SQL & PL/SQL :: UNION While Selecting From Dual?
Sep 19, 2013
I would like to SELECT these 3 hardcoded titles from DUAL, and have a blank line under each, on the output in this order from the SQL. But the result does not end up that way
SQL> set heading off;
1 select '#ENCODING WINDOWS-1252' from dual
2 union
3 select ' ' from dual
4 union
5 select 'Language Section EN-US' from dual
6 union
7 select ' ' from dual
8 union
9* select 'Catalog Section Title Date Source' from dual
SQL> /
#ENCODING WINDOWS-1252
Catalog Section Title Date Source
Language Section EN-US
- - - - - - - - - - - - - - - - -
Desired Output:
#ENCODING WINDOWS-1252
Language Section EN-US
Catalog Section Title Date Source
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Apr 22, 2010
Is it better to use UNION (or) UNION ALL with DISTINCT,Which one will improve performance.
Query1:
SELECT deptno FROM emp
UNION
SELECT deptno FROM dept
Query2:
SELECT DISTINCT * FROM(SELECT deptno FROM emp
UNION ALL
SELECT deptno FROM dept)
I mean to say query1 is better (or) query2 is better,which query improves the performance.
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May 17, 2012
i'v a problem regarding dual table,i logged to oracle as sys as sysdba and i add a column to dual table and then want to delete that added column but oracle gives "ORA-12988: cannot drop column from table owned by SYS"
i'm not able to drop any user oracle gives "ORA-00604: error occurred at recursive SQL level 1" "ORA-01031: insufficient privileges"
another error:: SP2-0575: Use of Oracle SQL feature not in SQL92 Entry Level oracle gives error when i want to switch user all problems starts when i add that column to dual table
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Oct 29, 2010
why the dual table has only column?
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Apr 29, 2010
What are all the DML operation can be done in DUAL table.?
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Jul 7, 2010
What I'm trying to do is make it so that it returns 'MATCH' when I pass a date that matches a date every two weeks starting Jan 01. Like Jan 01, Jan 15, Jan 29, Feb 12, etc. would return as MATCH Jan 02, Jan 03, etc. would return as NO_MATCH
The part in bold is what I'm having trouble figuring out.
select nvl(
(select 'MATCH'
from dual
where 'date' = '2 week intervals starting Jan 01'
), 'NO_MATCH') from dual
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Aug 30, 2012
when i run this nls qusery i got this error
E:oracleproduct10.2.0db_1BIN>sqlplus
SQL*Plus: Release 10.2.0.4.0 - Production on Thu Aug 30 11:45:59 2012
Copyright (c) 1982, 2007, Oracle. All Rights Reserved.
Enter user-name: sys as sysdba
Enter password:
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> select value from v$nls_parameters where parameter= 'NLS_DATE_FORMAT';
VALUE
----------------------------------------------------------------
DD-MON-RR
SQL> select sysdate from dual;
SYSDATE
----------------
30-????? -12
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Feb 8, 2013
Can we perform DDL & DML Commands on dual table????
If yes then how??
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Apr 26, 2013
Should the following code work? I feel like I have done this before, but I'm getting a "must be a subquery" error now.
update TABLE1
set (FIELD1, FIELD2) =
values(select 'blah','blah' from DUAL)
where PK_FIELD=12345;
If this is invalid, is there another way to hardcode a series of values like this?
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Nov 3, 2011
creating sql query for producing result as per below from dual table.
SELECT to_char( sysdate,'MON-RRRR')
FROM dual
where sysdate between '01-APR-2011' and '31-MAR-2012'
order by 1 desc
from above query the result is
NOV-2011
but i need the result as per below
APR-2011
MAY-2011
JUN-2011
JUL-2011
AUG-2011
SEP-2011
OCT-2011
NOV-2011 CURRENT MONTH
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Mar 14, 2011
I have a package function which is wrapped and I cannot see the code.The package function raises an user-defined exception when :
SELECT ABC.*
FROM ABC
WHERE ABC.A = PACK.FUNC(ABC.B,ABC.C)
But it does not raise any exception and the query works absolutely fine generating desired results when :
SELECT ABC.*
FROM ABC
WHERE ABC.A = (SELECT PACK.FUNC(ABC.B,ABC.C) FROM DUAL)
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Jul 6, 2012
I have ORACLE XE 11g installed on two machines and have been trying my luck to get my local db to query/insert/update a table from the remote db.
I have created the public database link and querying the dba_db_links shows that the links is successfully created (see the bottom of the post). I have also created synonyms for my remote table and queries like select name from jforum_forums succeed, with jforum_forums being a public synonym referring to user.jforum_forums@corona.magic.ubc.ca.
