Hi all. My ultimate goal is to return two columns, where no single value appears anywhere twice. This means that not only do I want to check that nothing from column A appears in column B and vice-versa, but I also don't want the same value appearing twice in A and twice in B.
So far I have:
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--Diff the columns
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INSERT INTO @Table
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SELECT One, Two
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FROM @Column1 a
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FULL OUTER JOIN @Column2 b
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ON ((One NOT IN (Two)) OR (Two NOT IN (One)))
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But then my trouble is removing the redundant values in each column. I tried splitting the table into single-column tables so that they would no longer be linked together, and then deleting duplicate records out of that single-column table. But it didn't work.
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-- Attempt at removing duplicate values
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DELETE FROM @Column1
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DELETE FROM @Column2
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INSERT INTO @Column1 SELECT One FROM @Table
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INSERT INTO @Column2 SELECT Two FROM @Table
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INSERT INTO @Column3 SELECT DISTINCT One FROM @Column1
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ORDER BY One
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INSERT INTO @Column4 SELECT DISTINCT Two FROM @Column2
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ORDER BY Two
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But when I display these two columns together there are duplicates, and when I display them individually they aren't even in order. What's wrong here?
Thanks,
-C
