Why the MAX aggregate function is used in SQL upon accession of the fields created in the designer?

Similar Questions

• Why I can't use the nested aggregate function?

  Hello Experts,

  Why I can't use the nested aggregate function? There is not an ora-00979 group by error of expression.

  Oracle Database 11 g Release 11.2.0.4.0 - 64 bit Production

  Select

     SUM (BOX WHEN (KSD_CREATEDATE BETWEEN TRUNC((KSD_CREATEDATE)) AND TRUNC(MIN(KSD_CREATEDATE)) +60) THEN 1  ELSE 0 END) AS col

  DE TABLE_3_4

  GROUP BY STC_FIRMANO

  Thank you

  GROUP BY will manage the SUM function, but the MIN is used incorrectly - use another SELECTION to get it, or work with only with a single line. Otherwise, you could do WITH... get the SUM of SELECT MIN...

• SQL statement by using the min aggregate function result extract a line - how?

  Need help, try to do something seemingly simple. I'll give a simple example to illustrate the problem.
  
  I'll use a simple table of addresses with 4 fields.
  
  Create the table:

    CREATE TABLE "ADDRESSES" 
     (     "OWNER_NAME" VARCHAR2(20 BYTE), 
       "STREET_NAME" VARCHAR2(20 BYTE), 
       "STREET_NUMBER" NUMBER
     ) ;

  complete with 6 rows

  Insert into ADDRESSES (OWNER_NAME,STREET_NAME,STREET_NUMBER) values ('FRED','MAIN',1);
  Insert into ADDRESSES (OWNER_NAME,STREET_NAME,STREET_NUMBER) values ('JOAN','MAIN',2);
  Insert into ADDRESSES (OWNER_NAME,STREET_NAME,STREET_NUMBER) values ('JEAN','MAIN',3);
  Insert into ADDRESSES (OWNER_NAME,STREET_NAME,STREET_NUMBER) values ('JACK','ELM',1);
  Insert into ADDRESSES (OWNER_NAME,STREET_NAME,STREET_NUMBER) values ('JANE','ELM',2);
  Insert into ADDRESSES (OWNER_NAME,STREET_NAME,STREET_NUMBER) values ('JEFF','ELM',3);

  We now have this:
  Select * from addresses

  OWNER_NAME           STREET_NAME          STREET_NUMBER          
  -------------------- -------------------- ---------------------- 
  FRED                 MAIN                 1                      
  JOAN                 MAIN                 2                      
  JEAN                 MAIN                 3                      
  JACK                 ELM                  1                      
  JANE                 ELM                  2                      
  JEFF                 ELM                  3                      
  
  6 rows selected

  Now, I want to group by street name and obtain a number of houses. At the same time, I would like to know the number of the first and the last House

      select
      street_name,
      count(*) "NBR HOUSES",
      min(street_number) "First Number",
      max(street_number) "Last Number"
       from addresses
      group by street_name
  
  produces
  
  STREET_NAME          NBR HOUSES             First Number           Last Number            
  -------------------- ---------------------- ---------------------- ---------------------- 
  ELM                  3                      1                      3                      
  MAIN                 3                      1                      3                      
  
  2 rows selected

  Excellent. Now for the problem. I would also like to list on each line, the owner who lives at number House first and/or the last. It should be noted, assume that the name of the street and the number is unique
  
  It seems I have everything that I need. Don't know how to get home.
  
  I tried:

  select
      street_name,
      count(*) "NBR HOUSES",
      min(street_number) "First Number",
      max(street_number) "Last Number",
      (Select b.owner_name from addresses b where b.street_number = min(street_number) and b.owner_name = owner_name) "First Owner"
       from addresses
      group by street_name

  But getting a syntax error sql group function unauthorized when I add the subselect statement.
  
  any ideas?
  
  Thanks for any help.
  
  Published by: user6876601 on November 19, 2009 19:08
  
  Published by: user6876601 on November 19, 2009 19:30

  Hello

  Welcome to the forum!

