Compare data between two tables with in single database - sql

Question

My requirement to compare two table data with in one database and stored the uncommon data in separate table named relation data within same database.
How to compare this tables data?
To compare is their any tools and can we stored uncommon data in separately table using any tool?
i forgot to tell one thing that two tables having same data but different column names that means for example first table having 20 columns and 2 and table having 50 columns but in that 4 columns are matched data with different number of rows and different column names in each table.based on these columns data matching i need to find rows and stored into another table

Answer 1

As an alternative to writing a SQL script, you could copy the entire results from both tables to a .csv file and then use win merge to compare the two:
http://winmerge.org/downloads/
I have used this technique in the past when comparing mass amounts of data and it has worked quite well.

Answer 2

This can be accomplished in t-sql with not a lot of effort. However in your question you were asking for a tool to accomplish this. If you are simply looking to purchase a tool to do this, at my job, we use the Redgate tools for deploying code from test to production, and I believe if you were a little creative you could get the SQL Data Compare Tool to do what you are asking for.
If you select and compare these two tables, it will generate a change script from one to the other. If you only take the changes from one, save off the script, then come back, click on the arrow and take only the changes from the source the other way, you should have the uncommon attributes.

Answer 3

Try this query, I think its work
insert into relational(r1,r2,r3,....rn)
(select s1,s2,s3,...sn from
information info where info.informationcity not in (select customercity from customer)
and info.informationstate not in (select customerstate from customer) )

Answer 4

Assuming you both tables have the same structure
Quick and dirty?
;WITH cte AS (
SELECT 1 AS OriginTable, *
FROM OriginTable1
UNION SELECT 2 AS OriginTable, *
FROM OriginTable2
)
SELECT {put here the list of all your columns}
INTO [YourDeltaTable]
FROM cte
GROUP BY {put here the list of all your columns}
HAVING COUNT(*) = 1

Answer 5

You can use the following query for inserting data into target table by retrieving data from multiple tables
insert into TargetTable(list_of_columns)
(select list of columns from
Table1 t1 join Table2 t2
on (t1.common_column != t2.common_column))
The src column list count and target column list count should be equal

Answer 6

Here's a simple example that assumes your table structures are the same
DECLARE #a table (
val char(1)
);
DECLARE #b table (
val char(1)
);
INSERT INTO #a (val)
VALUES ('A'), ('B'), ('C');
INSERT INTO #b (val)
VALUES ('B'), ('C'), ('D'), ('E');
DECLARE #mismatches table (
val char(1)
);
INSERT INTO #mismatches (val)
SELECT val -- All those from #a
FROM #a
EXCEPT -- Where not in #b
SELECT val
FROM #b;
INSERT INTO #mismatches (val)
SELECT val -- All those from #a
FROM #b
EXCEPT -- Where not in #b
SELECT val
FROM #a;
SELECT *
FROM #mismatches