@SUBSTRING function - use with if

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• A question about the analytical function used with the GROUP BY clause in SHORT

  Hi all
  
  I created the following table named myenterprise
  

  CITY       STOREID    MONTH_NAME TOTAL_SALES            
  ---------- ---------- ---------- ---------------------- 
  paris      id1        January    1000                   
  paris      id1        March      7000                   
  paris      id1        April      2000                   
  paris      id2        November   2000                   
  paris      id3        January    5000                   
  london     id4        Janaury    3000                   
  london     id4        August     6000                   
  london     id5        September  500                    
  london     id5        November   1000

  If I want to find which is the total sales by city? I'll run the following query

  SELECT city, SUM(total_sales) AS TOTAL_SALES_PER_CITY
  FROM myenterprise
  GROUP BY city
  ORDER BY city, TOTAL_SALES_PER_CITY;

  that works very well and produces the expected result, i.e.

  CITY       TOTAL_SALES_PER_CITY   
  ---------- ---------------------- 
  london     10500                  
  paris      17000            

  Now in one of my books SQL (Mastering Oracle SQL) I found another method by using the SUM, but this time as an analytic function. Here's what the method of the book suggests as an alternative to the problem:

  SELECT city, 
         SUM(SUM(total_sales)) OVER (PARTITION BY city) AS TOTAL_SALES_PER_CITY
  FROM myenterprise
  GROUP BY city
  ORDER BY city, TOTAL_SALES_PER_CITY;

  I know that the analytic functions are executed after the GROUP BY clause has been transformed completely and Unlike regular aggregate functions, they return their result for each line belonging to the partitions specified in the partition clause (if there is a defined partition clause).
  
  Now my problem is that I do not understand what we have to use two functions SUM? If we only use one only, i.e.

  SELECT city, 
         SUM(total_sales) OVER (PARTITION BY city) AS TOTAL_SALES_PER_CITY
  FROM myenterprise
  GROUP BY city
  ORDER BY city, TOTAL_SALES_PER_CITY;

  This generates the following error:

  Error starting at line 2 in command:
  SELECT city, 
         SUM(total_sales) OVER (PARTITION BY city) AS TOTAL_SALES_PER_CITY
  FROM myenterprise
  GROUP BY city
  ORDER BY city, TOTAL_SALES_PER_CITY
  Error at Command Line:2 Column:11
  Error report:
  SQL Error: ORA-00979: not a GROUP BY expression
  00979. 00000 -  "not a GROUP BY expression"
  *Cause:    
  *Action:

  The error is generated for the line 2 column 11 which is, for the expression SUM (total_sales), well it's true that total_sales does not appear in the GROUP BY clause, but this should not be a problem, it has been used in an analytical function, so it is evaluated after the GROUP BY clause.
  
  So here's my question:
  
  Why use SUM (SUM (total_sales)) instead of SUM (total_sales)?
  
  
  Thanks in advance!
  :)
  
  
  
  
  
  In case you are interested, that's my definition of the table:

  DROP TABLE myenterprise;
  CREATE TABLE myenterprise(
  city VARCHAR2(10), 
  storeid VARCHAR2(10),
  month_name VARCHAR2(10),
  total_sales NUMBER);
  
  INSERT INTO myenterprise(city, storeid, month_name, total_sales)
    VALUES ('paris', 'id1', 'January', 1000);
  INSERT INTO myenterprise(city, storeid, month_name, total_sales)
    VALUES ('paris', 'id1', 'March', 7000);
  INSERT INTO myenterprise(city, storeid, month_name, total_sales)
    VALUES ('paris', 'id1', 'April', 2000);
  INSERT INTO myenterprise(city, storeid, month_name, total_sales)
    VALUES ('paris', 'id2', 'November', 2000);
  INSERT INTO myenterprise(city, storeid, month_name, total_sales)
    VALUES ('paris', 'id3', 'January', 5000);
  INSERT INTO myenterprise(city, storeid, month_name, total_sales)
    VALUES ('london', 'id4', 'Janaury', 3000);
  INSERT INTO myenterprise(city, storeid, month_name, total_sales)
    VALUES ('london', 'id4', 'August', 6000);
  INSERT INTO myenterprise(city, storeid, month_name, total_sales)
    VALUES ('london', 'id5', 'September', 500);
  INSERT INTO myenterprise(city, storeid, month_name, total_sales)
    VALUES ('london', 'id5', 'November', 1000);

  Edited by: dariyoosh on April 9, 2009 04:51

  It is clear that thet Analytics is reduntant here...
  You can even use AVG or any analytic function...

