Is there any order to the rows at all, apart from the col2 value? If not, how would you know which row to update? If col1 does have values in it like the ones shown, you'd use an update like:
UPDATE sometable SET somecolumn = '*' WHERE col1 IN (SELECT MIN(col1) FROM sometable GROUP BY col2)
Search and Browse the Expert Answer Center Search and browse more than 25,000 question and
answer pairs from more than 250 TechTarget industry experts.
TechTarget provides technology professionals with the information they need to perform their jobs - from developing strategy, to making cost-effective purchase decisions and managing their organizations' technology projects - with its network of technology-specific websites, events and online magazines.
