Top N rows based on aggregate function

Hi,
I need to get a report in the following format
F_A F_B F_C Count_comb
100 200 300 5
100 201 300 5
100 202 301 4
100 203 111 3
Here, the Count_comb column gives the count of records which have the same (F_A + F_B + F_C) combination. The requirement is to show the Top-N combinations where the tied rows would have the same rank --that is if (100,200,300) combo and (100,201,300) combo have the same count, they should both be ranked the same.
I think this involves performing the rank() function on the count(), for which i was not able to write an SQL. Any help in this direction is appreciated.
Thanks,
<cfdoubt>
PS : Pardon the alignment--i hope you can make out what i mean

Hi Joseph
Hope this query satisfies your Need
Select f_a,f_b,f_c,cnt,     dense_rank() over(order by cnt desc) rk
From (
select f_a,
     f_b,
     f_c,
     count(*) cnt
from test
group by f_a,f_b,f_c
F_A F_B F_C CNT RK
100 200 300 5 1
100 201 300 5 1
100 202 301 4 2
100 203 111 3 3
Regards
Shajesh Nair
[email protected]

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SSRS - Interactive sorting based on aggregate function

Hi,
I'm trying to add interactive sorting to one of the columns in my tablix.
The soring should be based on the LAST visit date of my child grouping. However interactive sorting is not compatible with aggregate functions apparently.
I'm using the following expression to sort on the period since the last visit:
=DateDiff(
"d"
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,Today()
Anyone an idea how to get this done?
Regards,
LiskieWhisky

Thanks for the input,
Qiuyun Yu: I already applied your method but my issues is that the visit dates are on de level of my
child grouping and per child multiple visit dates are possible. Since I want to complute the days since the last visit I need to take the last visit date and subtract it from today's date.
As you can see there are 2 dates. To compute the days since the last visit I take the last visit date (2015-04-17)
and subtract it from today (2015-04-27). This gives me 10 days. That's ok, no problem there.
But because I'm using the Last() function, I cannot use this expression in the Interactive sorting expression.
LucasF: You are right, but if it's possible to do this in the report I'd prefer that. But ultimately if it's necessary I'll have to do it in MDX then.
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LiskieWhisky

Selecting top 10 rows based on one column.

Hi,
I need to display the top 10 records for each distinct value of a column.

USE Northwind;
-- Solution 1
SELECT S.SupplierID, S.CompanyName, CA.ProductID, CA.UnitPrice
FROM dbo.Suppliers AS S
CROSS APPLY
(SELECT TOP (10) *
FROM dbo.Products AS P
WHERE P.SupplierID = S.SupplierID
ORDER BY UnitPrice DESC, ProductID DESC) AS CA
ORDER BY S.SupplierID, CA.UnitPrice DESC, CA.ProductID DESC;
-- Solution 2
WITH C AS
SELECT S.SupplierID, S.CompanyName, P.ProductID, P.UnitPrice,
ROW_NUMBER() OVER(
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ORDER BY P.UnitPrice DESC, P.ProductID DESC) AS RowNum
FROM dbo.Suppliers AS S
JOIN dbo.Products AS P
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Best Regards,Uri Dimant SQL Server MVP,
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How to use Aggregate Functions during Top N analysis?

Say i want to find top 5 highest salaries and their totals and average. In that case how to use aggregate functions. Please give me an example on this.
Regards,
Renu
Message was edited by:
user642387

Hi,
Yes, you can do that with aggregate functions.
First, do a sub-query to retrieve all the salaries (in descending order), then say "WHERE ROWNUM <= 5" in the main query. Use the aggregate SUM and AVG functions in the main query.
Analytic functions are easier to use for jobs like this, once you get familiar with them. If you're not leaving the field this month, then it's probably worthwhile for you to get familiar with analytic functions.

