How to update a column with different values but all other row values r sam

Hi,
I have a table like this.
Col1 col2 col3 col4
10 20 30
10 20 30
10 20 30
i need to update col4 with different values coming from other table like this
Col1 col2 col3 col4
10 20 30 xxxx
10 20 30 yyyy
10 20 30 zzzz
how can i update the table. pls let me know how to use the where condition in the update stmt.
thanks,
jay
Edited by: user2558790 on Nov 20, 2009 12:26 PM

what is the logic for this kind of update...????
Greetings,
Sim

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