SQL UNION OR JOIN 2 SELECTION - sql

Question

I will made a simple exemple to understand better what I'm trying to do:
I have Selection 1 witch takes data from 4 tables with severals inner join. The results is like image shown bellow:
I have Selection 2 witch takes data from another 4 tables.
The only difference between this 2 results of the selections is the column 4.
The results is like image shown bellow:
The results I want is like this:
If I make UNION ALL he put the values underneath (the result is with 20 rows), and I don't need like that.
If I Make Join between them I have 10x10=100 rows.
EXEMPLE LINK: SQLFiddle

Answer 1

Get data from both selection with inner joins and display only required columns from both selections
;WITH CTE1
AS
(
SELECT * FROM SELECTION1
)
,CTE2
AS
(
SELECT * FROM SELECTION2
)
SELECT
CTE1.UNAME,
CTE1.PRE_NAME,
CTE1.TIME,
CTE1.FIRST_VALUE,
CTE2.FINAL_VALUE
FROM CTE1
INNER JOIN CTE2
ON CTE1.UNAME=CTE2.UNAME
AND CTE1.PRE_NAME=CTE2.PRE_NAME
AND CTE1.TIME=CTE2.TIME
UPDATE
FIDDLE
I have tried to get something unique from both tables so used ROW_NUMBER(). This might help. Joins with duplicate values in both tables will make it 10x10 rows only which you don't want.
WITH CTE1
AS
(
SELECT ROW_NUMBER() OVER (ORDER BY U_NAME) AS NO, * FROM SELECTION1
)
,CTE2
AS
(
SELECT ROW_NUMBER() OVER (ORDER BY U_NAME) AS NO,* FROM SELECTION2
)
SELECT
CTE1.U_NAME,
CTE1.PRE_NAME,
CTE1.TIME,
CTE1.FIRST_VALUE,
CTE2.FINAL_VALUE
FROM CTE1
INNER JOIN CTE2
ON CTE1.NO=CTE2.NO
UPDATE 2
WITH CTE1
AS
(
SELECT ROW_NUMBER() OVER (ORDER BY UD_NAME) AS NO, * FROM
(
SELECT R0507UNIT_.R0507NAME_ AS UD_NAME,
R0101MAPAR.R0101NAME_ AS PRE_NAME,
TO_CHAR(D0903GSCHH.D0903TFROM + INTERVAL '2' HOUR, 'DD.MM.YYYY HH24:MI:SS') AS TIME_FROM,
D0904GSCHI.D0904POWER AS FINAL_POWER
FROM D0904GSCHI
INNER JOIN D0903GSCHH
ON
D0904GSCHI.D0903TFROM = D0903GSCHH.D0903TFROM
AND D0904GSCHI.D0903ID___ = D0903GSCHH.D0903ID___
INNER JOIN R0101MAPAR
ON
D0903GSCHH.R0101ID___ = R0101MAPAR.R0101ID___
INNER JOIN R0507UNIT_
ON
D0903GSCHH.R0507ID___=R0507UNIT_.R0507ID___
WHERE D0903GSCHH.D0903TFROM >= TO_DATE('07.02.2017 20:00','DD.MM.YYYY HH24:MI:SS')
AND D0903GSCHH.D0903TFROM < TO_DATE('08.02.2017 20:00','DD.MM.YYYY HH24:MI:SS')
--AND R0507UNIT_.R0507NAME_ = 'BUCV3'
) AS A --THIS IS AN ALIAS
)

Answer 2

SELECT A.U_NAME,
A.PRE_NAME,
A.TIME,
A.FIRST_VALUE,
B.FINAL_VALUE
FROM Selection1 AS A
INNER JOIN Selection2 AS B
ON A.U_NAME = B.U_NAME
AND A.PRE_NAME = B.PRE_NAME
AND A.TIME = B.TIME