Aggregate function in native query (EJB 3.0)

How do you run a aggregate function in a native query? I have a particular use case, for reporting purposes, where the result set is too large to fetch the actual CMP collection, thus I need to execute a native count/avg select. I want some thing like,
Integer totalRecords = (Integer)
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Oracle is intelligent enough to use index only if query result filtering is based on it and result set is less than 5% of the total data set.Sorry to be blunt but that 5% stuff is nonsense.
Here since the index column is not used in the WHERE clause, oracle performs full table scan.That's not true either. Under the right circumstances the optimizer can use the index, even without a WHERE clause in the query:
SQL> create table t as select * from dba_objects where object_type is not null;
Table created.
SQL> alter table t modify object_type not null;
Table altered.
SQL> create index t_idx on t(object_type);
Index created.
SQL> explain plan for
2 select object_type, count(*) from t group by object_type;
Explained.
| Id | Operation             | Name | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT      |       |    44 |   396 |    60   (7)| 00:00:01 |
|   1 | HASH GROUP BY        |       |    44 |   396 |    60   (7)| 00:00:01 |
|   2 |   INDEX FAST FULL SCAN| T_IDX | 72474 |   636K|    57   (2)| 00:00:01 |
-------------------------------------------------------------------------------With the OP's query, it (apparently) can not be satisfied by using only the index.
WHERE TO_CHAR(COL) = TO_CHAR(COL)I don't even know what this means. Usually if you perform a function on an indexed column, the optimizer will not use the index (unless of course it's an fbi).

Using aggregate function count

hi experts,
I want to select 2 fields from a table and put into structure (gw_konzs.) and with respect to that i want to use aggregate function count(*) for knowing how many rows has been selected ? and i dont want to use select & endselect
please help regarding this ...........
for example:
select konts ltext from ztab into corresponding fields of gw_konzs.
select count(*) from kna1 into gw_konzs
where konzs = gw_konzs-konzs.
append gw_konzs to gt_konzs
endselect.

hi experts,
I want to select 2 fields from a table and put into structure and i want to select based on the where condition i dont want to use select & endselect
please help regarding this ...........
rewarded if useful
for example:
gw_detail & gw_konzs is structure
gt_detail & gt_konzsis internal table
select kunnr name1 from kna1 into corresponding fields of gw_detail where konzs = gw_konzs-konzs.
gw_detail-konzs = gw_konzs-konzs.
append gw_detail-konzs to gt_detail-konzs
endselect.

Analytic function and aggregate function

What are analytic function and aggregate function. What is difference between them?

hi,
Analytic Functions :----------
Analytic functions compute an aggregate value based on a group of rows. They differ from aggregate functions in that they return multiple rows for each group. The group of rows is called a window and is defined by the analytic_clause. For each row, a sliding window of rows is defined. The window determines the range of rows used to perform the calculations for the current row. Window sizes can be based on either a physical number of rows or a logical interval such as time.
Analytic functions are the last set of operations performed in a query except for the final ORDER BY clause. All joins and all WHERE, GROUP BY, and HAVING clauses are completed before the analytic functions are processed. Therefore, analytic functions can appear only in the select list or ORDER BY clause.
Analytic functions are commonly used to compute cumulative, moving, centered, and reporting aggregates.
Aggregate Functions :----------
Aggregate functions return a single result row based on groups of rows, rather than on single rows. Aggregate functions can appear in select lists and in ORDER BY and HAVING clauses. They are commonly used with the GROUP BY clause in a SELECT statement, where Oracle Database divides the rows of a queried table or view into groups. In a query containing a GROUP BY clause, the elements of the select list can be aggregate functions, GROUP BY expressions, constants, or expressions involving one of these. Oracle applies the aggregate functions to each group of rows and returns a single result row for each group.
If you omit the GROUP BY clause, then Oracle applies aggregate functions in the select list to all the rows in the queried table or view. You use aggregate functions in the HAVING clause to eliminate groups from the output based on the results of the aggregate functions, rather than on the values of the individual rows of the queried table or view.
let me know if you are feeling any problem in understanding.
thanks.
Edited by: varun4dba on Jan 27, 2011 3:32 PM