  Get the minimum and maximum number for each street is a pretty simple concept; simpler to describe and simple to code.
  Now you want to the owner_name associate the maximum and minimum, which is a concept more complex; a little more difficult to describe and, unfortunately, much less simple to code and much, much more difficult to explain:

  select
      street_name,
      count (*)                "NBR HOUSES",
      min (street_number)      "First Number",
      min (owner_name) KEEP (DENSE_RANK FIRST ORDER BY street_number)
                      "First Owner",
      max (street_number)      "Last Number",
      min (owner_name) KEEP (DENSE_RANK LAST ORDER BY street_number)
                      "Last Owner"
       from addresses
      group by street_name
  ;
  

  You will notice that I used min for "Original owner" and "last owner". Why is this?
  The key word in these functions is the FIRST or the LAST word that comes after DENSE_RANK and before ORDER BY. The function at the beginning is simply a break.

  In other words, MIN in this context refers only to what needs to happen when there is a link to the first or last in the group. Even if such a thing is impossibe in your data, generic functions must have a mechanism to return a single owner_name when two or more rows have an equal right to having the highest street_number. For example, if we change the address of Joan in 1 hand, then MIN (street_number) is always 1, of course, but who is the person associated with the minimum street_number: Fred or Joan? Both have an equal claim that he owns with the smallest address on Main Street, but aggregate functions must return a single value, so we must have a mechanism to indicate to the system, whether to return 'JOAN' or 'FRED '. In this example, I arbitrarily in the network said een of tie, the lowest name, in alphabetical order, must be returned. In this case, 'FRED' would return, "FRED" prior to "JOAN".

  Thank you for including CREATE TABLE and INSERT!

• Can you explain why the "analytical" Word is used in Sql

  I found to define the "analytic function" phrase is such: "a piece of syntax that is originating excessive."
  I don't understand why's called it "Analytics". In English 'analytical' comes from the word "to analyse" which means the examination of something. So it looks like "analytic function" should review/analyze something? but all the functions examaine/analyze something. If I group by article in my request, then all aggregate functions will conduct the review of the data, then why I call them better too 'analytic (al). Can you explain why the "analytical" Word is used in Sql world?

  CharlesRoos wrote:
  I found to define the "analytic function" phrase is such: "a piece of syntax that is originating excessive."
  I don't understand why's called it "Analytics". In English 'analytical' comes from the word "to analyse" which means the examination of something. So it looks like "analytic function" should review/analyze something? but all the functions examaine/analyze something. If I group by article in my request, then all aggregate functions will conduct the review of the data, then why I call them better too 'analytic (al). Can you explain why the "analytical" Word is used in Sql world?

  Aggregate functions will bring together data that is to sum or count etc once it is grouped together. It is not just review, but grouping.
  Analytical functions review / analyze the other rows of data, without having to group them in the result that they can summarize a set of values of a particular group (partition) of the data, or they can simply retrieve values of other lines (for example lead, lag, the first_value, last_value etc. functions.) They are able to look through the data without any aggregation of it. So why they are analytical.

• What is the function is used to read the form of angular Position a task?

  I created a task DAQmx in MAX. This task configures a counter on a PCI-6259 to counties of A and B of a coder with the angular Position. Which function to use to read the value since I am more counties of reading I read the position?

  Thank you in advance for any advice!

  Hi Izzy,

  I created the task UP. The task takes in the counter of an encoder input and converts it to angular position. Always use the DAQmxReadCounterF64 function to read the meter? I'm guessing that I made and that the function returns the angular position, rather than the raw numbers. Not sure if.

  Thank you for taking the time to answer.

  Regards-

  John o ' c

• Why the function of integrated separator string is missing in Oracle?

  Hi all

  It's maybe a generic/discussion question. And it's purely for learning about how Oracle prioritizes its development on the functions in construction.

  Well, we have very userful built-in functions (http://docs.oracle.com/cd/B19306_01/server.102/b14200/functions001.htm) is transformed during the versions of Oracle from simple to very complex (syntactic xml and data mining functions)

  But why is this important function to split a string has been neglected (may not be the right word) by Oracle.

  Be a learner curious and admirer of such a wonderful technology database called Oracle, I always thought that it must have a dedicated channel, divide the function.

  My question is: is this something that can be generalized in a built-in function?

  or

  Is he coming releases?