However when I try to insert a row into the remote table, there is a query to the remote DUAL to fetch the last generated ID for a given table similar to the following: SELECT jforum_forums_seq.currval FROM DUAL. Statements of such fail and they either throw an ORA-02019: connection description for remote database not found or ORA-01729: database link name expected. I tried including the database link with the name of the table making it like SELECT jforum_forums_seq.currval FROM DUAL@corona.magic.ubc.ca but that didn't work either.
PS, I should mention that global_names are set to true in both databases and that my database link has the same name as the global_name of the remote database.
OWNER
------------------------------
DB_LINK
--------------------------------------------------------------------------------
USERNAME
------------------------------
HOST
--------------------------------------------------------------------------------
CREATED
[code]...
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Apr 8, 2013
I am trying to understand the difference between using sequence.NEXTVAL from DUAL as against using it direclty in an INSERT statment.
--Sequence Creation
CREATE SEQUENCE SEQ_ID START WITH 1 MINVALUE 1 NOCYCLE CACHE 500 NOORDER;
--Table1 Creation
Create table TABLEA (COL1 number, COL2 varchar2(10),
constraint COL1_PL primary key (COL1));
--Table2 Creation
Create table TABLEB(COL3 number);
alter table TABLEB add constraint COL1_FK foreign key(COL3) references TABLEA(COL1);
-- Option1 - Using sequence.NEXTVAL from DUAL
DECLARE
v_seq_num NUMBER;
BEGIN
SELECT SEQ_ID.NEXTVAL INTO v_seq_num FROM DUAL;
INSERT INTO TABLEA (COL1, COL2) VALUES (v_seq_num, 'test');
INSERT INTO TABLEB (COL3) VALUES (v_seq_num);
END;
-- Option2 - Using sequence.NEXTVAL in INSERT USING RETURNING INTO clause
DECLARE
v_seq_num NUMBER;
BEGIN
INSERT INTO TABLEA (COL1, COL2) VALUES (SEQ_ID.NEXTVAL, 'test') RETURNING COL1 INTO v_seq_num;
INSERT INTO TABLEB (COL3) VALUES (v_seq_num);
END;
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Sep 24, 2013
We are trying to execute a statement SELECT CURRENT_DATE FROM DUAL on Timesten 11.2.2 . It throws error unknown referenced column error. Command> select current_date from dual; 2211:
Referenced column CURRENT_DATE not foundThe command failed. But the following doc shows the support.
TimesTen PL/SQL Support: Reference Summary CURRENT_DATE function
Returns the current date in the session time zone. YIn TimesTen this returns the current date in UTC (universal time). TimesTen does not support local time zones.
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Apr 18, 2013
We have forms 11gr2 on win xp 32bit , weblogic linux server 64bit. We are converting 6i to 11g. Our system has many forms that span on 2 monitors. 1280x768 monitors, so some forms are 2560x768.
When alerts/messages pop up on the screen , they are positioned in the middle of both screens (guessing Oracle by default calculates width =2560/2, height =768/2).
Possible options:
1- is there a way to tell oracle to open alerts/messages a X Y coordinates? Maybe a config file on the server? Already file a Sr with Oracle tech support.
2- tried creating a form to do our messages. but this is flawed since when you call the new form to display the message, then the focus on current form is lost. when the message form is closed (then trigger when_window_activate fires)...this would be hell to try and control all our messages (we may have 20-30 on each big form. We have a total of 118 forms. Lots of messages with Y/N/Cancel options.
3- Maybe create a place holder for messages on all forms (bottom of screen)...thats the best idea we have so far.
4- Is there a way to do something with a java beans? We already have some knowledge with beans since we use image beans and pdf beans.
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May 9, 2010
how to select the sixth highest earner in my employees table.how to select 6th lowest earner..
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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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Sep 7, 2007
Have a table like this:
ID1ID2DATEID2Value
1121/1/20066
1241/1/2006400
1246/1/2006410
1366/1/2006100
2121/1/20077
2246/1/2007350
2247/1/2007360
I need to return 1 row for each ID1 value - and only the ID2 value of 24 and only the most recently dated record for the multiple ID2 values - query would return:
1246/1/2006410
2247/1/2007360
I have worked and worked on this and I am still stumped (part of the problem may be I am also trying to make this work in Crystal Reports but that is for another day). I need to make this work in Oracle first.
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Jun 18, 2013
I want to select data inserted in the table for that day only.
