sql server 2008 express - Compare rows in different table having same columns -

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i have 2 tables tbl_a , tbl_a_temp. both table have same schema. primary key differ since identity columns. there way can compare 2 rows in these 2 table , know if differ.i inserting data tbl_a_temp tbl_a, need compare make sure not inserting duplicate data in main tables.

regards, amit

i think should work you. basically, since don't have primary key join on, you'll need perform left join on other fields. if different, null check true:

select t.* tbl_a_temp t    left join tbl_a on        t.field1=a.field1 , t.field2=a.field2 , ... a.field1 null

i've seen others use checksum, have run issues myself returning false positives.


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