retrieve quantity data from two tables by id and date range - sql-server

Question

I have two table like
ItemTable_One
id itemID Date qty
===================================================
1 1 2015-07-1 10
2 1 2015-07-3 20
3 2 2015-07-5 30
4 2 2015-07-7 40
ItemTable_Two
id itemID Date qty
===================================================
1 1 2015-07-2 50
2 1 2015-07-4 60
3 3 2015-07-6 70
4 3 2015-07-8 80
I want to retrieve data where itemID is equal to 1 in a date range.
For example ( date range between 2015-07-1 and 2015-07-30 )
itemID Date ItemTableOne_qty ItemTableTwo_qty
============================================================================
1 2015-07-1 10 0
1 2015-07-3 20 0
1 2015-07-2 0 50
1 2015-07-4 0 60
I've tried union join and subquery to do it, but I'm very weak in sql query.

Answer 1

You can use UNION ALL to get all the data you need:
SELECT ItemTable_One.itemID, ItemTable_One.Date, ItemTable_One.qty as ItemTableOne_qty, 0 as ItemTableTwo_qty
FROM ItemTable_One
WHERE ItemTable_One.itemID = 1 AND
ItemTable_One.Date BETWEEN '2015-07-01' AND '2015-08-01'
UNION ALL
SELECT ItemTable_Two.itemID, ItemTable_Two.Date, 0 as ItemTableOne_qty, ItemTable_Two.qty as ItemTableTwo_qty
FROM ItemTable_One
WHERE ItemTable_Two.itemID = 1 AND
ItemTable_Two.Date BETWEEN '2015-07-01' AND '2015-08-01'

Answer 2

You can use a FULL OUTER JOIN:
SELECT COALESCE(t1.itemID, t2.itemID) AS itemID,
COALESCE(t1.[Date], t2.[Date]) AS [Date],
COALESCE(t1.qty, 0) AS ItemTableOne_qty,
COALESCE(t2.qty, 0) AS ItemTableTwo_qty
FROM ItemTable_One AS t1
FULL OUTER JOIN ItemTable_Two AS t2 ON t1.itemID = t2.itemID AND t1.[Date] = t2.[Date]
WHERE COALESCE(t1.itemID, t2.itemID) = 1 AND
COALESCE(t1.[Date], t2.[Date]) BETWEEN '2015-07-01' AND '2015-07-31'
ORDER BY COALESCE(t1.[Date], t2.[Date])
This will put records having the same [Date] value in the source tables, into the same row of the output table.
If records of ItemTable_One always have separate [Date] values from records of ItemTable_Two, then the UNION solution proposed in other answers is preferable.
Demo here

Answer 3

Try this:
select itemID, Date, qty as ItemTableOne_qty, 0 as ItemTableTwo_qty
from ItemTable_One
where ItemID = 1
and date >= '20150701'
and date < '20150731'
union all
select itemID, Date, 0 as ItemTableOne_qty, qty as ItemTableTwo_qty
from ItemTable_Two
where ItemID = 1
and date >= '20150701'
and date < '20150731'
The upper limit for date is intentionally < than the wanted date +1 so that in case it's a datetime that has the time in it, the last day will be included too.

Answer 4

You do it with a FULL JOIN or a UNION ALL (depending on exact required output)
FULL JOIN
A FULL JOIN will allow you to get results like you show as long as there are no identical dates between the 2 tables. If such dates are present in both tables, you'd get a single row per date with both values filled.
The query to use is:
SELECT COALESCE(t1.itemID, t2.itemID) itemID, COALESCE(t1.Date, t2.Date) Date,
ISNULL(t1.qty, 0) ItemTableOne_qty, ISNULL(t2.qty, 0) ItemTableTwo_qty
FROM ItemTable_One t1 FULL JOIN ItemTable_Two t2
ON t1.itemID = t2.itemID AND t1.Date = t2.Date
WHERE COALESCE(t1.itemID, t2.itemID) = 1 AND
COALESCE(t1.Date, t2.Date) BETWEEN '2015-07-01' AND '2015-08-01'
UNION ALL
A UNION ALL will allow you to get resutls like you show and will create duplicate rows where the same date exists in both tables. There will always be at least 1 '0' value in any row.
The query to use is:
SELECT itemID, Date, qty ItemTableOne_qty, 0 ItemTableTwo_qty
FROM ItemTable_One
WHERE itemID = 1 AND Date BETWEEN '2015-07-01' AND '2015-08-01'
UNION ALL
SELECT itemID, Date, 0 ItemTableOne_qty, qty ItemTableTwo_qty
FROM ItemTable_Two
WHERE itemID = 1 AND Date BETWEEN '2015-07-01' AND '2015-08-01'

Answer 5

this will be the other way we can achieve the same result basing on your sample data
declare #ItemTable_One table (id int, itemID int, Date date, qty int)
insert into #ItemTable_One values
(1, 1, '2015-07-1', 10),
(2, 1, '2015-07-3', 20),
(3, 2, '2015-07-5', 30),
(4, 2, '2015-07-7', 40)
declare #ItemTable_Two table (id int, itemID int, Date date, qty int)
insert into #ItemTable_Two values
(1, 1, '2015-07-2', 50),
(2, 1, '2015-07-4', 60) ,
(3, 3, '2015-07-6', 70) ,
(4, 3, '2015-07-8', 80)
;with CTE AS (
select i.itemID As ItemID1,ii.itemID As ItemID2,i.Date As Dated1,ii.Date As Dated2,i.qty as qty,ii.qty As qty1 from #ItemTable_One i
CROSS APPLY (select * from #ItemTable_Two )ii
where i.id = ii.id AND i.itemID = ii.itemID
)
select * from (
Select ItemID1 As item,Dated1 AS Date, qty,'' as qty1 from CTE
UNION
Select ItemID2 As item,Dated2 AS Date,'' as qty,qty1 from CTE)T
--ORDER BY t.qty desc ,t.qty1

Answer 6

Use inline view to simplify horrid sql used in prior answers:
SELECT *
FROM (
SELECT COALESCE(t1.itemID, t2.itemID) AS itemID,
COALESCE(t1.[Date], t2.[Date]) AS [Date],
COALESCE(t1.qty, 0) AS ItemTableOne_qty,
COALESCE(t2.qty, 0) AS ItemTableTwo_qty
FROM ItemTable_One AS t1 FULL OUTER JOIN ItemTable_Two AS t2
ON t1.itemID = t2.itemID AND t1.[Date] = t2.[Date]
) AS v
WHERE v.itemID = 1 AND
v.[Date] BETWEEN '2015-07-01' AND '2015-07-31'
ORDER BY v.[Date]