Pivot table wihtout Aggregate Functions ( Urgent Please. )

I am trying to select date and time. But having a hard time since I dont have any aggregate function that is needed. Just pivot the rows to columns.
IN sql
stage
starttime
endtime
1
1/22/2011 15:31
1/22/2011 15:32
2
1/22/2011 15:33
1/22/2011 15:34
3
1/22/2011 15:35
1/22/2011 15:36
Required
starttime_s1
endtime_s1
starttime__s2
endtime_s2
starttime_s3
endtime_s3
1/22/2011 15:31
1/22/2011 15:32
1/22/2011 15:33
1/22/2011 15:34
1/22/2011 15:35
1/22/2011 15:36

What is it that you're trying to accomplish with this?
The reason I ask is that pivoting data is a display function and therefore best left to the application or reporting tier.
If you're going to insist on "driving screws with a hammer" and really want to do this in SQL, the next question is, Is there a set number of "Stages" that will exist? Is it always going to be 3 stages and only 3 stages?
If the answer is YES, there will be a fixed number of stages, then it's a simple thing to do with either a PIVOT or CASE statements. (my personal preference is to use case statements, especially if you're pivoting 2 or more columns)
If the answer is NO, the number is stages can vary... You're left with a Dynamic PIVOT. Dynamic Pivots are a bit more complex to write but there is enough sample code out on the interwebs that you won't have a problem finding the correct syntax.
The real problem with a Dynamic Pivot query is the fact that it's pretty much useless. You can't do much (if anything at all) with it... Due to the fact that they have variable numbers of columns, they can't be used in views or procs and I can't think of
a singe, off the shelf, reporting platform that will allow accommodate data source that has a different number of columns every time it executes... So unless you're going to be content looking at the results in SSMS or developing a custom application, I don't
see the point.
Also... Aggregates aren't a problem based on the data you're showing. You only have 1 start time and 1 end time per stage. Using either the MIN or MAX aggregate functions will work to give you the desired result.
Anyway, hope that helps,
Jason
Jason Long

BI-IP - Bex Analyser - select excel single row and aplly planning function

Hi experts,
In BI-IP (BW 7) with Bex Analyser, is it possible to select a single excel row (or a range of rows) and then apply a planning function? I know that in WAD it's possible with the binding option to select a single web item.
The purpose is to apply a revaluation factor to selected (by the user) cost elements rows in the workbook.
Thanks and regards,
MA

Hi
It is possibel in WAD to select one or many rows while executing Functions such as--Reposting; Revaluation etc.
However, you should be in a position to select the rows based on....unique identifier such as Require ID; Request #; Serial #; ....this is more so in case of multiple entries for the same cost element for different combinations.
Regards
Srinivas

