SQL & PL/SQL :: Other Columns When Using Group By

PL/SQL :: Multiple Columns Using Group By

May 20, 2013

Can i select multiple columns while using group by single column?

Group By Multiple Columns / Count And Then Find A Max

May 24, 2008

I have three tables,let's say

table stores
sid | store_name
1 | one
2 | two
3 | three

table products
pid | sid | p_name
1 | 2 | pone
2 | 2 | ptwo
3 | 3 | pthree

table sales
said | sid | pid
1 | 2 | 1
2 | 3 | 1
3 | 2 | 2
4 | 1 | 3
5 | 2 | 2
6 | 3 | 2
7 | 3 | 2

and i want display the product that sells best in every store. I try to group by multiple columns counting how many times each product was sold in every store, but don't know how to select the one which was best sold (maximal number of times)

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SQL & PL/SQL :: Select Columns Of 3 Tables In Such A Way That Period Column Should Be In Group By Function

Aug 16, 2011

i want to select columns of 3 tables in such a way that period column should be in the group by function.

create view allocated_budgets_detail as
select ba.ba_fin_year, ba.ba_start_date, ba.ba_end_date, ba.ba_rev_no,
bh.bh_budget_code,
bd.bd_period,
bb.bb_entered_amount
from budget_header bh, budget_allocation ba, budget_distribution bd, budget_balance bb
where bh.bh_budget_id = ba.ba_budget_id
and ba.ba_line_id = bd.bd_budget_line_id
and ba.ba_line_id = bb.bb_budget_line_id
group by bd.bd_period

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PL/SQL :: To Create Function Based Index For Group Function Columns

Jun 15, 2012

Is anyway to create function based index for group function columns.

For example

select max(timestamp),min(age),averge(sal).... ... .. from tab;

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Group Records With Less Than One Hour Separation And Count How Many Per Group

Nov 1, 2013

I'm trying to group sets of data based on time separations between records and then count how many records are in each group.

In the example below, I want to return the count for each group of data, so Group 1=5, Group 2=5 and Group 3=5

SELECT AREA_ID AS "AREA ID",
LOC_ID AS "LOCATION ID",
TEST_DATE AS "DATE",
TEST_TIME AS "TIME"
FROM MON_TEST_MASTER
WHERE AREA_ID =89
AND LOC_ID ='3015'
AND TEST_DATE ='10/19/1994';

[code]....

Group 1 = 8:00:22 to 8:41:22

Group 2 = 11:35:47 to 11:35:47

Group 3 = 15:13:46 to 15:13:46

Keep in mind the times will always change, and sometime go over the one hour mark, but no group will have more then a one hour separation between records.

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SQL & PL/SQL :: Combining Rownum And Group By Gives - Not A Group By Expression

Jun 23, 2011

I read that rownum is applied after the selection is made and before "order by". So, in order to get the sum of salaries for all employees in all departments with a row number starting from 1, i wrote :

select ROWNUM,department_id,sum(salary) from employees group by department_id

If i remove rownum, it gives the correct output. Why can't rownum be used here ?

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SQL & PL/SQL :: Group Through Expression Inside Group By?

May 17, 2011

Refer to the txt file to create table and insert data.

I executed the following query-

SELECT priority, detail, COUNT(1) FROM TEST GROUP BY priority, detail

and got the following result-

PRIORITYDETAIL COUNT(1)

StandardPatch 27
StandardInitial TSS 1
StandardInitial development 10
StandardProduction deployment5
High PriorPatch 1

Now I want that Initial TSS and Initial development should be combined as Initial together and I should get the result as follows:

PRIORITYDETAIL COUNT(1)

StandardPatch 27
StandardInitial 11
StandardProduction deployment5
High PriorPatch 1

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Reports & Discoverer :: Create A Report By Using One Field / Text As Columns Name In Layout But Display All Columns

Jun 16, 2010

I want to create a report by using one field and one text as columns name in layout but display the all the columns. I mention the 5 column names in query.how can I write function in summary column.

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Performance Tuning :: Index 15 Columns When Cannot Predict Columns Will Be Used In Where Clause?

Apr 4, 2011

I am running a fairly busy Oracle 10gR2 DB, one of the tables has about 120 columns and this table receives on average 1500 insertions per second. The table is partitioned and the partitioning is based on the most important of the two timestamp columns. There are two timestamps, they hold different times.

