Union query optimalization

Help me please. I have this query with a Union
select p.cdpwet, p.jaar, p.vnrproc
from abgrp p,tbsltbetro bbt
where p.vnrbslt = bbt.vnrbslt
and bbt.cdsrt like :n_rol
and bbt.nrbetr in (select i.nrbetr from tuser i
where i.naam like :n_naam
and (i.cdsrtrpers like :n_cdsrtrpers
or :n_cdsrtrpers is null)
and :n_nrbetr is null
and i.indsrtpers = 'R'
union
select to_number(:n_nrbetr)
from dual
where :n_nrbetr is not null)
I will the same result but without a Union.
Regards,
Patrick

Hi Patric,
probably if you dont want to display UNIQUE values and you are sure that both parts of your query will give different o/p and you just want to club them.. Use UNION ALL.. Your performance problem will be solved, especially when the data fetched is large. Union finds the two data sets and try to sort them to display UNIQUE records only where as UNION ALL just merges them so saving time on sorting.
Hope that this will help you.
Regards
Santa

Similar Messages

How to get Average of a column in UNION query

Hi All,
I will try to explain the issue as much as I can and If you need clarification on any piece please let me know.
So, I have a Union Query with two sets of Criteria.
The first Criteria Brings the list of Buildings and a set of Measures for it. The second criteria does the same but with a different set of filters.
No I use a UNION between these both criteria and present them in a Pivot view so that we only have one row per each building. The values in each of the criteria in the UNION query are Summed
Ex:
Building
Metric 1
Metric 2
1
20
30
1
25
35
2
40
50
2
45
55
So as I show in the pivot the result is
Building
Metric 1
Metric 2
1
45
65
2
85
105
Now the issue is with the Grand Total.
I want the Grand Total to be an Average of the Buildings. So for Metric 1 The Grand Total should be (45+85)/2 because we have two buildings so the answer should be 65.
How can I get that.
Bottom Line: Need an Average as the Grand Total when the Aggregation rule on the column is set to Sum.
we use 11.1.6.10 version

Hi VJ
What you are asking is impossible in the pivot table itself as you are asking one part of the pivot table to aggregate via one method, and another to aggregate via another method, on the same column ..
It can be done using a calculated item. For your example above you'd use the formula ( $1 + $2) / 2.
.. But thats HIGHLY explicit, and would only work if you KNOW how many buildings will come back in the query.. EVERYTIME.
Why not restructure the query to combine it into a single query using an combinations of filters with OR in between?

Sum of columns in union query

hi, i am using oracle 10g database..
how to get the sum of column in union query ?
     select * from (select 100 records from dual), (select 50 available from dual)
union
select * from (select 200 records from dual), (select 150 available from dual)
display should be like
                 records         available
                  100               50
                  200               150
total            300               200thanks ...

Peter vd Zwan wrote:
try this:Grouping by records will not produce correct results:
SQL> with a as
2 (
3 select * from (select 100 records from dual), (select 50 available from dual)
4 union
5 select * from (select 100 records from dual), (select 100 available from dual)
6 union
7 select * from (select 200 records from dual), (select 150 available from dual)
8 )
9 select
10    case when grouping(records) = 0 then null else 'total' end tot
11    ,sum(records)   records
12    ,sum(available) available
13 from
14    a
15 group by
16 rollup (records)
17 ;
TOT      RECORDS AVAILABLE
             200        150
             200        150
total        400        300
SQL> select case grouping(rownum)
2     when 1 then 'Total'
3   end display,
4          sum(records) records,
5          sum(available) available
6    from (
7            select * from (select 100 records from dual), (select 50 available from dual)
8           union
9            select * from (select 100 records from dual), (select 100 available from dual)
10           union
11            select * from (select 200 records from dual), (select 150 available from dual)
12          )
13    group by rollup(rownum)
14 /
DISPL    RECORDS AVAILABLE
             100         50
             100        100
             200        150
Total        400        300
SQL> SY.

