Alternative to the union in Oracle 10 g
Here's the sql code using the union that I currently use. There are 64 columns of 3 different tables. Out of all the columns that a single column value is a constant for 2 discs.Select col1, col2, col3,..., 'TO' medium_val
of table1, table2, table3
where table1.col1 = table2.col1
and table2.col1 = table3.col1
and other criteria
Union
Select col1, col2, col3,..., 'GT' medium_val
of table1, table2, table3
where table1.col1 = table2.col1
and table2.col1 = table3.col1
and other criteria
Basically repeating the same code just for the value of a column. Is there any alternative to the union in order to avoid the questioning of two times the same tables.
Hello
Here's one way that will work in Oracle 9 (or higher):
WITH all_medium_vals AS
(
SELECT 'DE' AS medium_val FROM dual UNION ALL
SELECT 'WG' FROM dual
)
SELECT col1, col2, col3, ....
, m.medium_val
FROM table1
, table2
, table3
, all_medium_vals m
WHERE table1.col1 = table2.col1
AND table2.col1 = table3.col1
AND ...
;
Do not refer to m.medium_val in the WHERE clause. Leaving him out, you'll do a cross join of your result set of table1, table2, and table3 with 2 lines in all_medium_vals.
Starting Oracle 11, there are also SOME... UNPIVOT.
You will notice that this query is still a UNION, but it's just the UNION of two lines and then by doing the complicated only one query. That will be much more effective that make the complex query twice, and then make a UNION of however many lines that happened to produce. There are ways to generate all_medium_vals without a UNION, but they are not as easy to understand or to debug and are not significantly more effective.
Tags: Database
Similar Questions
-
Please help me with the Alternative of queries to replace the UNION ALL for two queries
Hi all
I have the query to retrieve assets employees salary count and in so far as below:
Select ename, emp_no, sum (sal_till_2010), sum (sal_till_2014) of
(select emp_no, ename, salary as sal_till_2010, 0 as sal_till_2014 of employee e1
where effective_date < = 1 January 2010 ' and not exists (select 1 from e2 employee_deletion where e2.emp_no = e1.emp_no and e2.deletion_date < = January 1, 2010 "")
UNION ALL
Select ename, emp_no, 0 as sal_till_2010, salary as employee e1 sal_till_2014 - here is a dummy 0 salary until 2010 for the union of all the
where effective_date < = 1 January 2014 "and not exists (select 1 from e2 employee_deletion where e2.emp_no = e1.emp_no and e2.deletion_date < = 1 January 2014") "
Group of emp_no, ename;
In this query, I get the total salary until 2010 and until 2014 in the employee table, dates are dynamically passed to the procedure, and this can change.
But assume the date above and let me know the alternative of queries to improve performance because I use Union ALL and read the same table twice in the above query.
Advice me with request to read the table once to fetch the same data as the above query.
Thanks in advance.
Hello
Thanks for the display of the data of the sample; It's very useful!
I think OP wants something like this:
WITH cutoff_dates AS
(
SELECT TO_DATE (January 1, 2010 ', ' DD/MM/YYYY') AS cutoff_date, 2010 UNDER the label OF dual UNION ALL
SELECT TO_DATE (1 January 2014 ', "DD/MM/YYYY"), double 2014
)
SELECT e.emp_no, e.ename
, NVL (SUM (CASE WHEN c.label = 2010 THEN e.salary END), 0) AS sal_till_2010
, NVL (SUM (CASE WHEN c.label = 2014 THEN e.salary END), 0) AS sal_till_2014
E employee
JOIN cutoff_dates c ON e.effective_date<=>
WHERE DOES NOT EXIST)
SELECT 1
Of employee_deletion ed
WHERE ed.emp_no = e.emp_no
AND ed.deletion_date<=>
)
E.emp_no GROUP, e.ename
ORDER BY e.emp_no
;
Output of your sample data:
EMP_NO ENAME SAL_TILL_2010 SAL_TILL_2014
---------- ------ ------------- -------------
1 Mickey 450 0
2 Donald 750 0
-
Oracle dynamic SQL with the UNION operator
Hello
I have sql string contains two queries separated by the UNION operator. When I run by using DBMS_SQL, it becomes only the first SQL before the UNION operator.
Can anyone correct how can I Sue UNION in DBMS_SQL?
Thank youSorry,
I tested my code
BEGIN FOR I IN (SELECT 1 A FROM DUAL UNION SELECT 2 A FROM DUAL UNION SELECT 3 A FROM DUAL) LOOP DBMS_OUTPUT.PUT_LINE(I.A); END LOOP; END;and copy this code and PASE to DBMS_SQL. PARSE (all other cases, "... and insert the INSERT STATEMENT but does not erase DBMS_OUTPUT.")