  SQL> SELECT city,
    2         avg(SUM(total_sales)) OVER (PARTITION BY city) AS TOTAL_SALES_PER_CITY
    3  FROM myenterprise
    4  GROUP BY city
    5  ORDER BY city, TOTAL_SALES_PER_CITY;
  
  CITY       TOTAL_SALES_PER_CITY
  ---------- --------------------
  london                    10500
  paris                     17000
  

• How to use the Substring function with Case statement.

  Hi all
  
  I have a requirement where I have to use the substring function on the ground for the report criteria.
  FOR EXAMPLE
  I branch domain name where I have all the information of the branch names, now some of the branch names are too large with an extension after the name.
  now I want substing it, but the length of characters varies for each branch.
  so is it possible where we use a box where we can define if the character of name plug exceed a value then he substing with this length.

  Try something like this:

  LENGTH WHEN CARTER (tablename. Branch_Name) > n THEN SUBSTRING (...) Of ANOTHER tablename. Branch_Name END

  where n is the number of characters that you want to start the break.

• WE SHOULD NOT USE SUBSTR FUNCTION...

  Hello

  ex: [email protected] , [email protected] [email protected]

  AS THIS HUNDRED PLATE IS HERE.

  QUERY:

  I DON'T WANT THAT YAHOO, GMAIL LIKE THAT... WE SHOULD NOT USE SUBSTR FUNCTION...

  THIS IS AN INTERVIEW QUESTION

  Thank you

  Try:

  Select regexp_replace (' [email protected]',' ^. * @(.*)-.) (. *)', '\1') twice;

• How do we use the SUBSTR function in OWB

  Hello, I'm pretty new to OWB. I need to use the SUBSTR function in owb. My source table has 16 characters in length. But in my datamar,.
  the length is 14 years. I want to the substring from source to the destination. The mappings are already developed. I need to change the mapping to make sure that,
  It brings only SUBSTR (1.14) mini - DW.
  
  Any help is appreciated.

  Use the operator of expression between two attributes.

  OWB has already SUBSTR as a preset transformation

  Take a look at the doc below
  26.3.1 open the expression builder

  http://docs.Oracle.com/CD/E11882_01/OWB.112/e10935.PDF

• NLSSORT function not used with CHAR and VARCHAR2 column index

  Hello!
  
  Create a test bench:

  CREATE TABLE scott.nls_demo
        (
        col_varchar            varchar2(4),
        col_char               char(4),
        col_varchar_NLS_GERMAN varchar2(4),
        col_char_NLS_GERMAN    char(4)
        );
   
  INSERT INTO scott.nls_demo (
        col_varchar,
        col_char,
        col_varchar_NLS_GERMAN,
        col_char_NLS_GERMAN  )
    SELECT 
           substr(object_name,1,4),
           substr(object_name,1,4),
           substr(object_name,1,4),
           substr(object_name,1,4)
    FROM all_objects where rownum<5000;
  
  COMMIT; 
  
  create index scott.i_varchar on scott.nls_demo (col_varchar);  
  create index scott.i_char    on scott.nls_demo (col_char);
  
  create index scott.i_varchar_NLS_GERMAN on scott.nls_demo ( NLSSORT(col_varchar_NLS_GERMAN,'nls_sort=''GERMAN_CI'''));  
  create index scott.i_char_NLS_GERMAN    on scott.nls_demo ( NLSSORT(col_char_NLS_GERMAN,   'nls_sort=''GERMAN_CI'''));
   