Parameter in union query

Hi Guys,
I want to know how to create parameter in case of union query in 8.8. with new token option.
Thanks Rashid

Hi Rashid,
It seems you are asking question regarding Crystal Report. Is that true?
Thanks,
Gordon

View using Union Query

All,
How to create a view using a union query in sql developer. I tried doing but when i check the syntax I got an error
"The SQL syntax is valid, however the query is invalid or uses functionality that is not supported.
Declarative query support does not currently include UNION, INTERSECT or MINUS"
Could some one help me out
Regards

792011 wrote:
All,
How to create a view using a union query in sql developer. I tried doing but when i check the syntax I got an error
"The SQL syntax is valid, however the query is invalid or uses functionality that is not supported.
Declarative query support does not currently include UNION, INTERSECT or MINUS"
Could some one help me outuse different/upgraded client since UNION is valid SQL

Prompts for Combine similar request (Union query)

I have been given 5 tables for creating one report out of each table. I created aliases and
necessary self joins. I now need a summaryreport that combines these five tables. I tried the
"combine similar request" and the report functions fine. Now I have to create two prompts, one for
country and one for job. These are fields available in 4 tables and have the same format alongwith
the same datatypes. Please help me with this.
Table 1 Report A
Table 2 Report B
Table 3 Report C
Table 4 Report D
Table 5 Report E
Table 1 - Table 4 contains Country and Job field which is of the same format and datatype.
Table 5 does not have these and its not necessary for us to prompt this.
This has no star schema setup and I am not in a position to get it done as well. I considered each
table to be a fact table and created aliases, selfjoins etc. Please help with the procedure to
create the two dashboard prompts. If I choose USA then the first four amongst the union queries
should reflect data for the USA. The same applies for Job.

Hello
Thanks for the reply.
My problem here is that I have 5 different tables with country fields in them. They are of the same format and datatype but there is no join between these tables. If I choose one Country field from any particular table, then the combine similar request doesnt seem to take it for other queries where the fields come from a different table.
eg.
Table 1 - table 5 have country fields
I choose to create a prompt based on Country from Table 1. The union query doesnt seem to reflect on filtering values on the queries from other tables. It would filter only the values from table 1.
Please let me know as to what can be done!

Alternative/enhancement to union query? Duplicate - please delete

Hello,
I have 2 sets of similar data which I am joining together with a union query.
Simplified E.g.
*Table A*
Name Dept
Ben    1
Amy   3
Ken    3
*Table B*
Name Dept
Jim    1
John 2
Sue   3
select Name, Dept
from table A
UNION
select Name, Dept
from table BWhat I would like to do is ONLY include data from the second part of the union query where it joins with some data from the first part of the union query.
E.g.
select Name, Dept
from table A
UNION
select Name, Dept
from table B
where Dept in (select distinct Dept from A)Therefore John that works in Dept 2 would not be included in the results.
Is there a better or more efficient way of doing this than my example using the subquery as part of the where clause?
Many thanks,
Hazel
Edited by: user11979866 on 04-Nov-2010 08:48

Hazel:
It would really depend on the sizes of the tables and the indexes available, but that is probably the way I would write it, at least as a first cut.
You could lose the distinct in the in sub-query since it is implied by the in itself, and Oracle will only return one row from the sub-query for each value of dept in A.
John

Alternative/enhancement to union query?

Hello,
I have 2 sets of similar data which I am joining together with a union query.
Simplified E.g.
*Table A*
Name Dept
Ben    1
Amy   3
Ken    3
*Table B*
Name Dept
Jim    1
John 2
Sue   3
select Name, Dept
from table A
UNION
select Name, Dept
from table BWhat I would like to do is ONLY include data from the second part of the union query where it joins with some data from the first part of the union query.
E.g.
select Name, Dept
from table A
UNION
select Name, Dept
from table B
where Dept in (select distinct Dept from A)Therefore John that works in Dept 2 would not be included in the results.
Is there a better or more efficient way of doing this than my example using the subquery as part of the where clause?
Many thanks,
Hazel

Hi, Hazel,
What you posted is as good as you can get without changing the tables.
You don't have to say DISTINCT in the IN-subquery:
where   Dept in ( select Dept
                   from    A
                )will get the same results, perhaps a little faster.