Trying to create a Histogram type/object for aggregate functions

Hi,
I am trying to create an aggregate function that will return a histogram
type.
It doesn't have to be an object that is returned, I don't mind returning
a string but I would like to keep the associative array (or something
else indexed by varchar2) as a static variable between iterations.
I started out with the SecondMax example in
http://www.csis.gvsu.edu/GeneralInfo/Oracle/appdev.920/a96595/dci11agg.htm#1004821
But even seems that even a simpler aggregate function like one strCat
below (which works) has problems because I get multiple permutations for
every combination. The natural way to solve this would be to create an
associative array as a static variable as part of the Histogram (see
code below). However, apparently Oracle refuses to accept associate
arrays in this context (PLS-00355 use of pl/sql table not allowed in
this context).
If there is no easy way to do the histogram quickly can we at least get
something like strCat to work in a specific order with a "partition by
... order by clause"? It seems that even with "PARALLEL_ENABLE"
commented out strCat still calls merge for function calls like:
select hr,qtr, count(tzrwy) rwys,
noam.strCat(cnt) rwycnt,
noam.strCat(tzrwy) config,
sum(cnt) cnt, min(minscore) minscore, max(maxscore) maxscore from
ordrwys group by hr,qtr
Not only does this create duplicate entries in the query result like
"A,B,C" and "A,C,B" it seems that the order in rwycnt and config are not
always the same so a user can not match the results based on their
order.
The difference between my functions and functions like sum and the
secondMax demonstrated in the documentation is that secondMax does not
care about the order in which it gets its arguments and does not need to
maintain an ordered set in order to return the correct results. A good
example of a built in oracle function that does care about all its
arguments and probably has to maintain a similar data structure to the
one I want is the PERCTILE_DISC function. If you can find the code for
that function (or something like it) and forward a reference to me that
in itself would be very helpful.
Thanks,
K.Dingle
CREATE OR REPLACE type Histogram as object
-- TYPE Hist10 IS TABLE OF pls_integer INDEX BY varchar2(10),
-- retval hist10;
-- retval number,
retval noam.const.hist10,
static function ODCIAggregateInitialize (sctx IN OUT Histogram)
return number,
member function ODCIAggregateIterate (self IN OUT Histogram,
value IN varchar2) return number,
member function ODCIAggregateTerminate (self IN Histogram,
returnValue OUT varchar2,
flags IN number) return number,
member function ODCIAggregateMerge (self IN OUT Histogram,
ctx2 IN Histogram) return number
CREATE OR REPLACE type body Histogram is
static function ODCIAggregateInitialize(sctx IN OUT Histogram) return
number is
begin
sctx := const.Hist10();
return ODCIConst.Success;
end;
member function ODCIAggregateIterate(self IN OUT Histogram, value IN
varchar2)
return number is
begin
if self.retval.exist(value)
then self.retval(value):=self.retval(value)+1;
else self.retval(value):=1;
end if;
return ODCIConst.Success;
end;
member function ODCIAggregateTerminate(self IN Histogram,
returnValue OUT varchar2,
flags IN number)
return number is
begin
returnValue := self.retval;
return ODCIConst.Success;
end;
member function ODCIAggregateMerge(self IN OUT Histogram,
ctx2 IN Histogram) return number is
begin
i := ctx2.FIRST; -- get subscript of first element
WHILE i IS NOT NULL LOOP
if self.retval.exist(ctx2(i))
then self.retval(i):=self.retval(i)+ctx2.retval(i);
else self.retval(value):=ctx2.retval(i);
end if;
i := ctx2.NEXT(i); -- get subscript of next element
END LOOP;
return ODCIConst.Success;
end;
end;
CREATE OR REPLACE type stringCat as object
retval varchar2(16383), -- concat of all value to now varchar2, --
highest value seen so far
static function ODCIAggregateInitialize (sctx IN OUT stringCat)
return number,
member function ODCIAggregateIterate (self IN OUT stringCat,
value IN varchar2) return number,
member function ODCIAggregateTerminate (self IN stringCat,
returnValue OUT varchar2,
flags IN number) return number,
member function ODCIAggregateMerge (self IN OUT stringCat,
ctx2 IN stringCat) return number
CREATE OR REPLACE type body stringCat is
static function ODCIAggregateInitialize(sctx IN OUT stringCat) return
number is
begin
sctx := stringCat('');
return ODCIConst.Success;
end;
member function ODCIAggregateIterate(self IN OUT stringCat, value IN
varchar2)
return number is
begin
if self.retval is null
then self.retval:=value;
else self.retval:=self.retval || ',' || value;
end if;
return ODCIConst.Success;
end;
member function ODCIAggregateTerminate(self IN stringCat,
returnValue OUT varchar2,
flags IN number)
return number is
begin
returnValue := self.retval;
return ODCIConst.Success;
end;
member function ODCIAggregateMerge(self IN OUT stringCat,
ctx2 IN stringCat) return number is
begin
self.retval := self.retval || ctx2.retval;
return ODCIConst.Success;
end;
end;
CREATE OR REPLACE FUNCTION StrCat (input varchar2) RETURN varchar2
-- PARALLEL_ENABLE
AGGREGATE USING StringCat;

GraphicsConfiguration is an abstract class. You would need to subclass it. From the line of code you posted, it seems like you are going about things the wrong way. What are you trying to accomplish? Shouldn't this question be posted in the Swing or AWT forum?

