Using CHECKSUM
Agree with Tom that CHECKSUM() is not unique. But my experience is that with a big data set (such as 10 million rows) there is ahigh chance that some of the changes will be missed. In a test I once...
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CHECKSUM() is not unique. There is a small chance you will not detect changes using this method.Please see: http://technet.microsoft.com/en-us/library/ms189788.aspxHowever, there is a small chance...
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As to insert new records in Table2, instead on joining on Charater fields I'm concatenating this fields using CHECKSUM and doing comparision with my surce table1 and loading data into table2.IS...
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I can show you a cleaner way to do a differential insert......create table table1( text1 varchar(100)null, text2 varchar(100) null , text3 varchar(100) null) create table table2( text1...
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What exactly are you trying to do?CHECKSUM() does not generate a unique checksum. Are you trying to determine if something changed so you can update the row?
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Anyone can give me the clear sql stmt, on how to use checksum for my above query
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I have converted to varchar, and when I run the query I get the GUID values, how do I compare this? Please bare with me, I haven't used CHECKSUM before.
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Covert non varchar to varchar and concatenate and generate md5 hash key thn compare old to new value. Thanks and Regards, Prajesh Please use Marked as Answer if my post solved your problem and use Vote...
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Sorry I didnt understand, can you please make this clear? and one of the field is tinyint in the select stmt
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Use MD5 Hash SELECT HashBytes('MD5', a.text1+ a.Text2+ a.Text3 )compare the concated value's md5 hash to new concarted md5 hash for faster comparisonThanks and Regards, Prajesh Please use Marked as...
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I have a table with fields of character values, and per day I will be getting approx 10 millions of records and from this I need to select the distinct fields and load into a dfferent table, for that...
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