Customised sub-total via UNION query - how to exclude from totals?

Hi,
I have a client requirement that a couple of companies have their own sub-total in a report, a treatment which applies to no other companies in their group.
I have achieved this via a union all, but they also want a total of companies.
Is there anyway to emulate a Grand Total, other than another union query such that the double count is not double counted?
thanks for any ideas.
Robert.

only solution which i can think of is to create another union request for the grand total.. this way you wont add up your sub totals twice..

How do I make a 'union' query?

Hi,
How do I make a union query in JDev? Something like this.
select 'x' from dual
union
select 'y' from dual;
to get a rowsetinfo for showing in a combobox control? Don't ask
me to create view in the database:-). It may not be practical for
all such adhoc queries.
--Gopal
null

Hi
Sorry for that one. I didn't do my rtfm before asking that. There
is a constructor for QueryInfo which takes any sql statement.
--Gopal
Gopal (guest) wrote:
: Hi,
: How do I make a union query in JDev? Something like this.
: select 'x' from dual
: union
: select 'y' from dual;
: to get a rowsetinfo for showing in a combobox control? Don't
ask
: me to create view in the database:-). It may not be practical
for
: all such adhoc queries.
: --Gopal
null

Create a Union query that automatically adds/contains new tables with a similar name

Dear All,
For a research project i am upscaling from an Access database to SQL server/ SQL azure since the database got far too large. Now i am quite well known with Access, but to be quite honest, I am a SQL rookey. So a lot to learn for me here.
what I need is a union query that automatically adds new research dumps to the query. All research dumps have a table name starting with TD_EXP (Table Dump _ Export). In Access VBA I simply made a loop that builds up the SQL statement, but i have no clue
how to do this within SQL Server...
So, I need the UNION Query to select * from TD_Exp_2012_06_06_15_48 UNON all the TD_Exp_XXXX_XX_XX_XX_XX that are added in the database,
Who could help me out please with a dynamic SQL statement.
Best regards Jurjen

you can use INFORMATION_SCHEMA.TABLES view for that
do like below
DECLARE @Query varchar(max)
SELECT @Query = STUFF((SELECT ' UNION ALL ' + 'SELECT * FROM ' + TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME LIKE 'TD_EXP%' FOR XML PATH('')),1,11,'')
SELECT @Query
Add one more condition as below if you want to exclude views from above
DECLARE @Query varchar(max)
SELECT @Query = STUFF((SELECT ' UNION ALL ' + 'SELECT * FROM ' + TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME LIKE 'TD_EXP%' AND TABLE_TYPE = 'BASE TABLE' FOR XML PATH('')),1,11,'')
SELECT @Query
Please Mark This As Answer if it helps to solve the issue Visakh ---------------------------- http://visakhm.blogspot.com/ https://www.facebook.com/VmBlogs

Trying to narrow down a UNIONed query

I've compared 2 tables using MINUS. There should have been no difference. Since there was, I used UNION to display the corresponding rows between both tables. Now, in my result set, I have to search through many rows that don't have correspondents to find rows that do.
Basically how do I narrow the UNION query down so that only the corresponding pair rows that have differences in their columns show up? I'm trying to use the primary key which is a combination of the first 5 columns. My query looks like this:
select
TRADE_DATE, ORDER_ROUTE_UID, ORDER_ENTRY_DATE, LEG_NBR, GROUP_SEQ_NBR,
AFFL_FIRM_GROUP_ID, REC_CREAT_DATE
from ors_firm_affl_hist@MSS_JOBS_HISTP01_LINK01.WORLD
union
select
TRADE_DATE, ORDER_ROUTE_UID, ORDER_ENTRY_DATE, LEG_NBR, GROUP_SEQ_NBR,
AFFL_FIRM_GROUP_ID, REC_CREAT_DATE
from ors_firm_affl_hist;
How can I use TRADE_DATE, ORDER_ROUTE_UID, ORDER_ENTRY_DATE, LEG_NBR, GROUP_SEQ_NBR in order to have the query display only the rows that have correspondents in the other table as opposed to rows that just aren't in either table?

