SQL Server : creating a view from 2 tables - sql

Question

I have 2 tables, one with hoppers and the ingredients in them (Recorded once a day or when ingredients are changed)
Example:
Hoppers | Ingredients | Timestamp
--------+---------------+----------------------
Hop_1 | Ing_A | 8/22/2016 06:00:00
Hop_2 | Ing_B | 8/22/2016 06:00:00
etc...
And I have a second table that has totals used from each hopper recorded every hour
Example:
Name | Value | Timestamp
-------------------+----------+---------------------
Hop_1 Daily Total | 100 | 8/22/2016 11:00:00
Hop_1 Run Total | 30 | 8/22/2016 11:00:00
etc...
I would like to create a view that shows amount produced from each hopper and says the name.
Example:
Hop_1 Ingredient | Hop_1 Daily | Hop_1 Run | Timestamp
-----------------+-------------+-----------+-------------------
Ing_A | 100 | 30 | 8/22/2016 11:00:00
Sorry if it doesn't look good, I'm new at formatting

Answer 1

For the record I don't really think that structure is the best idea because it requires dynamic sql to pull it off with a couple of loops and lots of LEFT SELF JOINS. But here you go:
IF OBJECT_ID('tempdb..#Ingredients') IS NOT NULL
BEGIN
DROP TABLE #Ingredients
END
IF OBJECT_ID('tempdb..#Totals') IS NOT NULL
BEGIN
DROP TABLE #Totals
END
CREATE TABLE #Ingredients (Hoppers VARCHAR(25), Ingredeients VARCHAR(25), [Timestamp] DATETIME)
CREATE TABLE #Totals (Name VARCHAR(50), Value INT, [Timestamp] DATETIME)
INSERT INTO #Ingredients (Hoppers, Ingredeients, [Timestamp])
VALUES ('Hop_1','Ing_A','8/22/2016 06:00:00'),('Hop_2','Ing_B','8/22/2016 06:00:00'),('Hop_3','Ing_C','8/22/2016 06:00:00')
INSERT INTO #Totals (Name, Value, [Timestamp])
VALUES ('Hop_1 Daily Total',100,'8/22/2016 11:00:00'),('Hop_1 Run Total',30,'8/22/2016 11:00:00'),('Hop_1 Run Total',60,'8/22/2016 09:00:00')
,('Hop_2 Daily Total',500,'8/22/2016 11:00:00'),('Hop_2 Run Total',10,'8/22/2016 11:00:00'),('Hop_2 Run Total',5,'8/22/2016 10:00:00')
,('Hop_3 Daily Total',400,'8/22/2016 11:00:00'),('Hop_3 Run Total',85,'8/22/2016 11:00:00'),('Hop_3 Run Total',65,'8/22/2016 10:00:00')
DECLARE #HopperCount INT
SELECT #HopperCount = COUNT(DISTINCT i.Hoppers)
FROM
#Ingredients i
INNER JOIN #Totals t
ON t.Name LIKE i.Hoppers + '%'
DECLARE #I INT = 1
DECLARE #Sql NVARCHAR(MAX)
SET #Sql = '
;WITH cte AS (
SELECT
i.Hoppers
,i.Ingredeients
,Value
,t.[Timestamp]
,CASE WHEN t.Name LIKE ''%Daily%'' THEN 1 ELSE 0 END as IsDaily
,ROW_NUMBER() OVER (PARTITION BY i.Hoppers, t.name ORDER BY t.[Timestamp] DESC) as RunRowNum
,DENSE_RANK() OVER (PARTITION BY 1 ORDER BY i.Hoppers) as HooperNumber
FROM
#Ingredients i
INNER JOIN #Totals t
ON t.Name LIKE i.Hoppers + ''%''
AND i.[Timestamp] <= t.[Timestamp]
)
SELECT
c.Ingredeients AS [Hop_' + CAST(#I AS VARCHAR(10)) + ' Ingredient]
,SUM(CASE WHEN c.IsDaily = 1 THEN c.Value END) AS [Hop_' + CAST(#I AS VARCHAR(10)) + ' Daily]
,SUM(CASE WHEN c.IsDaily = 0 THEN c.Value END) AS [Hop_' + CAST(#I AS VARCHAR(10)) + ' Run]
,MAX(c.[Timestamp]) AS [Hop_' + CAST(#I AS VARCHAR(10)) + ' Timestamp] '
SET #I = 2
WHILE #I <= ISNULL(#HopperCount,0)
BEGIN
SET #Sql = #Sql + '
,c'+ CAST(#I AS VARCHAR(10)) + '.Ingredeients AS [Hop_' + CAST(#I AS VARCHAR(10)) + ' Ingredient]
,SUM(CASE WHEN c'+ CAST(#I AS VARCHAR(10)) + '.IsDaily = 1 THEN c' + CAST(#I AS VARCHAR(10)) + '.Value END) AS [Hop_' + CAST(#I AS VARCHAR(10)) + ' Daily]
,SUM(CASE WHEN c' + CAST(#I AS VARCHAR(10)) + '.IsDaily = 0 THEN c' + CAST(#I AS VARCHAR(10))+ '.Value END) AS [Hop_' + CAST(#I AS VARCHAR(10)) + ' Run]
,MAX(c' + CAST(#I AS VARCHAR(10)) + '.[Timestamp]) AS [Hop_' + CAST(#I AS VARCHAR(10)) + ' Timestamp] '
SET #I = #I + 1
END
SET #Sql = #Sql + '
FROM
cte c '
SET #I = 2
WHILE #I <= ISNULL(#HopperCount,0)
BEGIN
SET #Sql = #Sql + '
LEFT JOIN cte c' + CAST(#I AS VARCHAR(10)) + '
ON c.HooperNumber + ' + CAST(#I - 1 AS VARCHAR(10)) + ' = c' + CAST(#I AS VARCHAR(10)) + '.HooperNumber
AND c' + CAST(#I AS VARCHAR(10))+ '.RunRowNum = 1
AND c.IsDaily = c' + CAST(#I AS VARCHAR(10)) + '.IsDaily '
SET #I = #I + 1
END
SET #Sql = #Sql + '
WHERE
c.HooperNumber = 1
AND c.RunRowNum = 1
GROUP BY
c.Ingredeients
'
SET #I = 2
WHILE #I <= ISNULL(#HopperCount,0)
BEGIN
SET #Sql = #Sql + ',c' + CAST(#I AS VARCHAR(10)) + '.Ingredeients
'
SET #I = #I + 1
END
EXECUTE (#sql)

Answer 2

You could use a Pivot table for your need.
Here's a link : https://technet.microsoft.com/en-us/library/ms177410(v=sql.105).aspx