Pivot table in BI Publisher: Different aggregate functions in data columns

Hi, everyone!
I`ve got some troubles with pivot table in my rtf-template.
Here is my xml:
<ROWSET>
     <ROW>
          <_BI_SUBRF_MO_._MUN_NAME_>МО Петроградский р-н</_BI_SUBRF_MO_._MUN_NAME_>
          <_BI_PERS_ACCOUNT_CARD_._BI_PAC_NMB_>714000003</_BI_PERS_ACCOUNT_CARD_._BI_PAC_NMB_>
          <_BI_MONTH_DEBET_._BI_DEBET_SUM_>0.0</_BI_MONTH_DEBET_._BI_DEBET_SUM_>
          <_BI_CALENDAR_._YEAR__>2009</_BI_CALENDAR_._YEAR__>
          <_BI_CALENDAR_._MONTH__>8</_BI_CALENDAR_._MONTH__>
     </ROW>
     <ROW>
          <_BI_SUBRF_MO_._MUN_NAME_>МО Петроградский р-н</_BI_SUBRF_MO_._MUN_NAME_>
          <_BI_PERS_ACCOUNT_CARD_._BI_PAC_NMB_>714000004</_BI_PERS_ACCOUNT_CARD_._BI_PAC_NMB_>
          <_BI_MONTH_DEBET_._BI_DEBET_SUM_>165.58</_BI_MONTH_DEBET_._BI_DEBET_SUM_>
          <_BI_CALENDAR_._YEAR__>2009</_BI_CALENDAR_._YEAR__>
          <_BI_CALENDAR_._MONTH__>7</_BI_CALENDAR_._MONTH__>
     </ROW>
     <ROW>
          <_BI_SUBRF_MO_._MUN_NAME_>МО Петроградский р-н</_BI_SUBRF_MO_._MUN_NAME_>
          <_BI_PERS_ACCOUNT_CARD_._BI_PAC_NMB_>714000004</_BI_PERS_ACCOUNT_CARD_._BI_PAC_NMB_>
          <_BI_MONTH_DEBET_._BI_DEBET_SUM_>165.58</_BI_MONTH_DEBET_._BI_DEBET_SUM_>
          <_BI_CALENDAR_._YEAR__>2009</_BI_CALENDAR_._YEAR__>
          <_BI_CALENDAR_._MONTH__>7</_BI_CALENDAR_._MONTH__>
     </ROW>
...... and so on..
</ROWSET>
In the pivot table i`d like to see one row for every BISUBRF_MO_._MUN_NAME_ using BICALENDAR_._YEAR__ and BICALENDAR_._MONTH__ as measures and sum of BIMONTH_DEBET_._BI_DEBET_SUM_ and count of unique (or at least just count of) BIPERS_ACCOUNT_CARD_._BI_PAC_NMB_ in cells.
I create a pivot table using wizard, everything ok except one thing: as i understand, in pivot table for data in rows we can use only one kind of aggregate function e.g. only sum or only count.
Is there any way to use different aggregate functions in data cells?
Thank you

As you can see, when we use crosstab tag we can specify only one aggregate function for data cells.
Is there any way to get in XSL-FO (where we can what really happens) instead of:
<T1>
<xsl:value-of select="sum(current-group()/_BI_PERS_ACCOUNT_CARD_._BI_PAC_UNID_)"/>
</T1>
<T2>
<xsl:value-of select="sum(current-group()/_BI_MONTH_DEBET_._BI_DEBET_SUM_)"/>
</T2>
this
<T1>
<xsl:value-of select="sum(current-group()/_BI_PERS_ACCOUNT_CARD_._BI_PAC_UNID_)"/>
</T1>
<T2>
<xsl:value-of select="count(current-group()/_BI_MONTH_DEBET_._BI_DEBET_SUM_)"/>
</T2>
Edited by: user12115038 on 26.10.2009 8:08

Why doesn't PIVOT clause work with COLLECT aggregate function in 11g ?