Edited by: Quluzade Mr. Mahir on February 28, 2011 12:18
-
Alternative and improvement of the union query?
Hello
I have 2 sets of similar data together with a union query.
Simplified example
I want to do is to ONLY include data from the second part of the union query, where it is associated with the first part of the union query data.*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 B
For example
That's why John, who works in the Dept 2 would not be included in the results.select Name, Dept from table A UNION select Name, Dept from table B where Dept in (select distinct Dept from A)
Is there a better or more effective way to achieve that my example using the subquery in the where clause?
Thank you very much
HazelHi, Hazel,
What you posted is as good as you can get without changing tables.
Do not say SEPARATE in the IN-under-query:
... where Dept in ( select Dept from A )will get the same results, maybe a little faster.
-
I'm trying to get this result,
EQPID EVENTVAL 20120501 20120502 20120503 201204 201205
-------------------------------------------------------------------------------------------------------------------
MS - A1 21528 28386 18288 821295 908602 TKINQTY
MS - A1 21510 28359 18270 820470 907321 TKOUTQTY
MS - B1 21090 17990 15750 467922 557239 TKINQTY
MS - B1 21080 17982 15735 467495 556730 TKOUTQTY
MS - C1 35548 23848 26082 914351 1013655 TKINQTY
MS - C1 35533 23826 26058 913727 1012888 TKOUTQTY
MS - D1 22680 17568 15030 514467 494510 TKINQTY
MS - D1 22660 17565 15021 513955 493857 TKOUTQTY
MS - E1 18450 20916 20754 429057 490732 TKINQTY
MS - E1 18436 20912 20739 428564 490188 TKOUTQTY
MS - F1 13968 14436 14670 440760 517343 TKINQTY
MS - F1 13949 14409 14657 440364 516870 TKOUTQTY
MS - G1 21060 21600 25240 573409 460286 TKINQTY
MS - G1 21057 21595 25237 573317 459888 TKOUTQTY
MS - H1 16452 19278 21456 510192 545201 TKINQTY
MS - H1 16452 19278 21456 510174 545174 TKOUTQTY
170776 164022 157270 4671453 4987568 TKINQTY
170677 163926 157173 4668066 4982916 TKOUTQTY
341453 327948 314443 9339519 9970484
in this table
CUTOFF_DATE EQPID TKINQTY TKOUTQTY
-------------------------------------------------------------------------
20120401 MS - A1 46566 46524
20120401 MS - B1 13734 13720
and so on...
Here is my code,
SELECT EQPID, «EVENTVAL' AS «EVENTVAL', SUM("20120501") AS '20120501', SUM("20120502") AS '20120502', SUM("20120503") AS '20120503', SUM("201204") "201204" AS, SUM("201205") "201205" AS
Of
(
SELECT EQPID, «EVENTVAL' AS «EVENTVAL', SUM("20120501") AS '20120501', SUM("20120502") AS '20120502', SUM("20120503") AS '20120503', SUM("201204") "201204" AS, SUM("201205") "201205" AS
Of
(
SELECT EQPID,
CASE
WHEN EQPID LIKE 'MS-% '.
THEN "TKINQTY".
END, LIKE "EVENTVAL."
CASE
WHEN CUTOFF_DATE = '20120501'
THEN SUM (QTY)
END, LIKE "20120501."
CASE
WHEN CUTOFF_DATE = '20120502'
THEN SUM (QTY)
END, LIKE "20120502."
CASE
WHEN CUTOFF_DATE = '20120503'
THEN SUM (QTY)
END, LIKE "20120503."
CASE
WHEN CUTOFF_DATE BETWEEN '20120401' AND '20120430'
THEN SUM (QTY)
END AS "201204."
CASE
WHEN CUTOFF_DATE BETWEEN '20120501' AND '20120530'
THEN SUM (QTY)
END AS "201205.
Of
(
SELECT CUTOFF_DATE, EQPID, SUM (TKINQTY) QTY.
OF DAILY_DATA
WHERE CUTOFF_DATE BETWEEN '20120401' AND '20120530'
AND EQPID LIKE 'MS-%'
CUTOFF_DATE GROUP, EQPID
ORDER BY CUTOFF_DATE, EQPID
)
EQPID GROUP, CUTOFF_DATE
)
EVENTVAL GROUP, EQPID
UNION
SELECT EQPID, 'EVENTVAL' AS 'EVENTVAL', SUM("20120501") AS '20120501', SUM("20120502") AS '20120502', SUM("20120503") AS "20120503", SUM("201204") AS "201204', SUM("201205") AS"201205 '"
Of
(
SELECT EQPID,
CASE
WHEN EQPID LIKE 'MS-% '.