Not sure if this meets your requirements;
SQL> with t1 as (
   select 'jon' first_name, 'smith' last_name, 'j' middle_init from dual union all
   select 'tom', 'a', 'a' from dual union all
   select 'bob', 's', 's' from dual union all
   select 'Stan', 'm', 'l' from dual union all
   select 'Kyle', 'b', 'r' from dual union all
   select 'Kenny', 'm', 'r' from dual union all
   select 'Eric', 'c', 'c' from dual),
     t2 as (
   select 'jon' first_name, 'smith' last_name, 'p' middle_init from dual union all
   select 'tom', 'a', 'l' from dual union all
   select 'bob', 's', 'j' from dual union all
   select 'Stan', 'm', 'l' from dual union all
   select 'Kyle', 'b', 'r' from dual union all
   select 'Kenny', 'm', 'r' from dual union all
   select 'Eric', 'c', 'c' from dual)
   select 'T1' source, first_name, last_name, middle_init from t1
   minus
   select 'T1' source, first_name, last_name, middle_init from t2
union all
   select 'T2' source, first_name, last_name, middle_init from t2
   minus
   select 'T2' source, first_name, last_name, middle_init from t1
order by 2,3,1
SO FIRST LAST_ M
T1 bob   s     s
T2 bob   s     j
T1 jon   smith j
T2 jon   smith p
T1 tom   a     a
T2 tom   a     l
6 rows selected.

Can we change filter column values in a union query using Dashboard prompt

Hi,
I have a requirement in which have to draw a chart report for last six months?.
When i query against database, my query got different where clause for open month and close month.
Say for july month bar, it got close month as july and open month as july, june, may. Like this, for june month bar, it has to have close month as june and open month as june, may, april. like this, i created six union queries using repository variable.
Want to give control using dashboard prompt for close month and open month?
my query look like this.
select close month1, fact1 from table1
where close month = july and open month in (july, june, may)
UNION
select close month2, fact2 from table1
where close month = june and open month in (june, may, april)
UNION
select close month3, fact3 from table1
where close month = may and open month in (may, april, march)
UNION
select close month4, fact4 from table1
where close month = april and open month in (april, march, february)
UNION
select close month5, fact5 from table1
where close month = march and open month in (march, february, january)
UNION
select close month6, fact6 from table1
where close month = february and open month in (february, january, december)
Welcome your suggestions on this?.
Thanks

Hi Karol,
Yes the prompt is working fine when i put this following method under the "Button" Component.
APPLICATION.openPromptDialog(800, 600);
Somehow the when i use the "Input Field" and use the "Button" Component and write this following logic inside it i don't see the prompt is not taking the values what i am entering in input field i assume that its issue with data-source not getting refreshed.
Variable=INPUTFIELD_1.getValue();
APPLICATION.setVariableValue("PercentageIncrease",Variable);
Thanks,
Kumar