Hello all !
I am really puzzled as to what is considered an aggregate function in the context of the PIVOT clause in 11g.
I have been toying with quite a few things related to collections lately and this arose as an aside :
CREATE TABLE TEST_COLL
   NODE_ID    VARCHAR2(15 CHAR) NOT NULL,
   NODE_VALUE VARCHAR2(45 CHAR) NOT NULL,
   NODE_LEVEL NUMBER(1)         NOT NULL
CREATE OR REPLACE TYPE TREE_NODE AS OBJECT
   NODE_KEY VARCHAR2( 15 CHAR),
   NODE_NAME VARCHAR2(127 CHAR)
CREATE OR REPLACE TYPE TREE_NODES AS TABLE OF TREE_NODE NOT NULL;At this stage I am sure we all agree that the query
SELECT NODE_LEVEL,
       CAST(COLLECT(TREE_NODE(NODE_ID, NODE_VALUE)) AS TREE_NODES) AS NODES
FROM TEST_COLL
GROUP BY NODE_LEVEL;is perfectly valid as the COLLECT function is an aggregate function according to the [Official Documentation|http://docs.oracle.com/cd/E11882_01/server.112/e10592/functions031.htm#i1271564]
But then, one of the following two queries should work
SELECT CAST(REGION_NODES     AS TREE_NODES) AS REGIONS,
       CAST(DEPARTMENT_NODES AS TREE_NODES) AS DEPARTMENTS,
       CAST(AREA_NODES       AS TREE_NODES) AS AREAS,
       CAST(CENTRE_NODES     AS TREE_NODES) AS CENTRES
FROM (SELECT NODE_LEVEL, TREE_NODE(NODE_ID, NODE_VALUE) AS NODE
          FROM TREE_COLL
PIVOT (COLLECT(NODE) FOR NODE_LEVEL IN (1 AS REGION_NODES,
                                         2 AS DEPARTMENT_NODES,
                                         3 AS AREA_NODES,
                                         4 AS CENTRE_NODES
or (better)
SELECT REGION_NODES     AS REGIONS,
       DEPARTMENT_NODES AS DEPARTMENTS,
       AREA_NODES       AS AREAS,
       CENTRE_NODES     AS CENTRES
FROM (SELECT NODE_LEVEL, TREE_NODE(NODE_ID, NODE_VALUE) AS NODE
          FROM TREE_COLL
PIVOT (CAST(COLLECT(NODE) AS TREE_NODES) FOR NODE_LEVEL IN (1 AS REGION_NODES,
                                                             2 AS DEPARTMENT_NODES,
                                                             3 AS AREA_NODES,
                                                             4 AS CENTRE_NODES
       );yet, both fail with
ORA-56902: expect aggregate function inside pivot operationInvestigating further, I found the same behaviour when using XMLAGG as the aggregate function in the PIVOT clause.
Is this normal ? And if it is, is there any other way to achieve the result I was anticipating ?
My version is
SQL> SELECT BANNER FROM V$VERSION;
BANNER
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
PL/SQL Release 11.2.0.3.0 - Production
CORE    11.2.0.3.0      Production
TNS for 64-bit Windows: Version 11.2.0.3.0 - Production
NLSRTL Version 11.2.0.3.0 - ProductionThanks in advance
Best Regards
Philip