THEN "TKOUTQTY".
END, LIKE "EVENTVAL."
CASE
WHEN CUTOFF_DATE = '20120501'
THEN SUM (QTYO)
END, LIKE "20120501."
CASE
WHEN CUTOFF_DATE = '20120502'
THEN SUM (QTYO)
END, LIKE "20120502."
CASE
WHEN CUTOFF_DATE = '20120503'
THEN SUM (QTYO)
END, LIKE "20120503."
CASE
WHEN CUTOFF_DATE BETWEEN '20120401' AND '20120430'
THEN SUM (QTYO)
END AS "201204."
CASE
WHEN CUTOFF_DATE BETWEEN '20120501' AND '20120530'
THEN SUM (QTYO)
END AS "201205.
Of
(
SELECT CUTOFF_DATE, EQPID, SUM (TKOUTQTY) QTYO
OF DAILY_DATA
WHERE CUTOFF_DATE BETWEEN '20120401' AND '20120530'
AND EQPID LIKE 'MS-%'
CUTOFF_DATE GROUP, EQPID
ORDER BY CUTOFF_DATE, EQPID
)
EQPID GROUP, CUTOFF_DATE
)
EVENTVAL GROUP, EQPID
)
GROUP BY ROLLUP (EVENTVAL, EQPID)
ORDER OF EQPID, EVENTVAL
It seems to be so long, and I try to avoid the UNION...
Is there an alternative way to achieve the same result without the help of the union?
Thank you
Estelle =)
Published by: 1004902 on May 8, 2013 17:52
Published by: 1004902 on May 8, 2013 17:59Hello
Welcome to the forum!
1004902 wrote:
I'm trying to get this result,EQPID EVENTVAL 20120501 20120502 20120503 201204 201205
-------------------------------------------------------------------------------------------------------------------
MS - A1 21528 28386 18288 821295 908602 TKINQTY
MS - A1 21510 28359 18270 820470 907321 TKOUTQTY
...
in this tableCUTOFF_DATE EQPID TKINQTY TKOUTQTY
-------------------------------------------------------------------------
20120401 MS - A1 46566 46524
20120401 MS - B1 13734 13720
and so on...Every time you ave a problem, CREATE TABLE post and instructions INSERT for your sample data and the results you want from this data.
Explain how you get these results from these data.
Always say what Oracle version you have (for example, 11.2.0.2.0).
See the FAQ forum {message identifier: = 9360002}It seems that the UNION may be replaced by a cross join, or SELECT... UNPIVOT depending on what version of Oracle you are running.
Published by: Frank Kulash on May 8, 2013 21:52
You may want something like this:
WITH cntr AS ( SELECT LEVEL AS n FROM dual CONNECT BY LEVEL <= 2 ) , got_eventval AS ( SELECT d.cutoff_date , d.eqpid , CASE WHEN c.n = 1 THEN 'TKINQTY' ELSE 'TKOUTQTY' END AS eventval , CASE WHEN c.n = 1 THEN d.tkinqty ELSE d.tkoutqty END AS qty FROM daily_data d CROSS JOIN cntr c WHERE cutoff_date BETWEEN '20120401' AND '20120530' AND eqpid LIKE 'MS-%' ) SELECT eqpid, eventval , SUM (CASE WHEN cutoff_date = '20120501' THEN qty END) AS "20120501" , SUM (CASE WHEN cutoff_date = '20120502' THEN qty END) AS "20120502" , SUM (CASE WHEN cutoff_date = '20120503' THEN qty END) AS "20120503" , SUM (CASE WHEN cutoff_date LIKE '201204' THEN qty END) AS "201204" , SUM (CASE WHEN cutoff_date LIKE '201205' THEN qty END) AS "201205" FROM got_eventval GROUP BY eqpid, eventval ORDER BY eqpid, eventval ;Of coursel, I can't test it until you post the sample data.
Storage of the information on the dates in a column VARCHAR2 is a very bad idea. The columns DATE to the date information.
