Pulling on the first line with a value of repetition

Hello
We use the Oracle 11.1.

We have a table of postal codes.

We have several lines for each zip code because we have different areas that use the same zip code.

We want to reduce the lines of a line by zip code. But they said use they want to keep the fields that differ (neighborhood of the exodus).

Then they said "Just take the first value of each."

This code reduces the postcodes of a line by postal code, but as you can see I replaced the field with the name of the field values.

SELECT distinct  ZIPCODE, CITY, STATE, COUNTY, AREACODE, 'CITYTYPE', CITYALIASABBREVIATION, 'CITYALIASNAME', LATITUDE, LONGITUDE, TIMEZONE, ELEVATION, COUNTYFIPS, DAYLIGHTSAVING, PREFERREDLASTLINEKEY, CLASSIFICATIONCODE,
           MULTICOUNTY, STATEFIPS, 'CITYSTATEKEY', 'CITYALIASCODE', 'PRIMARYRECORD', CITYMIXEDCASE, 'CITYALIASMIXEDCASE', STATEANSI, COUNTYANSI
    FROM   zip_code
GROUP BY   ZIPCODE, CITY, STATE, COUNTY, AREACODE, CITYTYPE, CITYALIASABBREVIATION, LATITUDE, LONGITUDE, TIMEZONE, ELEVATION, COUNTYFIPS, DAYLIGHTSAVING, PREFERREDLASTLINEKEY, CLASSIFICATIONCODE, MULTICOUNTY, STATEFIPS,
           CITYALIASCODE, PRIMARYRECORD, CITYMIXEDCASE, STATEANSI, COUNTYANSI
order by zipcode;

How should I take either one record per postal code with the first value in these fields or

How should I take the first record for each zip code?

either way works for me.

Thank you

Hello

This is called a Query Top - N , and this is a way to do it:

WITH     got_r_num     AS
(
     SELECT     z.*
     ,     ROW_NUMBER () OVER ( PARTITION BY  zipcode
                               ORDER BY          city
                         ,                ...   -- add tie-breakers here
                       )      AS r_num
     FROM    zip_code
)
SELECT     *     -- or list all columns except r_num
FROM     got_r_num
WHERE     r_num     = 1
;

You can simply use MIN or MAX on the columns, as the line with the name of the minimum city do not lowest have area code or the longitude. The above method preserves the first line of each zip code intact, where the 'first': the first in order of aphabetic by the name of the city. If it is not unique, then you may want breakage to the analytical ORDER BY clause.

If you are deleting rows, you can use this in a NOT IN subquery. If you copy lines to a new table, you can use the query above in an INSERT statement.

Published by: Frank Kulash, March 18, 2011 12:40

I just see Polywog response:

Pollywog wrote:
You can use the rank or rownumber function...

If I understand the problem, you don't want to use RANK in this particular case. When there is equality, GRADE will assign 1 to all the contenders. I think the whole point of this thread is that you exactly want a #1 in each zip code, which is what ROW_NUMBER, but not RANK, guarantees.

Tags: Database

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Return the first line with a non-null value in a column
Hey there, gurus. Can someone give me a hand with this?

I have a table with six columns: Class_ID, Course_ID, start_date, Last_Name, First_Name, company. When our students take a class and will fill in an evaluation form, they fill in the Class_ID Last_Name First_Name, and Company. The Course_ID and Start_Date are filled automatically based on the Class_ID.

I am trying to generate a report that contains Class_ID, Course_ID and Start_Date, PLUS the value of the first not null in the column of company for a combination given to the three first columns. Here is my SQL that does not quite do the trick:

Select distinct c.class_id, c.course_id, c.start_date, p.company
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At present, if in a given class, a student entered "CCCC" under the name of the company and another entry "Collin Co Comm Coll" and another between "Collin College", I would get three rows of this class when you use the SQL above. I want just one line. I don't really like which company names gets selected - one of them will be great for our needs. I just need to see a line for each class_id and single value that some students entered the area of the company. And I guess I have to say that if no student fills in the name of the company I need to see the value null, because I need to see the line no matter what.

Looks like some sort of funky outer join or a coalesce, but it is beyond my ability to understand.

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```
select c.class_id, c.course_id, c.start_date, max(p.company) company
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and s.pid = p.pid
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Mr President, how can I enter two rows at the same time with different default values that only the first line to use see?

Mr President.

My worm jdev is 12.2.1

How to enter two rows at the same time with different default values that only the first line to use see?

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Mr President

I change the code given by expensive Sameh Nassar and get my results.

Thanks once again dear Sameh Nassar .

My code to get my goal is

First line of code is

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And final saveUpdate method is

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Thanks for all the cooperation to obtain the desired results.

Concerning

Discover with function as datasource returns only the first line.

Hello

I created the following function to get the status of all the rules for the instances of SQL Server.

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When I tested the function, it returns all instances of SQL Server with two other columns.

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change your line of

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EXN_DATE         EXN_NO EXN_AC E    WITHDRAWAL       DEPOSIT
--------- ------------- ------ - ------------- -------------
01-MAR-09         2.000 AC0002 E      2000.000
10-MAR-09         7.000 AC0012 I                     500.000
15-MAR-09         5.000 AC0007 E        15.000
20-MAR-09         8.000 AC0012 I                     700.000
31-MAR-09         6.000 AC0008 E        30.000
01-APR-09         9.000 AC0013 I                     250.000
07-APR-09         1.000 AC0001 E       200.000
09-APR-09         4.000 AC0011 E        35.000
09-APR-09         3.000 AC0003 E        50.000
 
9 rows selected.

http://S640.Photobucket.com/albums/uu123/fairoozxp/?action=view & Current = EXPRPT.jpg
http://S640.Photobucket.com/albums/uu123/fairoozxp/?action=view & Current = EXPRPT1.jpg
http://S640.Photobucket.com/albums/uu123/fairoozxp/?action=view & Current = EXPRPT2.jpg

much appreciated, tyvm.