Out of these 120 columns, about 15 need to be indexed. Out of the 15 two of them are timestamp, at least one of these two timestamp columns is always in the where clause the queries.

Now the challenge is, the queries we run can have any combination of the 13 other columns + one timestamp. In reality the queries never have more than 7 or 8 columns in the where clause but even if we had only 4 columns in the where clause we would still have the same problem.

So if I create one concatenated index for all these columns it will not be very efficient because after the 4th or 5th column the sorting would no longer be very useful and I believe the optimiser would simply not use the rest of the index. So queries that use the leading columns of the index in sequence work well, but if I need to query the 10th column the I have performance issues.

Now, if I create multiple single column indexes oracle will have to work a lot harder to maintain all these indexes and it will create performance issues (I have tried that). Besides, if I have multiple single column indexes the optimiser will do nested loops twice or three times and will hit only the first few columns of the where clause so I think it will kind of be the same as the long concatenated index.

What I am trying to do is exactly what the Bitmap index would do, it would be very good if I could use the AND condition that a Bitmap index uses. This way I could have N number of single column indexes which the optimiser could pick from and serve the query with exactly the ones it needs. But unfortunately using the Bitmap index here is not an option given the large amount of inserts that I get on this table.

I have been looking for alternatives, I have considered creating multiple shorter concatenated indexes but this still would not address the issue since many queries would still not be served properly and therefore would take a very long time to complete.

What I had in mind would be some sort of multidimensional index, I am not even sure if such thing exists. But essentially it would be some sort of index that could serve a query efficiently regardless of the fact that the where clause has the 1st, 3rd and last columns of the index.

So considering how widely used Oracle is and how many super large databases there are out there, this problem must be common.

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SQL & PL/SQL :: How To Select All Columns From Table Except Those Columns Which Type In Query

Jan 21, 2011

I have a two question.

Question 1:How to select all columns from table except those columns which i type in query

Question 2:How to select all columns from table where all columns are not null without type each column name which is in empty data

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To Add One Disk Group Space To Another Disk Group

May 9, 2011

Is there any way to add one disk group space to another disk group. Because One of my disk group is full i want to add space in to that group.

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SQL & PL/SQL :: Get Count On Group And Total Count For Each Group

Mar 23, 2013

I'm using this code, and it performs fine, but I'm wondering if there is a more elegant way to do it--maybe with "ROLLBACK". Basically (as you can see) I need to get a normal count for each group but also for each group take a percentage of the total count (so all groups pct adds up to 100 (oh yeah, don't test for zero below, but just a test... )

select
c.Event,
c.code,
count(1) as calls,
total.total_count,
count(1) / total.total_count * 100 as pct_of_total
from
table1 c

[Code]....

[Edit MC: add code tags, do it yourself next time]

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SQL & PL/SQL :: Function In Oracle To Select Not-null Columns At Beginning And Null Columns At End?

Jul 12, 2012

I have 8 columns. Some of them might be null.I want to display all 8 columns in my result. Not null columns will be first and null at the end.Here is a sample data :

Employee table :
Employee_id Emp_fname emp_lname emp_mname dept salary emp_height emp_weight
1 aaa ddd d1 100 6 180
2 bbb ccc 120 169
3 dfe d2 5.9 223

The expected result is :
result1 result2 result3 result4 result5 result6 result7 result8
1 aaa ddd d1 100 6 180
2 bbb ccc 120 169
3 dfe d2 5.9 223

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PL/SQL :: How To Transpose A Table From Rows To Columns Or Columns Into Rows

Aug 22, 2012

what are the collections available in Oracle Plsql, what are concepts of collection.

How to Transpose a Table from rows to columns or columns into rows.

DDL and DML concepts.

What is the concepts of statistics in Oracle Plsql.

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SQL & PL/SQL :: GROUP BY

Oct 10, 2011

CREATE TABLE TEMP_GP_SEQ
(
COL1 NUMBER,
COL2 NUMBER,
COL3 NUMBER,
COL4 NUMBER,
COL5 NUMBER,
COL6 NUMBER,
COL7 CHAR (25)
);

[Code]...