-
FILL MONTHS DYNAMICALLY IN THE ITEM VIA ORACLE FORMS GROUP RECORDING LIST
Experts
I have a query in oracle forms. I need to fill Last_Month, Current_Month & Next_month based on Sys_Date in the list box. I am able to get the values in SQL if I run the query below, but when I use the version of Oracle Forms 10.1.2.0.2, I could not get the values of Mr. can you please guide me where I'm wrong.
declare
v_rg_id recordgroup: = NULL;
Number of V_errorcode;
v_rg_salmth varchar2 (30): = "MONTHS";
Begin
v_rg_id: = find_group (v_rg_salmth);
If id_null (v_rg_id) then
v_rg_id: = create_group_from_query (v_rg_salmth,
"WITH (AS MONTH_COUNTER)
SELECT LEVEL 2 AS ID
OF THE DOUBLE
CONNECT BY LEVEL = 2
UNION
SELECT LEVEL AS ID
OF THE DOUBLE
CONNECT BY LEVEL = 0
)
SELECT TO_CHAR (ADD_MONTHS (TO_CHAR (SYSDATE), ID), MONTH) AS MONTH_COUNTER MONTHS ');
v_errorcode: = populate_group (v_rg_id);
If v_errorcode = 0 then
message ("record group filled with data");
on the other
message ("V_errorcode is:" | ") v_errorcode);
end if;
End if;
populate_list('MASTER.) MONTH, v_rg_id);
end;
The rather complicated query, try
SELECT ADD_MONTHS (SYSDATE-1) TO DOUBLE
UNION ALL
SELECT SYSDATE DOUBLE
UNION ALL
SELECT THE DOUBLE ADD_MONTHS(SYSDATE,1)
BTW. to use a query to populate a list, you must select two values, a label and a value, check it fill listitems dynamically - Andreas Weiden - on Oracle
-
Select records of first and the last in the Group results - Oracle 11 g
I have the following information in the Oracle 11 g table:
Qty. Production order Date and time 20 00000000000000001 12 JANUARY 14 00:02 20 00000000000000001 12 JANUARY 14 00:05 20 00000000000000001 12 JANUARY 14 00:07 20 00000000000000001 JANUARY 13, 14 00:09 30 00000000000000002 12 JANUARY 14 00:11 30 00000000000000002 JANUARY 12/14 00:15 30 00000000000000002 12 JANUARY 14 00:20 30 00000000000000002 14 JANUARY 14 00:29 I here to write a query that returns the following:
Qty. Production order First Last 80 00000000000000001 12 JANUARY 14 00:02 JANUARY 13, 14 00:09 120 00000000000000002 12 JANUARY 14 00:11 14 JANUARY 14 00:29 Is the sum of the Qty. grouping column by Production order and the time of the first and last records for each Production order .
I came up with a query that gave this result:
Qty. Production order First Last 80 00000000000000001 12 JANUARY 14 00:02 14 JANUARY 14 00:29 120 00000000000000002 12 JANUARY 14 00:02 14 JANUARY 14 00:29 Wwhich means that the and last columns show the first and last date / time the whole table. Please note that there is a shadow table. Sorry, I am now allowed to write the actual query
, I came with given work policies don't allow me to share. Also, I tried with windowing functions such as rank()and row_number() but my user has not enough privileges to do so.
Help or advice will be greatly appreciated.
Due to the fact that Oracle does not have the lines in a particular order, it would be wrong that the first 'date' would be the first line to be processed by the query.
So, you will need to provide another column if you do not want to look at the table as ordered by date.
Any analytic function must also allows you to provide the 'to' and if that's the date, then just a simple query:
SQL > WITH Tab1 (quantity, Production_Order, patch)
2 ALSO (SELECT 20, '00000000000000001', TO_DATE (12 JANUARY 14 00:02 ', 'DD-MON-YY HH24') FROM DUAL UNION ALL)
20. SELECT 3, '00000000000000001', TO_DATE (12 JANUARY 14 00:05 ', 'DD-MON-YY HH24') FROM DUAL UNION ALL
4. SELECT 20, '00000000000000001', TO_DATE (12 JANUARY 14 00:07 ', 'DD-MON-YY HH24') FROM DUAL UNION ALL
20. SELECT 5, '00000000000000001', TO_DATE (13 JANUARY 14 00:09 ', 'DD-MON-YY HH24') FROM DUAL UNION ALL
6. SELECT 30, '00000000000000002', TO_DATE (12 JANUARY 14 00:11 ', 'DD-MON-YY HH24') FROM DUAL UNION ALL
30 SELECT 7, '00000000000000002', TO_DATE (12 JANUARY 14 00:15 ', 'HH24 LUN-JJ-AA') OF ANY UNION DOUBLE
8. SELECT 30, '00000000000000002', TO_DATE (12 JANUARY 14 00:20 ', 'DD-MON-YY HH24') FROM DUAL UNION ALL
9 SELECT 30, '00000000000000002', TO_DATE (14 JANUARY 14 00:29 ', 'DD-MON-YY HH24') FROM DUAL)
10. SELECT SUM (Qty), Production_Order, MIN (update), MAX (updated)
11 OF Tab1
GROUP of 12 BY Production_Order
13 * ORDER BY Production_Order
SQL > /.
