Finding unmatched rows of 2 tables in SQL - sql

Question

I have 2 tables with 3 columns that are suppose to have the same information.
I would like have a query that selects only the rows that don't have a complete row match. Below is an example of the 2 tables I would like to match:
Table 1
ID FPRICE FPRODUCT
1 1 A
2 2 B
3 3 C
4 4 D
5 5 F
Table 2
ID TPRICE TPRODUCT
1 1 A
2 2 B
3 3 C
4 5 D
6 6 E
Desired Output:
ID FPRICE FPRODUCT TPRICE TPRODUCT
4 4 D 5 D
5 5 F NULL NULL
6 NULL NULL 6 E

Answer 1

Easier to verify if we build some DDL and fillwith sample data, but I think this would do it. It takes a full join to find records with a partial match and then filters out records with a full match.
sqlfiddle.com
CREATE TABLE Table1 (ID INT, FPRICE INT, FPRODUCT CHAR(1))
INSERT INTO Table1 (ID,FPRICE,FPRODUCT) VALUES
(1, 1, 'A')
,(2, 2, 'B')
,(3, 3, 'C')
,(4, 4, 'D')
,(5, 5, 'F')
CREATE TABLE TABLE2 (ID INT, TPRICE INT, TPRODUCT CHAR(1))
INSERT INTO Table2 (ID,TPRICE,TPRODUCT) VALUES
(1, 1, 'A')
,(2, 2, 'B')
,(3, 3, 'C')
,(4, 5, 'D')
,(6, 6, 'E')
SELECT *
FROM Table1 t1
FULL JOIN
Table2 t2 ON t1.ID = t2.ID
--EDIT: remove to exactly match the desired output
--OR t1.FPRICE = t2.TPRICE
--OR t1.FPRODUCT = t2.TPRODUCT
WHERE NOT ( t1.ID = t2.ID
AND t1.FPRICE = t2.TPRICE
AND t1.FPRODUCT = t2.TPRODUCT)
OR ( COALESCE(t1.ID,t1.FPRICE,T1.FPRODUCT) IS NULL
OR COALESCE(t2.ID,t2.TPRICE,T2.TPRODUCT) IS NULL)

Answer 2

Use full join:
select *
from Table1 t1
full join Table2 t2 on t1.ID = t2.ID and
t1.FPRICE = t2.FPRICE /*and
t1.FPRODUCT = t2.FPRODUCT*/
where t1.ID is null or t2.ID is null

Answer 3

It looks like you want to match on the id's and then compare the values:
select t1.id, t1.fprice, t1.fproduct, t2.fprice, t2.fproduct
from Table1 t1 full join
Table2 t2
on t1.ID = t2.ID
where (t1.ID is null or t2.ID is null) or -- no match as all
(t1.FPRICE <> t2.FPRICE or
t1.FPRODUCT <> t2.FPRODUCT
);
The where clause is a bit more complicated if the column values could be NULL, but your sample data does not have any examples of NULLs.

Answer 4

SELECT *
FROM Table1 t1
FULL JOIN Table2 t2 ON t2.ID = t1.ID
WHERE
t2.TPRICE <> t1.FPRICE
OR t2.TPRODUCT <> t1.FPRODUCT
OR t2.TPRICE IS NULL
OR t1.FPRICE IS NULL
OR t2.TPRODUCT IS NULL
OR t1.FPRODUCT IS NULL

Answer 5

Can you try this query?
SELECT DISTINCT t1.ID t1.FPRICE t1.FPRODUCT
from Table1 t1 LEFT JOIN Table2 ON
Table1.ID = Table2.ID AND Table1.FPRICE = Table2.TPRICE AND Table1.FPRODUCT= Table2.TPRODUCT
WHERE
Table1.ID is NULL or Table1.FPRICE is NULL or Table1.FPRODUCT is NULL
or Table2.TPRICE is NULL or Table2.TPRODUCT is NULL

Answer 6

I would format the answer from Michael1105 as:
SELECT ISNULL(t1.ID,t2.ID),t1.FPRICE,t1.FPRODUCT,t2.TPRICE,t2.TPRODUCT FROM Table_1 t1 FULL JOIN Table_2 t2 ON t2.ID = t1.ID WHERE t2.TPRICE
<>t1.FPRICE OR t2.TPRODUCT
<>t1.FPRODUCT OR t2.TPRICE IS NULL OR t1.FPRICE IS NULL OR t2.TPRODUCT IS NULL OR t1.FPRODUCT IS NULL
for your exact requirement.