How to get second lowest cost SQL - sql

Question

Need to find which invoice has the second-lowest total price among invoices that do not include a sale of a FiredAlways stove.
I can manage to get the lowest, but not the second lowest.
What I have:
SELECT TOP 1 WITH TIES
I.InvoiceNbr,
I.InvoiceDt,
I.TotalPrice
FROM INVOICE I
WHERE EXISTS(
SELECT TOP 2 WITH TIES
I.InvoiceNbr
FROM INVOICE I
WHERE EXISTS (
SELECT FK_InvoiceNbr
FROM INV_LINE_ITEM
WHERE FK_StoveNbr NOT IN
(SELECT S.SerialNumber
FROM STOVE AS S
WHERE S.Type = 'FiredAlways'))
ORDER BY I.TotalPrice DESC)
GROUP BY I.InvoiceNbr, I.InvoiceDt, I.TotalPrice
ORDER BY I.TotalPrice ASC;
Data:
[INVOICE](
[InvoiceNbr] [numeric](18, 0) NULL,
[InvoiceDt] [datetime] NULL,
[TotalPrice] [numeric](18, 2) NULL,
[FK_CustomerID] [numeric](18, 0) NULL,
[FK_EmpID] [numeric](18, 0) NULL
[INV_LINE_ITEM](
[LineNbr] [numeric](18, 0) NULL,
[Quantity] [numeric](18, 0) NULL,
[FK_InvoiceNbr] [numeric](18, 0) NULL,
[FK_PartNbr] [numeric](18, 0) NULL,
[FK_StoveNbr] [numeric](18, 0) NULL,
[ExtendedPrice] [numeric](18, 2) NULL
[STOVE](
[SerialNumber] [int] NOT NULL,
[Type] [char](15) NOT NULL,
[Version] [char](15) NULL,
[DateOfManufacture] [smalldatetime] NULL,
[Color] [varchar](12) NULL,
[FK_EmpId] [int] NULL,
Wanted Output:
Invoice # date Price
--------- ------------ -------
206 02/03/2002 28.11

Answer 1

Two general approaches to get the nth lowest:
DECLARE #tbl TABLE(SomeInt INT);
INSERT INTO #tbl VALUES(10),(2),(35),(44),(52),(56),(27);
--Use a TOP n on the inner select and a TOP 1 with a reverse order on the outer:
SELECT TOP 1 innertbl.SomeInt
FROM
(
SELECT TOP 2 SomeInt
FROM #tbl
GROUP BY SomeInt
ORDER BY SomeInt
) AS innertbl
ORDER BY innertbl.SomeInt DESC;
--use a CTE with DENSE_RANK() (thx to dnoeth for the hint)
WITH AddSortNumber AS
(
SELECT SomeInt
,DENSE_RANK() OVER(ORDER BY SomeInt) AS SortNumber
FROM #tbl
)
SELECT SomeInt
FROM AddSortNumber
WHERE SortNumber=2

Answer 2

Try This:
WITH cte AS
(
SELECT
I.InvoiceNbr,
I.InvoiceDt,
I.TotalPrice,
dense_rank() over( ORDER BY I.TotalPrice ASC) as dnrnk
FROM INVOICE I
INNER JOIN
Inv_LineITEM
ON InvoiceNbr = FK_InvoiceNbr
INNER JOIN
Stove
ON
FK_StoveNbr = SerialNumber
WHERE Type != 'FiredAlways'
)
select InvoiceNbr,
InvoiceDt,
TotalPrice from cte where dnrnk=2

Answer 3

SELECT TOP 1 TotalPrice FROM (
SELECT TOP 2 TotalPrice FROM invoice
ORDER BY TotalPrice DESC
) AS em ORDER BY TotalPrice ASC
Essentially:
Find the top 2 TotalPrice in descending order.
Of those 2, find the top TotalPrice in ascending order.
The selected value is the second-highest TotalPrice.
If the TotalPrice isn't distinct, you can use SELECT DISTINCT TOP ... instead.