SUM (QTY) PRODUCTION_ORDER (PDATE) MIN MAX (PDATE)
---------- -------------------- ----------------------------- -----------------------------
80 00000000000000001 12 January 2014 00:02:00 January 13, 2014 00:09:00
120 00000000000000002 12 January 2014 00:11:00 January 14, 2014 00:29:00
-
Diagram of the Avro - optional fields - not give 'in the Union"exception
Hi all
I have a problem with the help of the optional fields in a schema by using the JSONAvroBinding and avro.
If I have a scheme of the user who has a first name field. The user may choose to provide the name or not. The field is optional from the perspective of readers.
(this comes from http://docs.oracle.com/cd/NOSQL/html/GettingStartedGuide/avroschemas.html who is nosql avro documentation)
{
"type': 'record."
"namespace": "com.example."
'name': 'Full name',
'fields':]
{'name': 'first', 'type': ['string', 'null']},
{'name': 'last', 'type': "string", "default": "Smith"}
]
}
Here, if I provide this example as Avro scheme, then omit the name when I write, it will work without problem. But when I try to write 'John' it will fail with:
Caused by: org.apache.avro.UnresolvedUnionException: not in the union ['string', 'null']: 'John '.
to oracle.kv.impl.api.avro.JsonBinding$ JsonData.resolveUnion (JsonBinding.java:403)
at org.apache.avro.generic.GenericDatumWriter.resolveUnion(GenericDatumWriter.java:144)
to oracle.kv.impl.api.avro.JsonBinding$ JsonDatumWriter.write (JsonBinding.java:599)
to oracle.kv.impl.api.avro.JsonBinding$ JsonDatumWriter.writeRecord (JsonBinding.java:695)
to oracle.kv.impl.api.avro.JsonBinding$ JsonDatumWriter.write (JsonBinding.java:565)
Truncated. check the log file full stacktrace
It does not work:
{
'first': 'John ',.
"last": "Smith".
}
It works:
{
"last": "Smith".
}
It seems that someone else has had this problem and posted on the Avro site, where a response said that it might be NoSQLs due to lack of libraries:
"The error is thrown from the Oracle NoSQL Avro library use and is not clearly a problem of Avro. You might be better off trying to get help for this Oracle? »
https://issues.Apache.org/jira/browse/Avro-1376
Any thoughts? To me, this seems to be a bug in the JsonBinding class?
According to this:
Sending
{
'first': 'John ',.
"last": "Smith".
}
is not correct.
Instead, sending:
{
'first': {}
'chain': 'John '.
},
"last": "Smith".
}
works.
-
Hello everyone, have a look at the statements below and let me know what wrong with my approach.
CREATE TABLE test (column1 CLOB); INSERT INTO test SELECT to_clob('This is test') FROM dual;When I run the query below, I get data types incompatible error (ORA-00932). Help, please.
SELECT to_clob('This is test two') FROM dual UNION SELECT column1 FROM test;Kind regards
Shiva.
Hey Shiva,
Copied from documentation
http://docs.Oracle.com/CD/B19306_01/server.102/b14200/queries004.htm
Restrictions on operators define the set operators are subject to the following restrictions:
- Set operators are not valid on columns of type
BLOB,CLOB,BFILE,VARRAY, or a nested table. - The
UNION,INTERSECT, andMINUSoperators are not valid onLONGcolumns. - If the selection list prior the operator set contains an expression, you must provide an alias for the expression column to refer in the
order_by_clause. - You cannot specify also the
for_update_clausewith the set operators. - You cannot specify the
order_by_clausein thesubqueryof these operators. - You cannot use these operators in
SELECTstatements containing theTABLEexpressions collection.
- Set operators are not valid on columns of type
-
What is the proposal for substitution for the AMPERSAND (&) in oracle?
Hi all
It's my request...
Select * from
(
Select 'abc' a Union double
Select 'def' a Union double
Select 'abc and xyz' double
) where a = 'abc and xyz '.
Output must be "abc and xyz."
Since I use '&' it prompts you for a value between my keyboard.
Yes, I know, I'll get the output using set scan off the coast, together set off, set escape on.
What is the proposal for substitution for the AMPERSAND (&) in oracle?