Table name -->ADJCOLUMNS
i want to select areAccount_no-->number datatype TRANSACT_DATE-- NOT NULL DATE I have written the query below .Is the below query correct.
select account_no,to_char(TRANSACT_DATE,'DD-MON-YYYY HH24:MI:SS') T_date from adj
where to_char(TRANSACT_DATE,'DD-MON-YYYY HH24:MI:SS') between
to_char(TRUNC(sysdate),'DD-MON-YY hh24:mi:ss') AND
to_char(TRUNC(sysdate+1) - 1/86400,'DD-MON-YY hh24:mi:ss');
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Jul 6, 2012
I need to find the top two values value for each ID Number:
CREATE TABLE TABLE_1
(ID number (8),
NUMBER_1 number (2),
NUMBER_2 number (2),
NUMBER_3 number (2),
NUMBER_4 number (2));
INSERT INTO TABLE_1
VALUES
('12345679','30','25','30','05');
INSERT INTO TABLE_1
VALUES
('99999999','30','25','15','05');
Desired Result:
ID Number 1st 2nd
12345679 30 30
99999999 30 25
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Mar 29, 2013
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 HPUX: Version 11.2.0.3.0 - Production
[code]...
SELECT job_request_id,
CAST (COLLECT (USER_ID) AS SYS.OdcinumberList) user_ids
FROM mytable
GROUP BY job_request_id;
ORA-22814: attribute or element value is larger than specified in type
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Nov 12, 2012
is there any difference between
- returning from the procedure 2 ref cursors containing result set of 2 queries
- returning from the procedure 1 ref cursor containing result set of that 2 queries as one (with UNION ALL)?
Will 2nd option be faster or similar to 1st?
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Sep 30, 2010
I have a query which has 5 unions, each clause of the union takes 1 hr to run and query results come back in 5 hrs, Is there any way I can make these clause to run in parallel?
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Aug 23, 2012
I am facing an issue in union clause
Below is my query Issue faced is that based on union I want to limit the result and does not want second query to give duplicate result as both queries deal with same table
SELECT TAB1.ID, TAB1.CRNCY_CODE, TAB2.SCHEME_CODE, DECODE( 'INFENG',CAST( '' AS VARCHAR(20)),
NVL(TAB2.ALT1_SCHEME_DESC,TAB2.SCHEME_DESC),TAB2.SCHEME_DESC),
TAB1.SUB_HEAD_CODE, DECODE( 'INFENG' ,CAST( '' AS VARCHAR(20)),NVL(TAB1.ALT1_SUB_HEAD_DESC ,
TAB1.SUB_HEAD_DESC),TAB1.SUB_HEAD_DESC)
[code]...
select null ID,null crncy_code,TAB2.SCHEME_CODE ,
NVL(TAB2.ALT1_SCHEME_DESC,TAB2.SCHEME_DESC),TAB2.SCHEME_DESC,null SUB_HEAD_CODE from TAB2 where TAB2.SCHEME_TYPE ='SCHEME1';
[CODE]
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Aug 17, 2011
I'm just trying to see if there is another way of doing this query without using a UNION. The only way I can see is using a UNION but maybe I'm missing something or a way to do it without a UNION.
Result:
Select any customer within the user_states table who lives in "MO"
Select any customer within the user_cars table who lives in "MO" and has a "White" car
Select any customer within the user_plates table who lives in "MO" and has a plate of "A" or "B"
Join to the user_names table to display the customers name
So, the result would be any customer who lives in "MO" who owns a "White" car and any customer who lives in "MO" who has a plate of "A" or "B".
SQL
select b.customer_id,
b.first_name,
b.last_name
[Code]....
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Jun 28, 2010
I have an query i.e.
I want 3 lines input in 1 line using 2 union operator like
Input:-
'i love playing
football and
volleyball'
i want the output like:-
"i love playing football and volleyball"
solve query using 2 union operator?
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Jul 1, 2010
how can i get a union of two pl/sql tables. ??
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Dec 11, 2012
Cant find any artice on what is better to use unpivot or union all. I can achive same results using either but cant decide what would be better. For example a table has columns:
Name 1, Phone1, Name 2, Phone 2. The result I want would be:
Name 1, Phone 1
Name 2, Phone 2.
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Aug 24, 2012
I have the following sql
select htf.escape_sc(su.sukey) a, htf.escape_sc(su.sukey) b
from udm_su su, udm_lde lde
where su.ldeid = lde.ldeid
and su.sukey in (select su_generic
[code]...
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Jan 31, 2013
I have tables SUBJECT(subject_id, name, number) and PS(ps_id, subject_id, student_id). I need to select all from SUBJECT,subject_id and student_id from SP, joined by subject_id, where student_id needs to be read from session. I'm using asp.net with oracle database. How to get the value from the session.
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