  Now "explain plan" these 8 select statements in SQL * more:
  

  variable c char(4);
  variable v varchar2(4);
  
  exec :c:= 'abc';
  exec :v:= 'abc';
  
  explain plan for SELECT /* 1*/ * FROM scott.nls_demo where col_varchar=:v;
  SELECT * FROM TABLE(dbms_xplan.display);
  
  explain plan for SELECT /* 2*/ * FROM scott.nls_demo where col_char=:c;
  SELECT * FROM TABLE(dbms_xplan.display);
  
  explain plan for SELECT /* 3*/ * FROM scott.nls_demo where col_varchar_NLS_GERMAN=:v;
  SELECT * FROM TABLE(dbms_xplan.display);
  
  explain plan for SELECT /* 4*/ * FROM scott.nls_demo where col_char_NLS_GERMAN=:c;
  SELECT * FROM TABLE(dbms_xplan.display);
  
  ALTER SESSION SET NLS_COMP = linguistic;
  ALTER SESSION SET NLS_SORT = german_ci;
  
  explain plan for SELECT /* 5*/ * FROM scott.nls_demo where col_varchar=:v;
  SELECT * FROM TABLE(dbms_xplan.display);
  
  explain plan for SELECT /* 6*/ * FROM scott.nls_demo where col_char=:c;
  SELECT * FROM TABLE(dbms_xplan.display);
  
  explain plan for SELECT /* 7*/ * FROM scott.nls_demo where col_varchar_NLS_GERMAN=:v;
  SELECT * FROM TABLE(dbms_xplan.display);
  
  explain plan for SELECT /* 8*/ * FROM scott.nls_demo where col_char_NLS_GERMAN=:c;
  SELECT * FROM TABLE(dbms_xplan.display);
   

  What I see on 11.2.0.2 is:
  
  1.) statement 1 would use the I_VARCHAR index, that is what I expected.
  2.) statement 2 would use the I_CHAR index, that is what I expected.
  3.) no clue used, because none are available right here for you. Understood.
  4.) no clue used, because none are available right here for you. Understood.
  
  And when define us NLS_SORT = german_ci:
  
  5.) no clue used, because none are available right here for you. Understood.
  6.) no clue used, because none are available right here for you. Understood.
  7.) I_VARCHAR_NLS_GERMAN we used. Large.
  8.) no index used, although I think that "i_char_NLS_GERMAN" would do the job...
  
  Why the index 'i_char_NLS_GERMAN' is not used with the 8 statement? Jonathan? Someone else?
  
  Thanks for your help!
  Marcus

  Not really a reason to not use TANK - although there are many of them.

  More than one reason to not always rely to "explain the plan for?

  All the variables passed in EXPLAINING the PLAN for are treated as VARCHAR2.
  In addition, there is no point setting the values of the variable because they will not cast a look either with MAP to EXPLAIN.

  SQL> CREATE TABLE nls_demo
    2        (
    3        col_varchar            varchar2(4),
    4        col_char               char(4),
    5        col_varchar_NLS_GERMAN varchar2(4),
    6        col_char_NLS_GERMAN    char(4)
    7        );
  
  Table created.
  
  SQL>
  SQL> INSERT INTO nls_demo (
    2        col_varchar,
    3        col_char,
    4        col_varchar_NLS_GERMAN,
    5        col_char_NLS_GERMAN  )
    6    SELECT
    7           substr(object_name,1,4),
    8           substr(object_name,1,4),
    9           substr(object_name,1,4),
   10           substr(object_name,1,4)
   11    FROM all_objects where rownum<5000;
  
  4999 rows created.
  
  SQL>
  SQL> commit; 
  
  Commit complete.
  
  SQL>
  SQL> create index i_varchar on nls_demo (col_varchar);  
  
  Index created.
  
  SQL> create index i_char    on nls_demo (col_char);
  
  Index created.
  
  SQL>
  SQL> create index i_varchar_NLS_GERMAN on nls_demo ( NLSSORT(col_varchar_NLS_GERMAN,'nls_sort=''GERM
  AN_CI'''));  
  
  Index created.
  
  SQL> create index i_char_NLS_GERMAN    on nls_demo ( NLSSORT(col_char_NLS_GERMAN,   'nls_sort=''GERM
  AN_CI'''));
  
  Index created.
  
