins) / 60.0 Worktime
from (
select (select equipmentnr from table_orders where id = [to].[order]) equip_nr,
case when workunittime = 'RH' then worktime * 60 else worktime end timeInMins
from table_operations [to]
where exists(select 1 from table_orders
where [to].[order] = id
and location = '152')
and [start] >= '2018-07-01 00:00:00.000' and [start] < '2018-08-01 00:00:00.000'
) [to] group by equip_nr
By the way, LEFT JOIN is equivalent to LEFT OUTER JOIN.
Just use SUM(worktime) as aggregate function, instead of COUNT(Equipment)
SELECT
e.[ID_Equipment]
, Name
, SUM( IIF(o.WorkUnitTime='MIN', worktime/60.0, worktime) ) as WorktimeMIN
FROM
Operations o
LEFT JOIN Orders ord ON ord.ID_Order = o.ID_Order
LEFT OUTER JOIN Equipment e ON ord.ID_Equipment = e.ID_Equipment
GROUP BY
e.[ID_Equipment]
, Name
ORDER BY
WorktimeMIN DESC
See SQL Fiddle here: http://sqlfiddle.com/#!18/5b5ed/11
I have a state table which has states assigned to different countries. There are cases where different countries have same state names. How can I get that. I am trying the following query. Am I right.?
SELECT Name , COUNT(*) count
FROM
[DB].[dbo].[State]
GROUP BY
Name
Having
COUNT(*) > 1
Above query gives correct result. But following query is that I am trying to fetch Country Names also. This is not working
SELECT st.Name , COUNT(*) count,co.Name
FROM [DB].[dbo].[State] st
INNER join [DB].[dbo].Country co on st.CountryID = co.ID
GROUP BY
st.Name,
co.Name
Having
COUNT(*) > 1
Yes, that's correct so I don't understand what is the question?
If you want it with the countries name and all the other information you can use EXISTS() :
SELECT * FROM [DB].[dbo].[State] t
WHERE EXISTS(SELECT 1 FROM [DB].[dbo].[State] s
WHERE t.state = s.state and t.country <> s.country)
EDIT: Try this
SELECT st.Name ,co.Name
FROM [DB].[dbo].[State] st
INNER join [DB].[dbo].Country co on st.CountryID = co.ID
WHERE EXISTS(SELECT 1 FROM [DB].[dbo].[State] st2
WHERE st.name = st2.name
HAVING COUNT(*) > 1)
Hope your Query is correct.,
SELECT st.Name,co.Name,COUNT(st.CountryID) [count]
FROM [DB].[dbo].[State] st
LEFT join [DB].[dbo].Country co on st.CountryID = co.ID
GROUP BY
st.Name,co.Name
Having
COUNT(st.CountryID) > 1
i have the following MS ACCESS query that i would like it to return results ordered by name and "paged" by "faking" a rownumber
select * from (SELECT *
FROM (SELECT
s.name as SHolderCategory,
c1.id,
c1.fmember,
c1.link,
m.name as category,
c1.name,
c1.address1,
c1.address2,
c1.city,
c1.state,
c1.zip,
(SELECT COUNT(c2.id) FROM orgs AS c2 WHERE c2.id <= c1.id) AS rownumber
FROM
((orgs AS c1 inner join membershipcls m on m.Id = c1.mClassID)
inner join SHolderscategories s on s.Id = c1.SHolderCategoryID
)
where c1.active = 1)
order by c1.name)
WHERE rownumber > 20 AND rownumber <=40
the problem here is that the ordering is done before the where clause which enforces paging.
so it ends up sorting one page at a time, rather than sorting the whole resultset then paging it...so the results are wrong because in page 1 i have names starting with a to g ... then in page 2 it comes back to names starting with c .... and so on
when i try to get the order clause out so that the query executes the paging first...Mr ACCESS is Angry!!! and tells me it is a COMPLEX query !!!!
any workaround for this?
try also this approach:
SELECT * FROM
(
SELECT TOP 20 *
FROM
(
SELECT TOP 40
s.name as SHolderCategory,
c1.id,
c1.fmember,
c1.link,
m.name as category,
c1.name,
c1.address1,
c1.address2,
c1.city,
c1.state,
c1.zip
FROM
orgs AS c1
inner join membershipcls m on m.Id = c1.mClassID
inner join SHolderscategories s on s.Id = c1.SHolderCategoryID
WHERE c1.active = 1
ORDER BY c1.name
) o
ORDER BY o.name DESC
) f ORDER BY f.name
I want to count the total number of order detail rows over all orders a customer has ever had.
This is my query
SELECT SUM(
(SELECT count(*)
FROM dbo.Order_Details
WHERE dbo.Order_Details.OrderID = dbo.Orders.OrderID))
FROM dbo.Orders
WHERE dbo.Orders.CustomerID = "123"
SQL Server is giving me an error "Cannot perform an aggregate function on an expression containing an aggregate or a subquery."
Any help with this would be appreciated.
SELECT COUNT(*)
FROM Orders
INNER JOIN Order_Details ON Orders.OrderID = Order_Details.OrderID
WHERE Orders.CustomerID = "123"
Shouldn't it just be:
SELECT count(*) FROM dbo.Order_Details, dbo.Orders
WHERE dbo.Order_Details.OrderID = dbo.Orders.OrderID
AND dbo.Orders.CustomerID = "123"
You don't need the sum() since the count(*) is already going to give you the total.
SELECT (SELECT count(*)
FROM dbo.Order_Details
WHERE dbo.Order_Details.OrderID = dbo.Orders.OrderID)
FROM dbo.Orders
WHERE dbo.Orders.CustomerID = "123"
The Count(*) is doing the summation for you. Just remove the SUM aggregate from your expression.
I should think something like the following should do what you want:
select count(1) from dbo.order_details d
join dbo.orders o on d.OrderId=o.OrderId
where dbo.orders.CustomerID="123"
The following assumes you have a column in the Order_Details table called OrderDetailID. If not, just substitute for the unique identifier for the order detail record.
SELECT COUNT(DISTINCT OD.OrderDetailID)
FROM Orders O
LEFT JOIN Order_Details OD on (OD.OrderId = O.OrderId)
WHERE O.CustomerID = "123"