Actually, you'd wanna select only the duplicate ones, since you don't want to deal with the ones that are fine already, right?
SELECT
DISTINCT *
FROM
TABLE_A as A,
TABLE_B as B
WHERE
A.ID = B.ID and
A.SECONDCOLUMN != B.SECONDCOLUMN
of course, doing a ..
SELECT
COUNT(*)
FROM
(
SELECT ID, COUNT(*) AS CNT FROM TABLE_A GROUP BY ID
) as COUNTS
WHERE
CNT = 1
will get you an idea of how many truely unique records there are.
++
jeffa
Play that funky music white boy..
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