  SQL>
  SQL> variable c char(4);
  SQL> variable v varchar2(4);
  SQL>
  SQL> exec :c:= 'abc';
  
  PL/SQL procedure successfully completed.
  
  SQL> exec :v:= 'abc';
  
  PL/SQL procedure successfully completed.
  
  SQL>
  SQL> ALTER SESSION SET NLS_COMP = linguistic;
  
  Session altered.
  
  SQL> ALTER SESSION SET NLS_SORT = german_ci;
  
  Session altered.
  
  SQL>
  SQL> SELECT /* 8*/ * FROM nls_demo where col_char_NLS_GERMAN=:c;
  
  no rows selected
  
  SQL> SELECT * FROM TABLE(dbms_xplan.display_cursor);
  
  PLAN_TABLE_OUTPUT
  ----------------------------------------------------------------------------------------------------
  SQL_ID  9su0j5vzuwzyj, child number 0
  -------------------------------------
  SELECT /* 8*/ * FROM nls_demo where col_char_NLS_GERMAN=:c
  
  Plan hash value: 2830339923
  
  -------------------------------------------------------------------------------------------------
  | Id  | Operation                   | Name              | Rows  | Bytes | Cost (%CPU)| Time     |
  -------------------------------------------------------------------------------------------------
  |   0 | SELECT STATEMENT            |                   |       |       |     3 (100)|          |
  |   1 |  TABLE ACCESS BY INDEX ROWID| NLS_DEMO          |    50 |  2150 |     3   (0)| 00:00:01 |
  |*  2 |   INDEX RANGE SCAN          | I_CHAR_NLS_GERMAN |    20 |       |     1   (0)| 00:00:01 |
  -------------------------------------------------------------------------------------------------
  
  Predicate Information (identified by operation id):
  ---------------------------------------------------
  
     2 - access("NLS_DEMO"."SYS_NC00006$"=NLSSORT(:C,'nls_sort=''GERMAN_CI'''))
  
  Note
  -----
     - dynamic sampling used for this statement (level=2)
  
  23 rows selected.
  
  SQL> 
  

  Published by: Dom Brooks on February 21, 2011 15:39

• Equivalent OBIEE TO_DATE and SUBSTR functions

  I have the formula for the next column, which works correctly:

  SUM (CASE WHEN (TimeStampDiff (SQL_TSI_month, "Registration - College". "" Effective colleges F. ((("' Program Start Date ', current_date)) / 12 < 6 THEN 1 ELSE 0 END)

  
  

  I want to replace the current_date with scope of practice. Because the scope of practice is currently not in a date format (e.g. 201213, 201314, 201415), I need to use the TO_DATE and SUBSTR functions OBIEE equivalent to convert this field into a format that can be used by the TimeStampDiff function.

  The current (outside OBIEE) SQL for the conversion of the year at a date looks like this:

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  I tried to replace current_date in the column formula above by the following, but it didn't work:

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• find substr until ',' use instr

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• To specify the SUBSTR function in SqlLdr

  Hello
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  Thank you
  Prabha

  Hi Prahba

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• What Mac Mini for use with Adobe CC?

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• Is it possible to pair a third-party GPS for use with Apple Watch?

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• Easy way to locate the function used on the diagram by name?

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• How to install the printer with the laptop. Printer was used with another computer.

  I wanted to use a printer with my laptop lexmark. The printer was used with another computer and it worked fine, but when I tried to use it with the laptop, I was not able find the installation disk and tried to install without it. The laptop produces a message indicating he could find the internet facility info if I accepted this. He had apparently fulfilled this function, and I tried to print a document. The document has been printed, but the result was so low, that it was not readable. I then found the installation disk and tried to restart but was confused by the messages and options. I don't have a printer that prints. Help.

  "Mr. jiggs" wrote in message News: * e-mail address is removed from the privacy * .com...

  I wanted to use a printer with my laptop lexmark. The printer was used with another computer and it worked fine, but when I tried to use it with the laptop, I was not able find the installation disk and tried to install without it. The laptop produces a message indicating he could find the internet facility info if I accepted this. He had apparently fulfilled this function, and I tried to print a document. The document has been printed, but the result was so low, that it was not readable. I then found the installation disk and tried to restart but was confused by the messages and options. I don't have a printer that prints. Help.

