SQL Query to get data comparing 2 tables

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SQL Query to get data comparing 2 tables

Author

Topic

swapna.anu
Starting Member

3 Posts

Posted - 2011-09-30 : 09:22:20

Hi

Can any one tell me how to write a query to get data from a table when joined with another table comparing all the columns data which has data containing varchar, int, datetime, bit, tinyint etc.

For eg:

Table A

Col1 Col2 Col3 Col4

1 ABC Test 01/09/2011

2 XYZ Test1 02/09/2011

3 PQR Test2 10/09/2011

Table B

Col1 Col2 Col3 Clo4

1 AAA Test 02/08/2011

2 XYZ Test1 02/09/2011

4 BBB Test5 01/10/2011

Expected Results as below

Col1 Col2 Col3 Col4

1 ABC Test 01/09/2011

3 PQR Test2 10/09/2011

I need to compare all the columns in both the tables and return

1. if something different in both the tables

2. if something missing in Table B which is in A but don't need the records if missing in A but available in B

Please let me know how to make this work. I am not looking only for joins but any query which will make this task easy and will be able to use inside SP.

Thanks in advance.

swapna.anu
Starting Member

3 Posts

Posted - 2011-09-30 : 10:30:51

Got this working using the below query

SELECT S1.* FROM (SELECT checksum(*) AS CheckSumVal, * FROM Table1) s1
LEFT JOIN (SELECT checksum(*) AS CheckSumVal FROM Table2) s2
ON s1.checksumVal = s2.checksumval
WHERE s2.checksumval is null

Thanks.

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