Comparing two tables

Question

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SQL-Server-2014

Hi Am having a small problem trying to compare two table. The comparism work fine when i choose two colums BuT if i choose more then two it gives me a different solution
Let say i have these tables:

C#

T1
[Products]  [Area]   [Price]   [Finance]
Apple        20        500        BA
Apple        20        200        LA
Apple        20        NULL       BA
Orange       10        50         L6
Kiwi         31        250        ZS
Kiwi         31        150        BA
Mango        14        25         F

C#

T2
[Products]  [Area]   [Price]   [Finance]
Cherry       02        221        LB
Cherry       02        551        LB
Cherry       02        75         LA
Apple        20        500        BA
Blueberry    15        125        ZS
Blueberry    15        135        F
Kiwi         31        150        BA
Kiwi         31        250        ZS
Banana       50        255        L6
Banana       50        355        L6
Banana       50        121        BA
Mango        14         25        F

Now i wanna compare and get the results of data which are in T2 BUT not in T1
Something like:

C#

SELECT Products,Price,Finance FROM T2
EXCEPT
SELECT Products,Price,Finance FROM T1

Alternative

SQL

SELECT DISTINCT Products,Price,Finance FROM T2
EXCEPT
SELECT DISTINCT Products,Price,Finance FROM T1

I wanna have a result like this:

C#

[Products]        [Price]   [Finance]
Cherry              221        LB
Cherry              551        LB
Cherry              75         LA
Blueberry           125        ZS
Blueberry           135        F
Banana              255        L6
Banana              355        L6
Banana              121        BA

Can somebody please help?

Posted 29-Oct-14 22:53pm

mikybrain1

Updated 30-Oct-14 4:36am

v3

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Comments

Maciej Los 30-Oct-14 16:29pm

I have no idea what you mean b saying "compare ... if i choose more than 2 columns"...

mikybrain1 30-Oct-14 16:42pm

As i described in my question. i have two tables and wanna know whats new in T2. i wanna get something like the result table.
Would be helpful if u can help

Maciej Los 30-Oct-14 16:44pm

Is there any PK [^]?

mikybrain1 30-Oct-14 16:51pm

Unfortunately no PK
I need the new products in T2 and it coresponding prices and finances

Maciej Los 30-Oct-14 17:16pm

Please, see my answer ;)

mikybrain1 5-Nov-14 2:54am

Hi Maciej Los
I'm trying to implement your solution sugesstion a stroed procedure but it keep giving me the Error
"Incorrect syntax near Keyword Group". What am i doing wrong?

SET @Dynamictbl = N'SELECT [Products], [Price], [Finance]

FROM (
SELECT [Products], [Price], [Finance] FROM ' + @Table_Name + ' WHERE [Area] = ''PB''' +
' EXCEPT
SELECT [Products], [Price], [Finance]
FROM ' + @Table_Name2 + ' WHERE [Area] = ''PB''' +
')' +
' GROUP BY [Products], [Price], [Finance]
ORDER BY [Products] DESC '

Maciej Los 5-Nov-14 3:27am

You forgot to add alias. After ) and before GROUP add AS T, for example.

2 solutions

Solution 1

I think you could use something like

SQL

select key from t2 where key not in (select key from t1)

now, you'll note Ive used 'key' .. iirc, when I first started sql and had to do something like this, I think I basically concatenated the column values together to form a single string... so, I'd try something like (assuming they are string columns or you can stringify them)

SQL

select products+price+finance as key from t2 where key not in (select products+price+finance from t1);

nb if your sql variant doesn't support '+' for string concatenation, you might need to try 'concat' function

you may be able to do the same thing without concatenating the fields together - I cant try it out right now sorry

Posted 29-Oct-14 23:11pm

Garth J Lancaster

Comments

mikybrain1 30-Oct-14 9:27am

hi! It wasn' helpful

[no name] 30-Oct-14 11:35am

Why not? Do you recognized the meaning of "key"?

mikybrain1 30-Oct-14 10:22am

Any suggestions? Please

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Maciej Los · Accepted Answer · 2014-10-30T11:16:00

First of all, your query looks OK.

Here is what i tested:

SQL

DECLARE @T1 TABLE ([Products] VARCHAR(30), [Area] VARCHAR(3), [Price] INT, [Finance] VARCHAR(5))

INSERT INTO @T1([Products], [Area], [Price], [Finance])
VALUES('Apple', '20', 500, 'BA'),
('Apple', '20', 200, 'LA'),
('Apple', '20', NULL, 'BA'),
('Orange', '10', 50, 'L6'),
('Kiwi', '31', 250, 'ZS'),
('Kiwi', '31', 150, 'BA'),
('Mango', '14', 25, 'F')

DECLARE @T2 TABLE ([Products] VARCHAR(30), [Area] VARCHAR(3), [Price] INT, [Finance] VARCHAR(5))
INSERT INTO @T2 ([Products], [Area], [Price], [Finance])
VALUES('Cherry', '02', 221, 'LB'),
('Cherry', '02', 551, 'LB'),
('Cherry', '02', 75, 'LA'),
('Apple', '20', 500, 'BA'),
('Blueberry', '15', 125, 'ZS'),
('Blueberry', '15', 135, 'F'),
('Kiwi', '31', 150, 'BA'),
('Kiwi', '31', 250, 'ZS'),
('Banana', '50', 255, 'L6'),
('Banana', '50', 355, 'L6'),
('Banana', '50', 121, 'BA'),
('Mango', '14', 25, 'F')

SELECT *
FROM (
	SELECT *
	FROM @T2  
	EXCEPT
	SELECT *
	FROM @T1 
) AS T
ORDER BY T.Products DESC

Result:

Products	Area	Price	Finance
Cherry		02		75		LA
Cherry		02		221		LB
Cherry		02		551		LB
Blueberry	15		125		ZS
Blueberry	15		135		F
Banana		50		121		BA
Banana		50		255		L6
Banana		50		355		L6

Returns exactly what you want.