  Unplug the printer from the laptop.  In Vista or Win 7, click Orb (Start), settings, Control Panel, printers. When the Lexmark printer is found, right-click on it and then click on remove.
   
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• Function group with CLOB fields in the Select statement

  I try to query our following sql database. Remove the Clob (a.description) field I managed. But I need the Clob (a.description) field. Here is my sql class

  select  a.id_number, a.id_owner,  MAX (n.next_action_required)
              KEEP (DENSE_RANK LAST ORDER BY n.modified_date),
           MAX (n.modified_date) KEEP (DENSE_RANK LAST ORDER BY n.modified_date) 
  from table1 a, table2 n
  where a.id_number = n.id_number
  group by a.id_number, a.id_owner

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  select  a.id_number, a.id_owner,  MAX (n.next_action_required)
              KEEP (DENSE_RANK LAST ORDER BY n.modified_date),
           MAX (n.modified_date) KEEP (DENSE_RANK LAST ORDER BY n.modified_date) , DBMS_LOB.SUBSTR (a.description, 8001, 10000)
  from table1 a, table2 n
  where a.id_number = n.id_number
  group by a.id_number, a.id_owner, DBMS_LOB.SUBSTR (a.description, 8001, 10000)

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  Maybe

  select id_number,
         id_owner,
         description,
         next_action_required,
         modified_date
    from (select a.id_number,
                 a.id_owner,
                 a.description,
                 n.next_action_required,
                 n.modified_date
                 row_number() over (partition by a.id_number,a.id_owner
                                        order by n.modified_date desc,n.next_action_required desc) rn
            from table1 a,
                 table2 n
           where a.id_number = n.id_number
         )
   where rn = 1
  

  Concerning

  Etbin

• Can a DB function used between 2 pools of connections

  Hi all
  We have 2 pools of connections, 1 connected to Oracle DB Data Warehouse. The other connection pool is an Excel spreadsheet, which has projects and scheduling dates. We have modelled in MDB and her servant perfectly. Now, the question is, we have a function in Oracle DB, which works well when I use with any size of Oracle DB DW. But, when I use the same function using the dimension modeled of excel sheet it generates an error. Here, dimension sheet Excel is modeled to inculde model DW.
  
  Error: "A general error has occurred. [nQSError: 42015] Cannot function ship the following expression. »
  
  So my question is "is there no work around to use the same function when using the other connection pool size.
  
  Pointers for this problem is highly appreciated.
  
  Thank you
  Vijay

  Hi Vijay,

  I agree 100% with what Dave. The function you have in Oracle should have access to the values passed in. OBIEE has access to both DIM_DW and DIM_EXCEL, but the Oracle function has no access to DIM_EXCEL. Just to give you a high level understanding of what is happen, here's what OBIEE made to combine the two sets of data in a single report:

  Assume that your report is like so: DIM_DW. COLUMN1, DIM_EXCEL. COLUMN2, FACT_DW. MEASURE1

  To get the data OBIEE sends two separate applications: one against the DW that retrieves DIM_DW. Column1 and FACT_DW. MEASURE1 and another for DIM_EXCEL. COLUMN2.

  Once the two request to return, the OBIEE server joined data sets and then presents them in a report.

  Now, when you call your function (DIM_DW. COLUMN1, DIM_EXCEL. COLUMN2), OBIEE sends the request to just the Oracle DB. But the Oracle DB can not see the Excel data, then it fails because the DIM_EXCEL argument. Column2 is not defined to Oracle DB.

  Here are two methods you could use to make it work:
  (1) configure the Excel file as an external table in the Oracle DB. Then, the function would be aware of the values of column in Excel.
  (2) port the function to the MDB using layer logic the formula Expression. According to what is your function, it is not possible.

  Whatever it is, how you install now, you can't reach your goal. The reason why I recommended that you separate your connection pool Excel in a different database object is because the way you have it setup right now makes it appear like the Oracle DB would be aware of the Excel tables. But that's not true. Keeping them separated to avoid any future confusion.

  Good luck!

  -Joe