I need to update the TEMP_GP_SEQ table and on the COLUMN COL7 based on the grouping range mentioned above using the sequence created. But the sequence should not be incremented for each and every record, it should be incremented only for change of groups. For example

SELECT *
FROM TEMP_GP_SEQ;

COL1 COL2 COL3 COL4 COL5 COL6 COL7
110100
110101
12101001

[Code]...

After update it should look like

SELECT *
FROM TEMP_GP_SEQ;

COL1 COL2 COL3 COL4 COL5 COL6 COL7
110100
110101
12101001M2

[Code]...

Actually the group by fetched two rows with a total record count of 4 (2 records in both the rows). SO the COL7 is updated for these four rows with M as a prefixed word and the number followed after M is from the sequence. Here the number is changing (sequence is incrementing) only when there is a change in grouping criteria and it remains the same throughout a group.

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Using GROUP BY To Get Counts

Jan 22, 2008

how to logically connect two tables. Here is an example of what I'm trying to do:

HOSTS TABLE CPU TABLE
----------- ---------
ID HOST ID CPU
01 host1 01 proc01
02 host2 01 proc02
03 host3 02 proc01
02 proc02
02 proc03
02 proc04
03 proc01

Based on the above, I can see that 'host1' has 2 CPUs, 'host2' has 4 CPUs, and 'host3' has 1 CPU. What I'd like to do is create a query that would output:

HOST CPU
----------
host1 2
host2 4
host3 1

I'm looping through the hosts and passing the them into another query as bind variables. That's slow and cannot be the best way to do this. I'm aware that I need to using a GROUP BY HAVING COUNT, but that doesn't seem to be working. It tends to return the total count of all CPUs rather than CPUs per host.

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Group Policy In VPD

Jun 19, 2013

Give me some examples of creating grouped in VPD .

Group policy example for
1) Grouped policy on same table for different columns
2) Grouped policy on two different table for different columns

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SQL & PL/SQL :: Index And Group By

Sep 5, 2012

I have a query that extracts the row with a max(record_date) within a group.

select ssn, fund, type_indicator, annuitant, cur_year, record_date, guarantee
from LC_MORTALITY
where (ssn, fund, type_indicator, annuitant, cur_year, record_date) in
(select ssn, fund, type_indicator, annuitant, cur_year, max(record_date)
from LC_MORTALITY
group by ssn, fund, type_indicator, annuitant, cur_year);

the table has index that matches the group by clause exactly.

create index IDX_LC_MORTALITY_sftayd on LC_MORTALITY
(SSN,
FUND,
TYPE_INDICATOR,
ANNUITANT,
cur_year,
record_date

However, the plan ignores the index

---------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes |TempSpc| Cost (%CPU)| Time |
---------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1963K| 241M| | 1375K (4)| 05:21:04 |
|* 1 | HASH JOIN RIGHT SEMI| | 1963K| 241M| 9701M| 1375K (4)| 05:21:04 |
| 2 | VIEW | VW_NSO_1 | 145M| 8038M| | 241K (12)| 00:56:22 |
| 3 | HASH GROUP BY | | 145M| 8038M| | 241K (12)| 00:56:22 |
| 4 | TABLE ACCESS FULL| LC_MORTALITY | 145M| 8038M| | 219K (3)| 00:51:13 |
| 5 | TABLE ACCESS FULL | LC_MORTALITY | 145M| 9840M| | 222K (5)| 00:51:49 |
---------------------------------------------------------------------------------------------
[code]...

It uses the index but still shows "table access full" in one place. Why is there still a full access?Can I do anything to optimize further?

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SQL & PL/SQL :: How To Group By Data

Sep 8, 2011

My requirement is Data from a TableA has to be provided as an overall view

TABLEA
ID ENTITY REQ_FLG PAR_FLG EXT_FLG
CONV_1 ACCNT Y Y Y
CONV_1 PROD Y Y N
CONV_1 ADDR Y N N
CONV_2 DID Y N N
CONV_2 ORDER Y N N

Required to show the data in report as

ID Expand View_Report Populate ENTITY QRY_STATUS
CONV_1 Expand Report Populate
ACCNT Y Y Y
PROD Y Y Y
ADDR Y N N
CONV_2 Expand Report Populate
DID Y N N
ORDER Y N N

Where "Expand", "Report", "Populate" are provided as Hard coded values in query.

