Comments on: Join for merging records

By: eabouzeid

eabouzeid — Mon, 12 Jul 2010 14:58:18 +0000

Thank you Carlos! This worked flawlessly.

By: carlosdl

carlosdl — Thu, 08 Jul 2010 15:47:02 +0000

If I understand correctly, and if this is a one-time operation, an easy (but probably not efficient) way to populate your new table would be creating a unique index on the serial number (if it doesn't exist) with the IGNORE_DUP_KEY option set to ON, and execute an INSERT-SELECT command from a union from your source tables. Something like this:

CREATE UNIQUE INDEX yourIndex ON yourFinalTable(serial_number) WITH (IGNORE_DUP_KEY = ON)

INSERT INTO yourFinalTable
SELECT * FROM table1
UNION SELECT * FROM table2
UNION SELECT * FROM table3
...

ALTER INDEX yourIndex ON yourFinalTable SET (IGNORE_DUP_KEY = OFF)

By: eabouzeid

eabouzeid — Wed, 07 Jul 2010 12:20:04 +0000

OK, maybe better if I explain practically. I have many different tables where each table represents a scan of the network that I performed gathering information about installed software on our network by computer user. Sometimes an individual may not be logged into the network to scan. I want to therefore merge all of the tables using the serial number of each computer so as to create one final table that has the results of all computers in the company but without duplicates. Thank you for your help Carlos.

By: carlosdl

carlosdl — Thu, 01 Jul 2010 15:32:51 +0000

I’m not sure I understand what you want to get as result. Can you post some example data from your tables and the results you would want to get ?