Solution probably really Simple (where in the Update statement)

Right,

I have a table. In this table, there are 5 fields for the sake of arguments:

COLUMN_ONE COLUMN_THREE COLUMN_FOUR COLUMN_FIVE COLUMN_TWO

On this table there will be duplicate records, but only the column 1, column 2 and 3 on these "duplicate" files will be the same, column 4 will be different (column 4 is not a unique identifier, but if there are duplicate records, it will be different at least 2 records). Column 5 is not yet filled, all null.

I need a way to update column 5 of these duplicate records. However, let me update on one of the folders and the criteria for this will be where column_4 = "Hello".

So far I came with an update statement similar to the following, but I don't know where with her:

UPDATE DANS_TABLE
SET COLUMN_five = "DUPLICATE".
WHERE EXISTS (SELECT column_one | column_two | column_three, COUNT (*))
OF DANS_TABLE
GROUP BY column_one | column_two | column_three
SEEN (COUNT (*) > 1)) and column_four = 'Hello ';

For any help, thank you very much! Much appreciated,

Dan

This is the query that updates that one line duplicated to column_five. I hope this helps...

UPDATE DANS_TABLE x 1
SET COLUMN_five = "DUPLICATE".
WHERE THERE ARE
(
Select r_id of
(select max (rowid) r_id, column_one | column_two | column_three)
of DANS_TABLE t1 where exists
(
Select str of
(
SELECT column_one | column_two | column_three str, COUNT (*)
OF DANS_TABLE
GROUP BY column_one | column_two | column_three
SEEN (COUNT (*) > 1)
) t2 where t2.str = t1.column_one | T1.column_two | T1.column_three
) column_one group | column_two | column_three
) x 2 where x 1 .rowid = 2 .r_id x
) and column_four = 'Hello ';

Tags: Database

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