Sample Query.
SELECT ID
,'Expand' AS EXPAND
,'Report' AS VIEW_REPORT
, 'Populate / Reset' AS POP
, DECODE(MN_TBL.ENTITY,NULL,NULL,ENTITY) AS ENTITY
, REQ_FLG || ' ' || PAR_FLG || ' ' || EXT_FLG AS QRY_STATUS
FROM TABLEA
GROUP BY GROUPING SETS
((ID), (ENTITY, REQ_FLG , PAR_FLG , EXT_FLG ))
ORDER BY CONVERSION_ID, ENTITY

Above query works fine, where single ID is present

ID Expand View_Report Populate ENTITY QRY_STATUS
CONV_1 Expand Report Populate
ACCNT Y Y Y
PROD Y Y Y
ADDR Y N N

But when more than one ID is present the entire thing collapses

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SQL & PL/SQL :: Group By Thursday

Jun 26, 2013

My weekly reports should start from Thursday and it ends on Wednesday . I need to aggregate data from Thursday to Wednesday. At the end of every month i generate report for the last 4 weeks.

I couldn't find a way to group by correctly. When I make group by trunc(fragment_date,'day')+2 and check the data it aggregates data from Monday to Sunday.

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SQL & PL/SQL :: Group By Statement

Oct 27, 2011

SELECT COUNT(c.country_id)
FROM countries c,
employees e,
locations l,
departments d

[Code]....

I really dont know when and where to use the group by statement from the query above when I added C.country name before the word from I'm always getting this error "ORA-00979: not a GROUP BY expression"

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SQL & PL/SQL :: Group By Clause

Mar 31, 2011

This time, I am going to provide the DML statements.

I have a simple table with 3 fields in it.I want to group by ACCT_NUMBER and sum of BALANCE field. But I want to get the description of the first row in a group.

the statements below. Here there are two groups of records 2001 and 2002. My sql(which I am working on) should return the following :

2001 EMPL TRAINING-MIS 20
2002 OTHER PROF SERV-HR 40

The following query will group by ACCT_NUMBER and sum of the BALANCE field. But how can I get the DESCRIPTION?

SELECT ACCT_NUMBER, SUM(BALANCE)
FROM TEST
GROUP BY ACCT_NUMBER
CREATE TABLE "TEST"
("ACCT_NUMBER" VARCHAR2(20 BYTE),
"DESCRIPTION" VARCHAR2(20 BYTE),

[code]...

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SQL & PL/SQL :: Selecting 1 Row From A Group?

Jul 3, 2011

I am having trouble selecting the row that has max(pay_period) of 13. Here is some test data.

CREATE TABLE TESTME
(
SSN VARCHAR2(11 BYTE),
PAY_PERIOD VARCHAR2(3 BYTE),
PAY_YEAR NUMBER,
KRONOS_ID VARCHAR2(6 BYTE),
LAST_NAME VARCHAR2(15 BYTE),
FIRST_NAME VARCHAR2(14 BYTE),
ADJ_SALARY NUMBER
)

[code]....

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SQL & PL/SQL :: Group By For Getting Count

Mar 7, 2013

I need suing group by for getting count.I have a table with columns below

SYS_AUDIT_IDSYS_AUDIT_PROG_IDPROG_FINDING_ID_COUNT

178921652
178921641
178921631
179321521
179321511
179321501
179321491
179321461

I want to count number of SYS_AUDIT_PROG_ID for each audit and count of PROG_FINDING_ID_COUNT

I want to get
1789 3 4

I tried this query but this is not working

[code]select sys_audit_id ,count (sys_audit_prog_id), count(prog_finding_id_count) from

my_table sub
group by sys_audit_id [/code]

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SQL & PL/SQL :: Group Functions

Jul 2, 2010

count the no: of emp working under each manager? and instead of manager number display the manager name

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SQL & PL/SQL :: Group By Query

Nov 5, 2011

I am new to PL/SQL, could you pls let me know how to solve this requirement using PL SQL

C-A | C-B
A123 | -1
B334 | 4
B567 | 2
B333 | -1
T777 | 2
Y774 | 3
T879 | 4
T654 | 3
T474 | 0
Y432 | -1

I need the output like this

C-1|C-2|C-3|C-4
3 |7 |3/10|7/10

Column-1 (Count of rows where Column-B = -1)
Column-2 (Count of rows where Column-B in(0,1,2,3,4)
Column-3 (Column-1/Total rows)
Column-4 (Column-2/Total rows)

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PL/SQL :: Index Not Being Used In Group By

Sep 14, 2012

Here is the scenario with examples. Big table 333 to 500 million rows in the table. Statistics are gathered. Histograms are there. Index is not being used though. Why?