"Abc and xyz" value will be passed forward and will be passed to the select...
Kind regards
Varma Koffi Nnkvkashyap wrote:
Hi allIt's my request...
Select * from
(
Select 'abc' a Union double
Select 'def' a Union double
Select 'abc & xyz' double
) where a ='abc & xyz';Output must be 'abc & xyz '.
Since I use '&' it prompts you for a value between my keyboard.
Yes, I know, I'll get the output using set scan off the coast, together set off, set escape on.
What is the alternate to sign & (and) in oracle?
The value 'abc & xyz' will be passed forward and will be passed to the select statement.
Kind regards
Varma Koffi NI think you're confused. Oracle (i.e. DB) doesn't care &. However the frontends like SQL * more: and request you substitution (unless the whole set off etc.).
If you use Java, and pass channels with & without problem.
-
Need info regarding the behavior of Oracle UCM accounts and security groups
Need information about the behavior of Oracle UCM accounts and security groups.
Oracle UCM version: 11.1.1.5.0
Steps to follow:
1. log in with the user "weblogic" and content created with the id of "content1".
2. apply the "@acc1 (R)" and "TestGroup1" to her quote created in step 1
3. close the session
4. connect as that of "acc1user1", the user is not able to see the "content1".
5. close the session
6 log in as "role1user1", the user is not able to see the "content1".
Account information and group:
1. the user "acc1user1" is part of the "@acc1 (R).
2. the user "role1user1" belongs to 'role1 (R)' and is mapped to "TestGroup1" at the Complutense University of MADRID
Expected:
The 'acc1user1' and 'role1user1' should be able to see "content1" because they have at least the read permission.
Please help me understand why users aren't able to see the content.See section 5.5.1.1 in the Manual: http://docs.oracle.com/cd/E23943_01/doc.1111/e10792/c05_security.htm#BGBGIJDJ
If the accounts and roles are used, the result is an intersection, not a Union.
-
Hi all
If we do not specify the order of the UNION/UNION ALL clause then what is the default order of data
Select Stmnt1
UNION
Select Stmnt2
Select Stmnt1
UNION ALL
Select Stmnt2
I use the version 10G AND 11 G
Thank youHi Smidreb,
According to the oracle docs (so you can test also),
You cannot specify the order_by_clause in the subquery of the SET operators (IE in your UNION/UNION ALL cases).
So if your question
select col1,col2... from t1 order by col1 union select col1,col2... from t2 order by col1OR
select col1,col2... from t1 order by col1 union ALL select col1,col2... from t2 order by col1The two queries above will give errors. So that something of not authorized by Oracle. If you think a bit you will come to know why it is so.
But even if you need ordered result, you can achieve as below (drafting of an outer query):
Select * from ( select col1,col2... from t1 union/UNION ALL select col1,col2... from t2 ) order by col1;Come to your original question, what will happen if you do not specify order by?
Now you know u cann't apply the order of. Also, you know how u can apply, if you wish.Also without a prescription by Oracle does not guarantee any order--> FACT.
Now, the answer is obvious.
Published by: J2EE_Life on January 28, 2012 08:48
Published by: J2EE_Life on January 28, 2012 08:49
-
How to find the Union between the column in the table
Hello
I have the followin table and I want to find the union between the lines as below,
I need the result to be as below.create table test5 (tidset varchar2(200)); insert into test5 values('1;2;3;4;5;6;7;8;9;10;11;12;13;15;16;17;18;19;20'); insert into test5 values('1;2;3;4;5;6;7;8;9;10;11;12;13;14;15;16;17;18;19;20'); insert into test5 values('1;2;3;4;6;7;8;9;11;12;13;15;16;19;20'); insert into test5 values('1;4;6;10;6;11;12;13;14;15;16;17;18;19;20');
any help please,.1;4;6;11;12;13;15;16;19;20
Published by: user11309581 on November 17, 2011 21:32Always mention what version of oracle you are using.
The following query will give you the desired result oracle version 11g release 2.