Hello

Is the problem that, when it is be a rank with exn_date =: m_frm_date, the line which represents the total front: m_frm_date sometimes appears after him?
If Yes, then you must add something to the ORDEER TO ensure that the total line comes first.
If NWT is NULL rfor only the total row, and then, as said to put, simply add 'NULLS FIRST' to "ORDER BY tno". Don't forget to do this as well in the analytical AGENDA BY:

OVER (ORDER BY op_date, tno NULLS FIRST)     AS bal

towards the beginning of your query and the result ORDER BY value at the end:

ORDER BY  op_date,
             tno          NULLS FIRST;

If reallly NWT can be null, you can create a new column (I'll call her sort_key) ust to distinguish the total line on the lines later. SELECT a literal 1 sort_key of ACE in the part of the UNION that created the total line, and then '2 AS sort_key' in the part of the UNION, who gets lines and after: m_frm_date:

SELECT     op_date, tno, op_code, ei, withdrawal, deposit,
     SUM ( NVL (deposit, 0)
         - NVL (withdrawal, 0)
         ) OVER (ORDER BY op_date, sort_key, tno)     AS bal
FROM
     (
     SELECT  TO_DATE (:m_frm_date, 'dd/mm/yyyy')        AS op_date,
          NULL                                  AS tno,
          NULL                            AS op_code,
          NULL                            AS ei,
          withdrawal,
          deposit,
          1                                        AS sort_key
     FROM
          (     -- Begin sub-query for expenses before :m_frm_date          SELECT  TO_DATE (:m_frm_date, 'dd/mm/yyyy')        AS op_date,
          SELECT     SUM (withdrawal)                        AS withdrawal,
               SUM (deposit)                          AS deposit
          FROM
               (
               SELECT     SUM (DECODE (expn_ei, 'E', exn_amount))     AS withdrawal,
                    SUM (DECODE (expn_ei, 'I', exn_amount)) AS deposit
               FROM     expenses_txn,
                    expense_master
               WHERE     exn_acnt_code     = expn_code
               AND     exn_date     < TO_DATE (:m_frm_date, 'dd/mm/yyyy')
               UNION ALL
               SELECT     NULL          AS withdrawal,
                    op_amount     AS deposit
               FROM     op_bal
               )
          )     -- End sub-query for expenses before :m_frm_date
     UNION ALL
     SELECT     exn_date,
          exn_no,
          exn_acnt_code,
          expn_ei,
          DECODE (expn_ei, 'E', exn_amount)     AS withdrawal,
          DECODE (expn_ei, 'I', exn_amount)     AS deposit,
          2                               AS sort_key
     FROM     expenses_txn,
          expense_master
     WHERE     exn_acnt_code     = expn_code
     AND     exn_date      BETWEEN  TO_DATE (:m_frm_date, 'dd/mm/yyyy')
                     AND       TO_DATE (:m_upto_date,'dd/mm/yyyy')
     )
ORDER BY  op_date,
             sort_key,
             tno;

Be sure to use strings to represent DATEs. If: m_frm_date is a string, it must always be used with TO_DATE and TO_CHAR ever.

Never, send or even write, unformatted code.
During the validation of code on this site, type the 6 characters
{code}
(small letters only, inside curly braces) before and after the code for formatting, to keep the spacing.

First character left in file by reading the first line in text file

When you use the function of reading text from a file file, I noticed that the 1st character is left in the file. I read the line correctly.

When adding a 2nd line this character is in the file.

Part vi code is attached.

Any ideas?

Thank you.

Elik

Can you attach a file of real data and tell us what you mean by "first character". The number of characters per line do you have?

Can you tell us what you see in the modified file and what you expect to see.

Everything seems good.
1. Read you the first line and so the file pointer is just after the first line
2. You set the size of the file at the end (seems unnecessary, because it does nothing). The file pointer is always right after the first line.
3. You write the first line you read concatenated with a second line. It will be written on the current file pointer, i.e. after the existing line
4. The first line is in the file twice, as planned.
Setting the file size to the 'end' on an existing file does not have something useful. If you want to set the position of the file instead?

Try to set the file position from and new data will be written at the beginning of the file.

Scan of a file only works on the first line

Hello

I'm new to Labview (see 8.6) and I'm running on this problem.

I use the Scan of a file to get a certain amount of information for the installation of test.txt. The data of the file looks like this:

AAA 1

BBB 2

REC 3

I noticed that the Scan of the file works for only the first line. Trying to get data that are not in the first line results in an error 85.

Any ideas? Thank you

It's all in what the scan of the file reads, and what is the next cgaracter in the file.

Your first analysis of the file reads up to but NOT including the first newline in the file.

The second read readings where the first reading was arrested and is expected to see 'B' as the next character, but sees the new line instead, and if the analysis fails. You must specify second reading formatted to await the return line.

You can do this by making the FIRST character of the format string space, that will tell it to expect a number any of charaters 'white space '.

Yo can indeed put a space at the beginning of the format string in your first analysis of the file and it will match with zero white space characters before you see the AAA. By doing this he also tolerate to see the spaces and tabs before your AAA or BBB identifiers.

Rod.

Pulling on the first line with a value of repetition

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