Most likely a bug. But you can bypass it by using any other aggregate making sure group consists of a single row and apply collect to a pivoted value. Yes, the cost is double aggregation. And also there is another cost - you would need to create MAP member function otherwise aggreations like MAX/MIN, etc. will not work:
CREATE OR REPLACE TYPE TREE_NODE AS OBJECT
   NODE_KEY VARCHAR2( 15 CHAR),
   NODE_NAME VARCHAR2(127 CHAR),
   map member function f return varchar2
Type created.
CREATE OR REPLACE TYPE BODY TREE_NODE AS
map member function f return varchar2 is
begin
     return NODE_NAME;
end f;
end;
Type body created.
CREATE OR REPLACE TYPE TREE_NODES AS TABLE OF TREE_NODE NOT NULL
Type created.
SQL> select *
2    from test_coll
3 /
NODE_ID NODE_VALUE NODE_LEVEL
1       A                   1
2       B                   2
3       C                   3
4       D                   4
5       E                   1
6       F                   2
7       G                   3
8       H                   4
8 rows selected.
SQL> Now:
SELECT CAST(COLLECT(REGION_NODES)     AS TREE_NODES) AS REGIONS,
       CAST(COLLECT(DEPARTMENT_NODES) AS TREE_NODES) AS DEPARTMENTS,
       CAST(COLLECT(AREA_NODES)       AS TREE_NODES) AS AREAS,
       CAST(COLLECT(CENTRE_NODES)     AS TREE_NODES) AS CENTRES
FROM (
        SELECT ROWID RID,
                NODE_LEVEL,
                TREE_NODE(NODE_ID, NODE_VALUE) AS NODE
          FROM TEST_COLL
PIVOT (MAX(NODE) FOR NODE_LEVEL IN (
                                     1 AS REGION_NODES,
                                     2 AS DEPARTMENT_NODES,
                                     3 AS AREA_NODES,
                                     4 AS CENTRE_NODES
REGIONS(NODE_KEY, NODE_NAME)                         DEPARTMENTS(NODE_KEY, NODE_NAME)                     AREAS(NODE_KEY, NODE_NAME)                           CENTRES(NODE_KEY, NODE_NAME)
TREE_NODES(TREE_NODE('1', 'A'), TREE_NODE('5', 'E')) TREE_NODES(TREE_NODE('6', 'F'), TREE_NODE('2', 'B')) TREE_NODES(TREE_NODE('7', 'G'), TREE_NODE('3', 'C')) TREE_NODES(TREE_NODE('8', 'H'), TREE_NODE('4', 'D'))
SQL> SY.

Any difference between distinct and aggregate function in sql query cost???

Hi,
I have executed many sql stmts patterns- such as:
a) using a single table
b) using two tables, using simple joins or outer joins
but i have not noticed any difference in sql stmts in cost and in execution plan....
Anyway, my colleague insists on that using aggregate function is less costly compared to
distinct....(something i have not confirmed, that's why i beleive that they are exactly the same...)
For the above reffered 1st sql pattern.. we could for example use
select distinct deptno
from emp
select count(*), deptno
from emp
group by deptno select distinct owner, object_type from all_objects
select count(*), owner, object_type from all_objects
group by owner, object_typeHave you found any difference between the two ever...????
Note: I use Ora DB 10g v2.
Thank you,
Sim

distinct and aggregate function are for different uses and may give same result but if u r using aggregate function to get distinct records, it will be expensive...
ex
select distinct deptno from scott.dept;
Statistics
0 recursive calls
0 db block gets
2 consistent gets
0 physical reads
0 redo size
584 bytes sent via SQL*Net to client
488 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
4 rows processed
select deptno from scott.emp group by deptno;
Statistics
307 recursive calls
0 db block gets
60 consistent gets
6 physical reads
0 redo size
576 bytes sent via SQL*Net to client
488 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
6 sorts (memory)
0 sorts (disk)
3 rows processed
Nimish Garg
Software Developer
*(Oracle & ASP.NET)*
Indiamart Intermesh Limited, Noida
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Color report rows based on a value in that row

I would like to Color report rows based on a value in that row.
For examplle with the "EMP" table:
I would like job=MANAGER to be red and job=CLERK to be green etc etc
The other example I found only had the option of one color either the highlight or the default color.
I am looking for a way to do multiple colors.