Connected to Oracle Database 11g Release 11.2.0.2.0 SQL> SQL> with test5 as 2 ( 3 select '1;2;3;4;5;6;7;8;9;10;11;12;13;15;16;17;18;19;20' tidset from dual union all 4 select '1;2;3;4;5;6;7;8;9;10;11;12;13;14;15;16;17;18;19;20' from dual union all 5 select '1;2;3;4;6;7;8;9;11;12;13;15;16;19;20' from dual union all 6 select '1;4;6;10;6;11;12;13;14;15;16;17;18;19;20' from dual -- "END OF SAMPLE DATA" 7 ), all_items as 8 ( 9 SELECT regexp_substr(t.tidset, '[^;]+', 1, column_value) item 10 ,t.tidset 11 FROM test5 t 12 ,TABLE(CAST(MULTISET 13 (SELECT LEVEL 14 FROM dual 15 CONNECT BY LEVEL <= 16 length(regexp_replace(t.tidset, '[^;]')) + 1) AS 17 sys.odcinumberlist)) 18 ),item_counts as 19 ( 20 SELECT DISTINCT a.item 21 ,COUNT(DISTINCT a.tidset) over() total_tidset 22 ,COUNT(a.item) over(PARTITION BY a.item) item_occurance_count 23 FROM (SELECT DISTINCT item 24 ,tidset 25 FROM all_items) a 26 ) 27 SELECT listagg(item, ';') within GROUP(ORDER BY to_number(item)) common_items 28 FROM item_counts 29 WHERE total_tidset = item_occurance_count 30 ; COMMON_ITEMS -------------------------------------------------------------------------------- 1;4;6;11;12;13;15;16;19;20 SQL>OR if you have any version of oracle less than 11g release 2 then replace below mentioned line
SELECT listagg(item, ';') within GROUP(ORDER BY to_number(item)) common_itemswith this one
select xmlagg(xmlelement(c,item||';').extract('//text()') order by (to_number(item))) common_itemsIt is because the listagg function used in above query is not supported in versions of oracle 11.2 below.
I hope this helps.
-Gregory
Published by: Mohamed Diarra on November 18, 2011 01:05
Extra line to be changed for the oracle version lower than 11.2 -
Hello all;
I have an interesting problem
I have the following code
and I use a selection similar to thiscreate table table_A ( ID varchar2(200), qty number(6) ); insert into table_a (id, qty) values ('A', 10); insert into table_a (id, qty) values ('B', 6); create table table_B ( ID varchar2(200), colour varchar2(200) ); insert into table_b (id, colour) values ('A', 'Red'); insert into table_b (id, colour) values ('B', 'Black'); create table table_info ( ID varchar2(200), addr varchar2(1000) ); insert into table_info (id, addr) values ('A', '2034 James Street'); insert into table_info (id, addr) values ('B', '2044 Main Street');
gives me the following display belowselect g.id, g.qty, h.colour from table_A g, table_B h where g.id = h.id
now, I would like to change the display so that I can get this ratherID QTY COLOUR A 10 Red B 6 Black
Any help is appreciated. Thank you.ID Addr A '2034 James Street' ID QTY Colour A 10 Red ID Addr B '2044 Main Street' ID QTY Colour B 6 BlackHello
Here's one way:
WITH union_data AS ( SELECT g1.id , TO_CHAR (g1.qty) AS column_2 , h1.colour , g1.id AS sort_id , 2 AS sort_line FROM table_A g1 , table_B h1 WHERE g1.id = h1.id -- UNION ALL -- SELECT 'ID' AS id , 'QTY' AS column_2 , 'Colour' AS colour , g2.id AS sort_id , 1 AS sort_line FROM table_A g2 , table_B h2 WHERE g2.id = h2.id -- UNION ALL -- SELECT t1.id , t1.addr AS column_2 , NULL AS colour , t1.id AS sort_id , 0 AS sort_line FROM table_info t1 -- UNION ALL -- SELECT 'ID' AS id , 'Addr' AS column_2 , NULL AS colour , t2.id AS sort_id , -1 AS sort_line FROM table_info t2 ) SELECT id, column_2, colour FROM union_data ORDER BY sort_id , sort_line ;Here's how it works:
You already know how to get the output lines containing the values of the quantity and color.