  At least a simple function first (I guessed right his name would be splitstr and the very basic features to do our job of splitting, maybe I'm wrong in thinking this way, please correct me if...) Thank you in advance!)

  splitstr('A,B,c',',','col')-> (separator ',' and the fractionating column mode)

  Output: A B C (three separate columns)

  splitstr('A,B,c',',','row')-> (separator ',' and the mode line split)

  Output:

  A

  B

  C

  ----------

  If oracle has this, there will be a lot of code reduced and we can be saved by connect or recursive with clause or as a matter of fact even xmltable (with or without tokenizer ) for the separation of the channels.

  What you have to say about this? You can ignore this naïve question if is not a value you answer.

  And thanks for everyone who reads this discussion!

  See you soon,.

  Manik.

  Can you please help me understand why Oracle has its participation in develping and DBMS_UTILITY.COMMA_TO_TABLE now then?

  http://docs.Oracle.com/CD/B19306_01/AppDev.102/b14258/d_util.htm

  Oracle can only tell you why they have developed this particular function. But the fact that Oracle included in a package of "utility" tells me that they do not consider that there was a generic number of use cases. These functions often begin as internal functions that Oracle decides to publish.

  But if you read this API spec you'll see that he does that to a VERY PARTICULAR use case and has several restrictions.

  The list must be a list separated by commas of non-vide: another thing that a comma-separated list is rejected. Do not count the commas inside double quotes.

  Entries in the list separated by commas may not include multibyte and dashes (-) character.

  Also, returns a collection which would normally be used only for a very limited number of items.

  It is not yet near a general-purpose function.

  A major complication with such a function in SQL is sql is generally used with more than one, or even millions, of lines.

  How you specify to Oracle where to put the collection on each of these lines?

  New - Oracle is a relational database. With the help of sql to manipulate collections is NOT a relational paradigm.

  Just my opinion. Others can and will disagree. But you may have to wait for the weekend for these answers.

• Using java user-defined aggregate function

  Hello
  
  I'm trying to implement a with Java user-defined aggregate function.
  
  Here's the Code Javaclass:
  
  Import Java.util;
  Oracle.sql import. *;
  import java.sql. *;
  import Java.Math.BigDecimal;
  Oracle import. CartridgeServices.*;
  
  stored the context type
  
  public class StoredCtx_SecMax
  {
  private BigDecimal b_max;
  private BigDecimal b_secmax;
  
  public StoredCtx_SecMax()
  {
  b_max = new BigDecimal (0);
  b_secmax = new BigDecimal (0);
  }
  
  public void SchreibeMax (entry BigDecimal)
  {
  b_max = entry;
  }
  
  public void SchreibeSecMax (entry BigDecimal)
  {
  b_secmax = entry;
  }
  
  public BigDecimal LeseMax()
  {
  Return b_max;
  }
  
  public BigDecimal LeseSecMax()
  {
  Return b_secmax;
  }
  }
  
  implementation type
  
  / public class SecondMax_j implements SQLData
  {
  BigDecimal private key;
  
  Ultimate SUCCESS of static BigDecimal = new BigDecimal (0);
  Final static BigDecimal ERROR = new BigDecimal (1);
  
  
  Implement the SQLData interface.
  
  String sql_type;
  public String getSQLTypeName() throws SQLException
  {
  Return sql_type;
  }
  
  ' Public Sub readSQL (SQLInput stream, string typeName) throws SQLException
  {
  sql_type = typeName;
  key = stream.readBigDecimal ();
  }
  
  Public Sub writeSQL (SQLOutput stream) throws SQLException
  {
  stream.writeBigDecimal (key);
  }
  
  
  methods of the type that implements ODCITable interface
  
  public static BigDecimal ODCIAggregateInitialize (oracle.sql.STRUCT [] sctx)
  throws SQLException
  {
  Connection Conn = DriverManager.getConnection("jdbc:default:connection:");
  
  create a stored environment and store the result set in it
  StoredCtx_SecMax ctx = new StoredCtx_SecMax();
  
  context of registry stored with cartridge services
  Touch int;
  try {}
  key = ContextManager.setContext (ctx);
  } catch {} (EC CountException)
  error return;
  }
  