Hi,
In the row template, you can use #1#, #2#, etc to indicate where a field in the report needs to be output. This does not have to be plain text - ie, you can use it within style tags if you like.
So, take a query like:
SELECT EMPNO,
ENAME,
DEPTNO,
DECODE(DEPTNO, 10, 'green', 20, 'red', 30, 'cyan', 'white') BG_COLOUR
FROM EMPYou get columns 1=empno, 2=ename, 3=deptno and 4=bg_colour. In the row template, you can then do:
Before Rows setting (sets up the table):
<table>
<tr><td>ID</td><td>Name</td><td>Dept</td></tr>After Rows setting (closes the table):
</table>Row Template 1 (used for ALL rows):
<tr style="background-color:#4#;"><td>#1#</td><td>#2#</td><td>#3#</td></tr>Then, for every row, the colour that has been calculated using the DECODE function will be used in the style tag to colour the background for the entire row.
How you determine the colours is up to you. I've used DECODE here, but you could use a field on the DEPT table to hold this and use this in your SQL statement.
Andy

Using an Aggregate Function in a Sub-SELECT

Ok. I have this Sub-SELECT and I'd like to base my outside query based on the resyult set of my inner Sub-SELECT which contains an Aggregate function.
Is that possible???
Here's the Query...
SELECT *
FROM CUSTPRO.CPM_PND_TRAN_HDR CPMPNDTH
INNER JOIN (SELECT CPMPNDT2.ky_pnd_seq_trans,
CPMPNDT2.id_ba_esco,
CPMPNDT2.ky_ba,
CPMPNDT2.ky_enroll,
MAX(CPMPNDT2.dt_billed_by_css)
FROM CUSTPRO.CPM_PND_TRAN_HDR CPMPNDT2
WHERE CPMPNDT2.ky_pnd_seq_trans IN (6544937)
GROUP BY CPMPNDT2.ky_pnd_seq_trans,
CPMPNDT2.id_ba_esco,
CPMPNDT2.ky_ba,
CPMPNDT2.ky_enroll) DERIVE1
ON CPMPNDTH.id_ba_esco = DERIVE1.id_ba_esco
AND CPMPNDTH.ky_ba = DERIVE1.ky_ba
AND CPMPNDTH.ky_enroll = DERIVE1.ky_enroll
AND CPMPNDTH.dt_billed_by_css = ????DERIVE1.MAX(CPMPNDT2.dt_billed_by_css)???
How can I designate that last qualifier ????....
PSULionRP

You should give your aggregate function a column-alias as in:
SELECT *
FROM   custpro.cpm_pnd_tran_hdr cpmpndth
       INNER JOIN (SELECT   cpmpndt2.ky_pnd_seq_trans,
                            cpmpndt2.id_ba_esco,
                            cpmpndt2.ky_ba,
                            cpmpndt2.ky_enroll,
                            Max(cpmpndt2.dt_billed_by_css) as XXX    -- ADDED THIS.
                   FROM     custpro.cpm_pnd_tran_hdr cpmpndt2
                   WHERE    cpmpndt2.ky_pnd_seq_trans IN (6544937)
                   GROUP BY cpmpndt2.ky_pnd_seq_trans,
                            cpmpndt2.id_ba_esco,
                            cpmpndt2.ky_ba,
                            cpmpndt2.ky_enroll) derive1
         ON cpmpndth.id_ba_esco = derive1.id_ba_esco
            AND cpmpndth.ky_ba = derive1.ky_ba
            AND cpmpndth.ky_enroll = derive1.ky_enroll
            AND cpmpndth.dt_billed_by_css = derive1.XXX
/

Top N rows based on aggregate function

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