Answer 3

You need to join the two queries together using an INNER JOIN:
SELECT s1.U_NAME
,s1.PRE_NAME
,s1.TIME
,s1.FIRST_VALUE
,s2.FINAL_VALUE
FROM (
-- First query
SELECT U_NAME, PRE_NAME, TIME, FIRST_VALUE
FROM Selection1
) s1
INNER JOIN (
-- Second query
SELECT U_NAME, PRE_NAME, TIME, FINAL_VALUE
FROM Selection1
) s2
ON s1.U_NAME = s2.U_NAME
AND s1.PRE_NAME = s2.PRE_NAME
AND s1.TIME = s2.TIME
;

Answer 4

If I consider the two inputs as tables, you can achieve the desired results with another join between the these tables (But i will not suggest it due to performance issues).
SELECT
TBL1.U_NAME,TBL1.PRE_NAME,TBL1.TIME,TBL1.FIRST_VALUE,TBL2.FINAL_VALUE FROM
FROM FIRSTTABLE TBL1 INNER JOIN SECONDTABLE TBL2 ON TBL1.U_NAME=TBL2.U_NAME
AND TBL1.PRE_NAME=TBL2.PRE_NAME AND TBL1.TIME=TBL2.TIME
I see your already have some inner joins to get data in FirstTable and SecondTable. If both of these queries are using common tables to bring data, you can do it in a single query also. If I am understanding your problem correctly, Union is not required for the kind of resultset you are looking for.
If you can provide the complete query it would give more context and can provide a better solution.

Answer 5

BEGIN TRAN
CREATE TABLE #temp (U_Name Nvarchar(20),PRE_Name Nvarchar(20),Time Datetime,firstValue int)
CREATE TABLE #temp1 (U_Name Nvarchar(20),PRE_Name Nvarchar(20),Time Datetime,firstValue int)
INSERT INTO #temp
Select 'GV','NMOP','10.02.2017', 90 UNION ALL
Select 'GV','NMOP','10.02.2017', 100 UNION ALL
Select 'GV','NMOP','10.02.2017', 120 UNION ALL
Select 'GV','NMOP','10.02.2017', 300 UNION ALL
Select 'GV','NMOP','10.02.2017', 200 UNION ALL
Select 'GV','NMOP','10.02.2017', 100 UNION ALL
Select 'GV','NMOP','10.02.2017', 50 UNION ALL
Select 'GV','NMOP','10.02.2017', 60 UNION ALL
Select 'GV','NMOP','10.02.2017', 70 UNION ALL
Select 'GV','NMOP','10.02.2017', 10
INsert into #temp1
Select 'GV','NMOP','10.02.2017', 60 UNION ALL
Select 'GV','NMOP','10.02.2017', 52 UNION ALL
Select 'GV','NMOP','10.02.2017', 10 UNION ALL
Select 'GV','NMOP','10.02.2017', 300 UNION ALL
Select 'GV','NMOP','10.02.2017', 33 UNION ALL
Select 'GV','NMOP','10.02.2017', 100 UNION ALL
Select 'GV','NMOP','10.02.2017', 50 UNION ALL
Select 'GV','NMOP','10.02.2017', 56 UNION ALL
Select 'GV','NMOP','10.02.2017', 99 UNION ALL
Select 'GV','NMOP','10.02.2017', 10
SELECT ROW_NUMBER() OVER (ORDER BY U_NAME) AS Rowno,a.U_Name, a.PRE_Name,a.Time,a.firstValue into #t from #temp a
SELECT ROW_NUMBER() OVER (ORDER BY U_NAME) AS Rowno, b.U_Name, b.PRE_Name,b.Time,b.firstValue as finalValue INTO #TT from #temp1 b
SELECT a.U_Name,a.PRE_Name,a.Time,a.firstValue, b.finalValue
FROM #t a
INNER JOIN #TT b ON a.Rowno=b.Rowno AND a.U_Name=b.U_Name AND a.PRE_Name=b.PRE_Name AND a.time=b.Time
ROLLBACK TRAN