  Create an instance of StockPivotImpl and store the key of
  Object [] impAttr = new Object [1];
  impAttr [0] = new BigDecimal (key);
  StructDescriptor sd = new StructDescriptor ("SECONDMAX_J", conn);
  SCTX [0] = new STRUCT(sd,conn,impAttr);
  
  return a SUCCESS;
  }
  
  public BigDecimal ODCIAggregateIterate (BigDecimal input)
  throws SQLException
  {
  retrieve the context stored with the key
  CTX StoredCtx_SecMax;
  try {}
  CTX = (StoredCtx_SecMax) ContextManager.GetContext (Key.intValue ());
  } catch (InvalidKeyException ik) {}
  error return;
  }
  
  BigDecimal b_max;
  BigDecimal b_secmax;
  
  b_max = ctx. LeseMax();
  b_secmax = ctx. LeseSecMax();
  
  If (eingabe.compareTo (b_max) == 1)
  {
  CTX. SchreibeSecMax (b_max);
  CTX. SchreibeMax (input);
  }
  on the other
  {
  If (eingabe.compareTo (b_secmax) == 1)
  {
  CTX. SchreibeSecMax (input);
  }
  }
  
  return a SUCCESS;
  }
  
  public BigDecimal ODCIAggregateTerminate (double [] returnValue, int flags) throws SQLException {}
  
  retrieve the context stored with the key
  CTX StoredCtx_SecMax;
  try {}
  CTX = (StoredCtx_SecMax) ContextManager.clearContext (Key.intValue ());
  } catch (InvalidKeyException ik) {}
  error return;
  }
  
  returnValue [0] = ctx. LeseSecMax () .doubleValue ();
  
  CTX = null;
  
  return a SUCCESS;
  }
  
  
  public BigDecimal ODCIAggregateMerge (oracle.sql.STRUCT ctx2) throws SQLException {}
  
  
  return a SUCCESS;
  }
  }
  
  
  To implement this in the database, I use the following script:
  
  CREATE OR REPLACE TYPE IMPROG. SECONDMAX_J as object
  
  (
  INTEGER key,
  
  public static function ODCIAggregateInitialize (sctx IN OUT SECONDMAX_J)
  
  Return number
  IN THE JAVA LANGUAGE
  NAME "Java.Math.BigDecimal return from SecondMax_j.ODCIAggregateInitialize (oracle.sql.STRUCT []).
  ,
  
  
  
  Member ODCIAggregateIterate (self IN OUT SECONDMAX_J function,
  
  Number return value)
  IN THE JAVA LANGUAGE
  NAME "Java.Math.BigDecimal SecondMax_j.ODCIAggregateIterate return (Java.Math.BigDecimal).
  ,
  
  
  
  Member ODCIAggregateTerminate (self IN SECONDMAX_J function,
  
  Return returnValue NUMBER, flags in number number)
  IN THE JAVA LANGUAGE
  NAME "Java.Math.BigDecimal return of SecondMax_j.ODCIAggregateTerminate (double [], int).
  ,
  
  
  
  Member ODCIAggregateMerge (self IN OUT SECONDMAX_J function,
  
  CTX2 IN SECONDMAX_J) return number
  IN THE JAVA LANGUAGE
  NAME "Java.Math.BigDecimal SecondMax_j.ODCIAggregateMerge return (oracle.sql.STRUCT)".
  );
  /
  
  CREATE OR REPLACE FUNCTION F_SECONDMAX_J (NUMBER value) RETURN NUMBER
  
  PARALLEL_ENABLE
  
  AGGREGATION to the HELP of SecondMax_j;
  /
  
  
  
  When I now use the F_SECONDMAX_J function.
  
  "(Columnname) select F_SECONDMAX_J from Tablename t;
  
  It works perfectly and shows me the right result.
  