Discoverer Date Range Union Query

Hi All,
I need your help in creating a discovere report in version 11G.
Following Report find missing elimination account based on Transaction done in a date Range. Find out how many accounts are not defined in Elimination Account Setup. Following query gives me desired output but i am having hard time creating a discoverer report for Date Range Parameter as Date Range only applied to one side of union.
In First Query i used decode with sysdate itself so that i can use effective_date as parameter and second side i just kept sysdate.
PLease let me know how can i create a parameterized report for effective_date range.
SELECT
    /*+ ORDERED
    USE_NL(jel jeh jeb cat src)
    INDEX(jel GL_JE_LINES_N1)
    INDEX(jeh GL_JE_HEADERS_U1)
    INDEX(jeb GL_JE_BATCHES_U1)
    INDEX(cat GL_JE_CATEGORIES_TL_U1)
    INDEX(src GL_JE_SOURCES_TL_U1) */
    CC.SEGMENT1
    ||'.'
    ||CC.segment2
    ||'.'
    ||CC.segment3
    ||'.'
    ||cc.segment4
    ||'.'
    || cc.segment5
    ||'.'
    || cc.segment6 Account,
    decode(sysdate,sysdate,sysdate,jel.effective_date) trx_date
FROM gl_code_combinations cc,
    gl_je_lines jel,
    gl_je_headers jeh,
    gl_je_batches jeb,
    gl_je_categories cat,
    gl_je_sources src
WHERE cc.CHART_OF_ACCOUNTS_ID = 50308
AND cc.segment2              IN ('111710','201910')
AND jel.code_combination_id   = cc.code_combination_id
AND jel.status
    || ''                = 'P'
AND (jel.accounted_cr != 0
OR jel.accounted_dr   != 0)
AND jeh.je_header_id   = jel.je_header_id
AND jeh.actual_flag    = 'A'
AND jeh.currency_code       != 'STAT'
AND jeb.je_batch_id          = jeh.je_batch_id
AND jeb.average_journal_flag = 'N'
AND src.je_source_name       = jeh.je_source
AND cat.je_category_name     = jeh.je_category
and jel.effective_date between to_date('01-JAN-2011','DD-MON-RRRR') and to_date('31-MAY-2011','DD-MON-RRRR')
MINUS
SELECT (source_segment1
    ||'.'
    ||source_segment2
    ||'.'
    ||source_segment3
    ||'.'
    ||source_segment4
    ||'.'
    ||source_segment5
    ||'.'
    ||source_segment6) def_acnt,
    sysdate
FROM GL_ELIM_ACCOUNTS_MAP

Hi,
You can use the following SQL to get the effective date into the SQL and by that create the condition in the report:
SELECT
CC.SEGMENT1
||'.'
||CC.segment2
||'.'
||CC.segment3
||'.'
||cc.segment4
||'.'
|| cc.segment5
||'.'
|| cc.segment6 Account,
decode(sysdate,sysdate,sysdate,jel.effective_date) trx_date,
jel.effective_date
FROM gl_code_combinations cc,
gl_je_lines jel,
gl_je_headers jeh,
gl_je_batches jeb,
gl_je_categories cat,
gl_je_sources src
WHERE cc.CHART_OF_ACCOUNTS_ID = 50308
AND cc.segment2 IN ('111710','201910')
AND jel.code_combination_id = cc.code_combination_id
AND jel.status
|| '' = 'P'
AND (jel.accounted_cr != 0
OR jel.accounted_dr != 0)
AND jeh.je_header_id = jel.je_header_id
AND jeh.actual_flag = 'A'
AND jeh.currency_code != 'STAT'
AND jeb.je_batch_id = jeh.je_batch_id
AND jeb.average_journal_flag = 'N'
AND src.je_source_name = jeh.je_source
AND cat.je_category_name = jeh.je_category
AND NOT EXISTS (
SELECT 1
FROM GL_ELIM_ACCOUNTS_MAP
WHERE CC.SEGMENT1 = source_segment1
AND CC.segment2 = source_segment2
AND CC.segment3 = source_segment3
AND cc.segment4 = source_segment4
AND cc.segment5 = source_segment5
AND cc.segment6 = source_segment6
AND decode(sysdate,sysdate,sysdate,jel.effective_date) = SYSDATE
*** I removed the hints, but if you need those get them back
*** BTW i didn't understand the logic behind the "decode(sysdate,sysdate,sysdate,jel.effective_date)" wouldn't it always be SYSDATE???
Tamir

