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Posted on 2013-11-19
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Last Modified: 2014-03-20
I have a table named "InspectionsInfo" in this table there are two Fields:
"Inspection Number" and " Inspection Type Code"

I like to have a script that I can run to update the Inspection number is the following criteria is found:

If the "Inspection Number" and "Inspection Type Code" are the same  then update any subsquent records where these two fields are the same by adding an "A","B","C",etc, to the end of the "Inspection Number" see example below.

Can someone please assist me with this script???


                      CURRENT DATA                                       AFTER UPDATE
Inspection Number  Inspection Type Code              Inspection Number
1998-00000130               PL05                                     1998-00000130
1998-00000130               PL01                                             1998-00000130
1998-00000130               PL01                                            1998-00000130A
1998-00000130               PL04                                            1998-00000130
1998-00000130               PL04                                            1998-00000130A
1998-00000130               PL04                                            1998-00000130B
1998-00000130               PL04                                            1998-00000130C
1998-00000130               PL04                                            1998-00000130D
1998-00000130               BD03                                          1998-00000130
1998-00000130               BD03                                          1998-00000130A
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Question by:TonyEF
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6 Comments
 
LVL 34

Expert Comment

by:Brian Crowe
ID: 39660829
The first thing you need to do is define "subsequent".  What orders the records?
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LVL 34

Accepted Solution

by:
Brian Crowe earned 500 total points
ID: 39660838
try this...if the output reflects what you're looking for it's a simple matter to convert to an update.

WITH cteInfo (Number, TypeCode, RowNumber)
AS
(
      SELECT [Inspection Number],
            [Inspection Type Code],
            ROW_NUMBER() OVER(PARTITION BY [Inspection Number], [Inspection Type Code] ORDER BY [Inspection Number]) AS RowNumber
      FROM InspectionsInfo
)
SELECT Number, TypeCode,
      CASE WHEN RowNumber = 1 THEN Number ELSE Number + CHAR(RownUmber + 63) END
FROM cteInfo
0
 
LVL 50

Expert Comment

by:Lowfatspread
ID: 39663208
why don't you add a sequence number column instead?
where  does the inspection number come from in the first place ? (is the column a foreign key to another table?)
why do you have duplicates?
what distingusihes the rows in the first place...?
what is the correct order for the rows...?
what happens when you run out of letters ...? (A..Z or miss out vowels , or O, Q, I..)
       (you have more than 23... 26 duplicates)
0
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Author Comment

by:TonyEF
ID: 39663382
BriCrowe

It is what I need but noticed that some of the records have more than 26 duplicates, in this case once it reaches the letter Z start with AA and then AB and so on, otherwise it is exactly what I need and if you can help me make that change as well Creating a new field with the new Inspection Number I would greatly appreciate it..
0
 

Author Comment

by:TonyEF
ID: 39663396
Lowfatsprea

The data is stored like this from a very old database, the reason I need this done is because the new system that I am converting the data too does not except duplicates. The new system considers duplicates where the Inspection Number and the Inspection Type Code are the same. These records are not actually duplicates it is just the way the data is being stored by this old system.
 Once after the Z it needs to start with AA, AB, AC and so on....
0
 
LVL 34

Expert Comment

by:Brian Crowe
ID: 39666201
try this...

WITH cteInfo (Number, TypeCode, RowNumber)
AS
(
      SELECT [Inspection Number],
            [Inspection Type Code],
            ROW_NUMBER() OVER(PARTITION BY [Inspection Number], [Inspection Type Code] ORDER BY [Inspection Number]) AS RowNumber
      FROM InspectionsInfo
)
SELECT Number, TypeCode,
      Number + CASE WHEN RowNumber / 26 > 0 THEN CHAR(((RowNumber) / 26) + 64) ELSE '' END
            + CASE WHEN RowNumber > 1 THEN CHAR(CASE (RowNumber - 1) % 26 WHEN 0 THEN 26 ELSE (RowNumber - 1) % 26 END + 64) ELSE '' END
FROM cteInfo
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