  Then I tried to implement the fusion part as follows:
  
  public BigDecimal ODCIAggregateMerge (oracle.sql.STRUCT ctx2) throws SQLException {}
  
  BigDecimal Key2 = null;
  
  BigDecimal ctx_max = null;
  BigDecimal ctx_secmax = null;
  
  BigDecimal ctx2_max = null;
  BigDecimal ctx2_secmax = null;
  
  retrieve the context stored with the key
  StoredCtx_SecMax ctx = null;
  try {}
  CTX = (StoredCtx_SecMax) ContextManager.GetContext (Key.intValue ());
  } catch (Exception e) {}
  
  }
  
  Object [] impAttr = ctx2.getAttributes ();
  
  Key2 = (BigDecimal) impAttr [0];
  
  retrieve the second context stored using the key2
  StoredCtx_SecMax ctx_sec = null;
  try {}
  ctx_sec = (StoredCtx_SecMax) ContextManager.GetContext (key2.intValue ());
  } catch (Exception e) {}
  
  }
  
  ctx_max = ctx. LeseMax();
  ctx_secmax = ctx. LeseSecMax();
  
  ctx2_max = ctx_sec. LeseMax();
  ctx2_secmax = ctx_sec. LeseSecMax();
  
  If (ctx2_max.compareTo (ctx_max) == 1)
  {
  If (ctx2_secmax.compareTo (ctx_secmax) == 1)
  {
  CTX. SchreibeSecMax (ctx2_secmax);
  }
  on the other
  {
  CTX. SchreibeSecMax (ctx_max);
  }
  CTX. SchreibeMax (ctx2_max);
  }
  on the other
  {
  If (ctx2_max.compareTo (ctx_secmax) == 1)
  {
  CTX. SchreibeSecMax (ctx2_max);
  }
  }
  
  return a SUCCESS;
  }
  
  When I now try the function
  
  "Select / * + parallel (t 4) * / F_SECONDMAX_J (Columnname) of Tablename t;
  
  I always get a pointer NULL-error because the variable key2 is always 0 and therefore the functions LeseMax() and LeseSecMax()
  in the second context 'ctx_sec' produce this error NULL pointer.
  
  To me it seems that each parallel process is the construction of an additional class for himself, which is not available are my main process.
  
  My question is now how it is possible to access the context of stored of the parallel process, so that I can combine the results.
  
  Thank you very much
  
  Josef

  Hi Josef,

  just guess that I've never implemented with java user-defined aggregate functions or support parallel execution:

  Maybe you have to implement ODCIAggregateWrapContext?

  + Application of ODCIAggregateWrapContext is optional. It should be implemented only when the external memory is used to hold the aggregative, context and the user-defined aggregate is evaluated in parallel (which is, stated as PARALLEL_ENABLE). If the user-defined aggregate is not evaluated in parallel, ODCIAggregateWrapContext is not necessary. +
  [http://docs.oracle.com/cd/B12037_01/appdev.101/b10800/dciaggfns.htm#i1004974]

  Report it to progress and success.

  Good luck
  Rainer Stenzel

• Bug with the aggregate function and no group

  When I run the following query:

  with the_table as
  (
    select 1 as id, 100 as cost from dual
    union all select 2 as id, 200 as cost from dual
    union all select 3 as id, 300 as cost from dual
    union all select 4 as id, 400 as cost from dual
    union all select 5 as id, 500 as cost from dual
  )
  select id, cost
  from
  (
    select id, cost
    from the_table
    --
    union all
    --
    select 0 as id, sum(cost) as cost
    from the_table
    where 0 = 1
    -- group by 1
  )
  order by id;

  I get this result:

  ID    COST
  --  ------
   0  <null>     
   1     100
   2     200
   3     300
   4     400
   5     500

  However, when I "uncomment" the line "Group 1", the query works as expected (without the id = rank 0).
  
  This occurs even when "the_table" is an array.
  
  Someone else comes through this (and if so, how long is a problem)?
  
  The database is 11.2.0.2.0 64-bit.
  
  EDIT: It also happens without a Union - the following returns a single line (with null 0 and cost of id) without the Group By and no line with her:

  select id, cost
  from
  (
    select 0 as id, sum(cost) as cost
    from 
    (
      select 1 as id, 100 as cost from dual
      union all select 2 as id, 200 as cost from dual
      union all select 3 as id, 300 as cost from dual
      union all select 4 as id, 400 as cost from dual
      union all select 5 as id, 500 as cost from dual
    )
    where 0 = 1
    -- group by 1
  )
  order by id

  Edited by: Donbot February 15, 2012 10:29

  Donbot wrote:
  Someone else comes through this (and if so, how long is a problem)?

