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Getting the first row of columns with same values

1
If have sql output like :
10 1
10 2
20 1
20 2
30 1
30 2
30 3

I want to get the output as

10 1
20 1
30 1

How can i do it ?
Jan 30 '07 #1
1 3582
SELECT * FROM (
SELECT
RANK() OVER (
PARTITION BY
COLUMN_1
ORDER BY
COLUMN_2
) rank_,
t.*
FROM YOUR_TABLE t
)
WHERE rank_ = 1;
Feb 6 '07 #2

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