You can generate a header line for each of these lines, which owns the labels 'ID', 'Quantity' and 'COLOR', and do a UNION to combine the results.SELECT g.id , TO_CHAR (g.qty) AS qty , h.colour FROM table_A g , table_B h WHERE g.id = h.id -- UNION ALL -- SELECT 'ID' , 'QTY' , 'Colour' FROM table_A g , table_B h WHERE g.id = h.id ;Output:
ID QTY COLOUR ---------- ---------- ---------- A 10 Red B 6 Black ID QTY Colour ID QTY ColourThe problem with the above output is the header lines should be intertwined with data lines, firstly a header, and the data accompanying it. To do this, we can add additional columns to each branch of the UNION that are just for sorting:
SELECT g1.id , TO_CHAR (g1.qty) AS qty , h1.colour , g1.id AS sort_id , 1 AS sort_line FROM table_A g1 , table_B h1 WHERE g1.id = h1.id -- UNION ALL -- SELECT 'ID' AS id , 'QTY' AS qty , 'Colour' AS colour , g2.id AS sort_id , 2 AS sort_line FROM table_A g2 , table_B h2 WHERE g2.id = h2.id -- ORDER BY sort_id , sort_line ;Output:
ID QTY COLOUR SORT_ID SORT_LINE ---------- ---------- ---------- ---------- ---------- A 10 Red A 1 ID QTY Colour A 2 B 6 Black B 1 ID QTY Colour B 2Who has solved a problem but created another. We do not want to see the columns sort_id and sort_line; We just want to use in the ORDER BY clause. However, in a UNION you CN can't ORDER BY anything which is not in the SELECT clause. Depending on your front end, you may be able to hide columns (in SQL * Plus, for example, you can say "COLUMN sort_id NOPRINT"), but here's how you can work around the problem in SQL pure, by the UNION in a separate subquery of the ORDER OF:
WITH union_data AS ( SELECT g1.id , TO_CHAR (g1.qty) AS qty , h1.colour , g1.id AS sort_id , 2 AS sort_line FROM table_A g1 , table_B h1 WHERE g1.id = h1.id -- UNION ALL -- SELECT 'ID' AS id , 'QTY' AS qty , 'Colour' AS colour , g2.id AS sort_id , 1 AS sort_line FROM table_A g2 , table_B h2 WHERE g2.id = h2.id ) SELECT id, qty, colour FROM union_data ORDER BY sort_id , sort_line ;Output:
ID QTY COLOUR ---------- ---------- ---------- ID QTY Colour A 10 Red ID QTY Colour B 6 BlackIt's perfect for the table_a table_b data. To get the data of table_info thus, simply add 2 branches in addition to the UNION, as indicated at the beginning of this message.
It's a bit pointless to do 2 separate petitions, one to get the data and the other to get the header, when these 2 queries use the same tables and the same WHERE clause. An alternative is to cross join table to another table (or, more likely, a game of operation in the form of table of results), which has the values n = 1 and n = 2 and use CASE expressions to display data or its header. I'll leave that as an exercise for the reader.
Published by: Frank Kulash, January 18, 2011 13:02
Explanation added. -
BANNER Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi PL/SQL Release 10.2.0.4.0 - Production CORE 10.2.0.4.0 Production TNS for HPUX: Version 10.2.0.4.0 - Production NLSRTL Version 10.2.0.4.0 - ProductionWITH t AS (SELECT 1 id, 'A' grp, 1 account, 'I' TYPE FROM DUAL UNION ALL SELECT 2, 'A', 1, NULL FROM DUAL UNION ALL SELECT 3, 'A', 2, NULL FROM DUAL UNION ALL SELECT 4, 'B', 1, 'I' FROM DUAL UNION ALL SELECT 5, 'B', 1, NULL FROM DUAL)
When the account is changed by Group (such as going from account 1, 2) I need an additional line with a kind of RIDGRP ACCOUNT TYPE 1 A 1 I 2 A 1 3 A 2 4 B 1 I 5 B 1
I expected results if I use a union
SELECT ID, grp, account, CASE WHEN LAG (account) OVER (PARTITION BY grp ORDER BY id) != account THEN 'R' ELSE TYPE END TYPE FROM t UNION SELECT * FROM t;
However, I want to do it without the unionID,GRP,ACCOUNT,TYPE 1 A 1 I 2 A 1 3 A 2 R 3 A 2, 4 B 1 I 5 B 1
There is a solution to help connect by clause model or somehting?
Published by: pollywog on October 29, 2010 11:32
Published by: pollywog on October 29, 2010 11:38
Published by: pollywog on October 29, 2010 11:39This code will work only, when there is no space in the ID
This means that every integer between 1,..., n must be there.WITH t AS (SELECT 1 id, 'A' grp, 1 account, 'I' TYPE FROM DUAL UNION ALL SELECT 2, 'A', 1, NULL FROM DUAL UNION ALL SELECT 3, 'A', 2, NULL FROM DUAL UNION ALL SELECT 4, 'B', 1,'I' FROM DUAL UNION ALL SELECT 5, 'B', 1, NULL FROM DUAL) -- -- select id, grp, account, decode(level,1,TYPE,'R') from t where level in (1,2) connect by (prior id=id-1 and prior grp=grp and prior account != account) order by id;result:
id grp acount type ----------------------------- 1 A 1 I 2 A 1 3 A 2 R 3 A 2 4 B 1 I 5 B 1Published by: hm on 29.10.2010 09:50
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