  The database is 11.2.0.2.0 64-bit.

  This is a documented behavior.

  http://docs.Oracle.com/CD/E11882_01/server.112/e26088/functions003.htm#SQLRF20035

  "
  All except COUNT (*) GROUPING and GROUPING_ID aggregate functions ignore NULL values. You can use the NVL function in the argument of an aggregation function to substitute a value for a null value. COUNTY and REGR_COUNT never return null, but return a number or zero. For all remaining functions of aggregation, * if the DataSet contains no line, * or if it contains only the rows with NULL values as arguments to the aggregate function, * then the function returns null.*
  "

• Performance of the aggregate function.

  Hello
  
  Version 11.2.0 Oracle
  
  I'm not a PL/SQL Developer, however, I decided to write this aggregate out function. Oracle has it but I tried TimesTen database in memory that does not yet function stddev.
  
  The code is as follows:

  CREATE OR REPLACE TYPE MyStddevImpl AS OBJECT
  (
    v_power NUMBER, -- sum(power^2) of the column
    v_sum   NUMBER, -- average value
    v_iteration NUMBER, -- count(1)
  
    STATIC FUNCTION ODCIAggregateInitialize(sctx IN OUT MyStddevImpl)
      RETURN number,
  
    MEMBER FUNCTION ODCIAggregateIterate(self IN OUT MyStddevImpl,
      value IN number)
      RETURN number,
  
    MEMBER FUNCTION ODCIAggregateTerminate(self IN MyStddevImpl,
      returnValue OUT number, flags IN number)
      RETURN number,
  
    MEMBER FUNCTION ODCIAggregateMerge(self IN OUT MyStddevImpl,
     ctx2 IN MyStddevImpl)
     RETURN number
  );
  /
  show error
  
  CREATE OR REPLACE TYPE BODY MyStddevImpl
  AS
  STATIC FUNCTION ODCIAggregateInitialize(sctx IN OUT MyStddevImpl)
  RETURN number
  AS
  BEGIN
    sctx := MyStddevImpl(0,0,0);
    RETURN ODCIConst.Success;
  END;
  
  MEMBER FUNCTION ODCIAggregateIterate(self IN OUT MyStddevImpl, value IN number)
  RETURN number
  AS
  BEGIN
    self.v_sum   := self.v_sum + value;   -- used to get averages
    self.v_power := self.v_power + power(value,2);
    self.v_iteration := self.v_iteration + 1;  -- total  number of rows
    return ODCIConst.Success;
  END;
  
  MEMBER FUNCTION ODCIAggregateTerminate(self IN MyStddevImpl, returnValue OUT
                                         number, flags IN number)
  RETURN number
  AS
    v_avg number;
  BEGIN
    v_avg :=  self.v_sum/self.v_iteration;   -- this is the average value
     -- sqrt((sum(power(amount_sold,2))-(count(1)*power(avg(amount_sold),2)))/(count(1)-1))
    returnValue := sqrt((self.v_power - (self.v_iteration * power(v_avg,2))) /(self.v_iteration-1));
    RETURN ODCIConst.Success;
  EXCEPTION
    WHEN VALUE_ERROR
    THEN
      RETURN ODCIConst.error;
  END;
  
  MEMBER FUNCTION ODCIAggregateMerge(self IN OUT MyStddevImpl, ctx2 IN
  MyStddevImpl)
  RETURN number
  AS
  BEGIN
   RETURN ODCIConst.Success;
  END;
  END;
  /
  show error
  CREATE OR REPLACE FUNCTION MyStddev (input NUMBER)
  RETURN number
  AGGREGATE USING MyStddevImpl;
  /
  show error
  exit

  Now, it works very well and returns the results OK.

  select mystddev(amount_sold) AS "My standard deviation", stddev(amount_sold) from sales;
  
  My standard deviation STDDEV(AMOUNT_SOLD)
  --------------------- -------------------
              259.78049           259.78049