PL/SQL Cartridge with Union Query

I have a pl/sql cartridge, with 3 select queries connected to each other by a "union". These queries basically generate a report from two tables. One of those queries is based on Table 1, and the other two are based on Table 2. What I need to accomplish is that I want to add a condition that restricts the outcome of the query (all three unions as a whole) based on a condition. Say, the condition is table1.param1 = '1'. Now, I'm getting confused with incorporating this condition in query 2 and query 3 which are based on table 2, and don't have the param1. However, both table1 and table 2 have param2 in common. I tried writing something like: (this is just a skeleton of my code)
SELECT param1, PARAM2, OTHER_PARAM
FROM table1
where param1 = '1'
union
select param2, param3, 0 other_param
from table2
where param2 in
(select param2
from table1
where param1 = '1')
union
select param2, param4, param5 other_param
from table2
where param2 in
(select param2
from table1
where param1 = '1');but this doesn't work. Can anyone help me with this query? any help is appreciated.

I think it will help you guys better if I illustrate in more detail. Posting my code below. p1,p2,p3..etc are parameter names. Hope someone will be able to help now.
The original code, before adding the new condition is:
select p1_num,
          p2_date,
          sum(decode(p3,'50',p4,0)) b_amt,
          sum(decode(p3,'10',p4,0)) r_amt,
          sum(decode(p3,'20',p4,0)) d_amt,
          sum(decode(p3,'40',p4,0)) l_amt,
          0 pay_amt,
          0 o_amt,
          0 g_amt,
          0 ot_amt
   FROM table1 t1
   where p1_num = passed_parameter -- Parameter passed to the cursor
         AND to_char(p2_date, 'mmyyyy') = V_pdate -- V_pdate is a parameter passed to the procedure
         group by p1_num, p2_date
   UNION
   select p1_num,
          p6_date,
          0,
          0,
          0,
          0,
          sum(decode(p7,'2', p8,0)) pay_amt,
          0 o_amt,
          0 g_amt,
          0 ot_amt
   from table2 t2
   where p1_num = passed_parameter -- Parameter passed to the cursor
          AND to_char(p6_date, 'mmyyyy') = V_pdate -- V_pdate is a parameter passed to the procedure
          group by p1_num, p6_date
   UNION
   select p1_num,
          p6_date,
          0,
          0,
          0,
          0,
          0 pay_amt,
          sum(decode(substr(p9,1,1),'1',p8,0)) oil_amt,
          sum(decode(substr(p9,1,1),'2',p8,0)) gas_amt,
          sum(decode(substr(p9,1,1),'5',p8,'3',p8,'4',p8,0)) ot_amt
   from table2 t2
   where ((p7 IS NULL) OR (p7 IN ('0','1','3','4')))
         and p1_num = passed_parameter -- Parameter passed to the cursor
         AND to_char(p6_date, 'mmyyyy') = V_pdate -- V_pdate is a parameter passed to the procedure
         group by p1_num, p6_date;
         I need to add a condition <b>p5 = '1'</b> to filter the results of this query. p5 is a from table1. I tried using inner join, as per Jane's suggestion, something like this:
select t1.p1_num,
          t1.p2_date,
           sum(decode(p3,'50',p4,0)) b_amt,
          sum(decode(p3,'10',p4,0)) r_amt,
          sum(decode(p3,'20',p4,0)) d_amt,
          sum(decode(p3,'40',p4,0)) l_amt,
           sum(decode(p7,'2', p8,0)) pay_amt,
          sum(decode(substr(p9,1,1),'1',p8,0)) oil_amt,
          sum(decode(substr(p9,1,1),'2',p8,0)) gas_amt,
          sum(decode(substr(p9,1,1),'5',p8,'3',p8,'4',p8,0)) ot_amt
   FROM table2 t2 inner join table1 t1
   on t2.p1_num = t1.p1_num
   WHERE
   to_char(t1.p6_date,'mmyyyy') = V_pdate
   and   t1.p5 = '1'
   and ((t2.p7 IS NULL) OR (t2.p7 IN ('0','1','3','4')))
   group by t1.p1_num, t1.p2_date
   order by t1.p1_num
   Firstly, I get duplicates for some of the records, which I need to eliminate. Once I eliminate those, i'll know if my retrieved records are right (since right now its retrieving more than 1000 records!)

Union query optimalization

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