CREATE TABLE "XXFOCUS"."some_huge_data_table"
   ( "ORG_ID" NUMBER NOT NULL ENABLE,
"PARTNERID" VARCHAR2(30) NOT NULL ENABLE,
"EDI_END_DATE" DATE NOT NULL ENABLE,
"CUSTOMER_ITEM_NUMBER" VARCHAR2(50) NOT NULL ENABLE,
"STORE_NUMBER" VARCHAR2(10) NOT NULL ENABLE,
"EDI_START_DATE" DATE,

[Code]...

Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> SELECT num_rows FROM user_tables s WHERE s.table_name = 'some_huge_data_table';

NUM_ROWS
----------
333338434

SQL> SELECT MAX(edi_end_date)
2    FROM some_huge_data_table p
3   WHERE p.org_id = some_number
4     AND p.partnerid = 'some_string';

MAX(EDI_E
---------
13-MAY-12

Elapsed: 00:00:00.00

SQL> explain plan for

2 SELECT MAX(edi_end_date)
3    FROM some_huge_data_table p
4   WHERE p.org_id = some_number
5     AND p.partnerid = 'some_string';

Explained.

SQL> /

PLAN_TABLE_OUTPUT
----------------------------------------------------------------------------------------------------
Plan hash value: 2104157595
--------------------------------------------------------------------------------------------
| Id | Operation                    | Name        | Rows | Bytes | Cost (%CPU)| Time     |
--------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT             |             |     1 |    22 |     4   (0)| 00:00:01 |
|   1 | SORT AGGREGATE              |             |     1 |    22 |            |          |
|   2 |   FIRST ROW                  |             |     1 |    22 |     4   (0)| 00:00:01 |
|* 3 |    INDEX RANGE SCAN (MIN/MAX)| some_huge_data_table_PK |     1 |    22 |     4   (0)| 00:00:01 |
--------------------------------------------------------------------------------------------

SQL> explain plan for

2 SELECT MAX(edi_end_date),
3         org_id,
4         partnerid
5    FROM some_huge_data_table
6   GROUP BY org_id,
7            partnerid;

Explained.

PLAN_TABLE_OUTPUT
----------------------------------------------------------------------------------------------------
Plan hash value: 3950336305
-------------------------------------------------------------------------------
| Id | Operation          | Name     | Rows | Bytes | Cost (%CPU)| Time     |
-------------------------------------------------------------------------------
|   0 | SELECT STATEMENT   |          |     2 |    44 | 1605K (1)| 05:21:03 |
|   1 | HASH GROUP BY     |          |     2 |    44 | 1605K (1)| 05:21:03 |
|   2 |   TABLE ACCESS FULL| some_huge_data_table |   333M| 6993M| 1592K (1)| 05:18:33 |
-------------------------------------------------------------------------------

Why wouldn't it use the index in the group by? If I write a loop to query for different partnerid (there are only three), the whole things takes less than a second.

btw, I gave the index hint too. Didn't work. Version mentioned in the example.

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PL/SQL :: Partition By Group?

Sep 14, 2012

below is the create and insert script.

create table sal_group (g_id number(10),sal_rand number(20));
/
INSERT INTO sal_group values(1,5000)
/
INSERT INTO sal_group values(1,2000)
/
INSERT INTO sal_group values(1,4000)

[code]...

/I have tried

SELECT g_id,sal_rand,
case when row_number() over (order by g_id) = count(*) over () then 'yes' else null end as row_check
FROM sal_group output:

G_ID    SAL_RAND    ROW_CHECK

1       4000
1       2000

[code]....

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PL/SQL :: Way To Avoid (group By)

May 14, 2013

select T2.name,sum(T1.area)
from (select * from country) T1,T2i wrote very simple just to show you the problem, bu i think here we should add "group by".
but is there any way to avoid group by?because i don't want to group any thing!

oracle11g

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