  The problem I have is that it takes 10.5 sec to run

   select mystddev(amount_sold) from ssdtester.sales;
  
  MYSTDDEV(AMOUNT_SOLD)
  ---------------------
             273.172955
  
  Elapsed: 00:00:10.48
  
  Execution Plan
  ----------------------------------------------------------
  Plan hash value: 1047182207
  
  ----------------------------------------------------------------------------
  | Id  | Operation          | Name  | Rows  | Bytes | Cost (%CPU)| Time     |
  ----------------------------------------------------------------------------
  |   0 | SELECT STATEMENT   |       |     1 |     5 |  1324   (1)| 00:00:16 |
  |   1 |  SORT AGGREGATE    |       |     1 |     5 |            |          |
  |   2 |   TABLE ACCESS FULL| SALES |  1000K|  4882K|  1324   (1)| 00:00:16 |
  ----------------------------------------------------------------------------
  
  
  Statistics
  ----------------------------------------------------------
            1  recursive calls
            0  db block gets
         4965  consistent gets
            0  physical reads
            0  redo size
          558  bytes sent via SQL*Net to client
          524  bytes received via SQL*Net from client
            2  SQL*Net roundtrips to/from client
            0  sorts (memory)
            0  sorts (disk)
            1  rows processed

  Is there any scope to improve this code. Specifically can I use avg function in the code instead of working on myself?
  
  Thank you
  
  Mich
  
  Published by: Mich Talebzadeh on February 13, 2012 12:20

  >
  May I ask what is the purpose of the model of aggregate by Oracle functions if it will be row-by-row and he's not going to be effective.
  >
  Oracle online the way you did in your function.

  Your function, using the technology of data cartridges, will be called by Oracle for EACH LINE it reads each line corresponding to your query. This requires a change in context of SQL, PL/SQL, and then back to SQL. It is a very expensive operation in terms of time.

  The Oracle SQL engine is not that way for aggregate functions it provides. The functionality of data cartridge is provided to allow developers to extend Oracle to provide features that Oracle is not provde all. Use of these functions of cartridge cases, you develop may not be 'slow' because there is no equivalent Oracle to compare to. You can use the features of your new cartridge or do you without; you have no other choice.

  You should always use SQL from Oracle to do the job unless you are doing something that can be done in SQL. Then you should use of Oracle PL/SQL features (for example in BULK of treatment) to do the more complex things. Finally if you need to do something just that Oracle cannot do with out-of-the-box SQL or PL/SQL, then you turn cartridge data, custom Java or C code or other external solutions which you can interface to Oracle.

  The order of the solutions, you should look at is:
  1 SQL
  2 PL/SQL
  3 Java/C external
  4 data cartridge

  He explains a little better? (and it is frankly win again in a minute or two!)

• analytical function and the aggregate function

  What are the analytical function and the aggregate function. What is the difference between them?

  Hello

  Analytic Functions : -.

  Analytical functions calculate a value of aggregation based on a group of lines. They differ from aggregate functions because they return several rows for each group. The Group of rows is called a window and is defined by the analytic_clause. For each line, a sliding window of lines is defined. The window determines the range of lines used for the calculations for the current line. Window sizes can be based on a physical number of rows or a logic as the time interval.
  Analytical functions are the last set of operations performed in a query with the exception of the last ORDER BY clause. Every joint and every WHERE, GROUP BY and HAVING clauses are met before the analytical functions are handled. As a result, analytic functions can only appear in the select list or the ORDER BY clause.
  Analytical functions are commonly used to calculate cumulative aggregates, moving, centered and considered.

  Aggregate functions : -.

  Aggregate functions return a line of single result based on the groups of lines, rather than on the unique lines. Aggregate functions can appear in selection lists, as well as in the HAVING and ORDER BY clauses. They are commonly used with the GROUP BY clause in a SELECT statement, where Oracle Database splits the rows in a table when asked or seen in groups. In a query that contains a GROUP BY clause, the select list items can be aggregation functions, GROUP BY constant expressions or expressions involving one of them. Oracle applies the functions of aggregation for each group of rows and returns a single result for each group line.
  If you omit the GROUP BY clause, Oracle then applies any aggregate functions in the select list for all rows in the table queried or the view. You use aggregate functions in the HAVING clause to eliminate groups of the output based on the results of aggregate functions, rather than the values of the individual lines of the queried table or view.

  Let me know if you feel any problem understanding.
  Thank you.

  Published by: varun4dba on January 27, 2011 15:32

• Why is it not possible to use SIRI on my apple TV remote to control the HomeKit products? I should be able to control all the devices with my Apple TV remote and SIRI HomeKit!

  Why is it not possible to use SIRI on my apple TV remote to control the HomeKit products? I should be able to control all the devices of HomeKit with my SIRI voice remote control and using Apple TV!

  If the new apple TV can act as a concentrator HomeKit and I use SIRI on my iPhone to control my locks, thermostat, lights, etc. Why am I not able to do the same thing with SIRI via voice commands on my Apple TV remote? When is this going to work?

  Also, when Apple will come out with a response to the echo of Amazon? I've tired to wait... do it already! If you build it, they will come...

  Thank you!

  This is a community to a user, and Apple will not see your rant. If you have suggestions about Apple TV, Siri and HomeKit the best thing to do is to submit your comments here. http://www.Apple.com/feedback/AppleTV.html

• Get annoying action ads at the top of the Yahoo home page. I always use Firefox and haven't changed the settings, then why the big announcements? I know that they are put there by Yahoo\, but they were not there before, and they aren't there when I open

  Get annoying action ads at the top of the Yahoo home page. I always use Firefox and haven't changed the settings, then why the big announcements? I know that they are put there by Yahoo, but they were not there before and they aren't there when I open Yahoo with Explorer.

  Install adblock more with subscription easylist and check

  • https://addons.Mozilla.org/en-us/Firefox/addon/Adblock-Plus/

• Why the volume is so low when I use Google on my iPhone 6?

  Why the volume is so low when I use Google on my iPhone 6?

  When you use Google to do what? Are how much you referring?

• Why the temperature shows on my watch always different temperature on the watch of my husband when they use the same application?

  Why the temperature still showing on my watch shows a different temperature than on my husband watch when they both use the same weather app?

  Hi Jodie

  If you are each using the weather app (which is included in the framework of the iOS and watchOS), the following steps can help (followed by each of you):

  • On your iPhone, in the weather app:
    • If using anything other than the current location (which is included by default), make sure you have each added to a common location / city.
    • To add another location, select the icon «+»
  • On your iPhone, in the application of the watch, go to: My Watch (tab) > weather > default City > make sure you have each selected at the same location (for example: place of current residence or Mount Laurel).
  • On your iPhone, go to: settings > privacy > location Services:
    • Ensure that the location service is enabled;
    • Make sure Apple Watch is face value while it helps;
    • Check that the weather is set to always;
  • On your iPhone, go to: settings > general > background App update:
    • Check that the bottom App Refresh is enabled.
    • It can also help to activate the setting for the weather.
  • For optimal performance of your watch, keep the Bluetooth and Wi - Fi enabled at all times on your iPhone:
    • iPhone: settings > Bluetooth - on.
    • iPhone: settings > Wi - Fi - on.

• Why the Desktop Cleanup Wizard brand most used icons used as ever?

  No idea why my Desktop Cleanup Wizard marks my most that never used to use icons and offers to delete?

  I can do anything except turn off reminders of 60 days?

  Hello

  Usually, the Office Assistant filter does not remove the icons, they are moved to a folder and you can put them on the desktop if you want. The folder that is automatically created the first time, the wizard removes icons is
  C:\Documents and Settings\UserName\Desktop\Unused desktop shortcuts.

  But back to your question:
  I put t know why the office cleaner chooses the most used icons on the desktop for cleaning but why don t you disable this feature?

  To stop the wizard to run automatically 60 days:

  1. right click on an empty spot on the desktop and then click Properties to open the display properties dialog box.
  2. click on the Desktop tab.
  3. click on the desktop to open the desktop items dialog box customize.
  4. Click to disable the wizard desktop cleanup run every box of 60 days.
  5. click OK twice to close the dialog boxes.

  Please also check MS Web site that provides this information:
  http://support.Microsoft.com/kb/320154