I'm on Oracle Database 10g Enterprise Edition Release 10.2.0.4.0
I am working on a project where have lots of view on a different schema. For performance reasons, we create tables on those views and index them.
The application that uses these tables requires a numeric primary key of a specific length, e.g. number(10). Not all tables have a natural key that matches this requirement, so I added a rownum to the query. I had hoped that casting the rownum to a number(10) would result in the same datatype once the table is created.
e.g.
SQL> create or replace view rownum_to_number10_vw as
2 select cast(rownum as number(10)) objectid, dummy from dual;
View created
SQL> describe rownum_to_number10_vw;
Name Type Nullable Default Comments
-------- ---------------- -------- ------- --------
OBJECTID NUMBER(10) Y
DUMMY VARCHAR2(1 BYTE) Y
SQL> perfect! Now create a table based on this view:
SQL> create table rownum_to_number10_tb as 2 select * from rownum_to_number10_vw;
Table created
SQL> describe rownum_to_number10_tb;
Name Type Nullable Default Comments
-------- ---------------- -------- ------- --------
OBJECTID NUMBER Y
DUMMY VARCHAR2(1 BYTE) Y Oracle does not pick up on the number(10) cast!
How can I force Oracle to create a column with the same datetype as the underlying query?
ps:I know that the 10 in number(10) is more like a constraint than a datatype, but the application that uses this table will create an additional column if the datatype > 10. I want to prevent that from happening...
I have a result set with three columns as 'Product Category', 'Product' & 'QtySales' and 10 rows, sorted in the order Product Category, Product. This means, a product category will have one or more products under it.
Now i want to add a fourth column to my result set, which should display a incremental number sequence from starting from 1, 2, 3.. for each row. Also when the value of the Product Category (1st column) changes, this sequence should be restarted again from 1.
I am migrating sybase to oracle database. A Java developer needs money datatypes.I said to them, please change the cast(<value> as number(19,4) in java code side. but they are not accepted because money data type is used most of the places.
select cast(0 as money) from bank_trans; this sql statements present in java code. I need to create user defined type is equivalent to money datatype.
My steps
I have create user defined data types
create or replace type money as object(money as numbeer(19,4)
select cast(0 as money) from dual;
it shows inconsistent datatypes error.
create or replace type money is table of numbeer(19,4);
I tried to make my Query as simple as possible but also it contains the problem:
SELECT A.Id,A.Attachment,A.CreateDateTime,A.No ,rownum as RowNumber FROM ( SELECT A.Id,A.Attachment,A.CreateDateTime,A.No FROM GOutgoingLetter A , ( SELECT B.Id, B.createdatetime as of0 FROM GOutgoingLetter B WHERE Exists [code]...
when I use Both Order By And RowNum in my Query, Two columns of final Select Are Null: NO & Attachment. whereas this Columns aren't empty.when I comment each one of "ORDER BY B.of0" or ",rownum as RowNumber " everything is correct!!
There are over 1500 records, but this query does not return any row. If i change rownum >= 100 to rownum <= 100 it returns first hundred records though... What is wrong here?
When i try to execute a query, which is organised as the below example, it retrieves data..
select * from ( select col1, col2, col3, col4....coln from TABLE_ONE left outer join TABLE_TWO -- some conditions and group by clause order by 1 asc ) where rownum <=1000;
Again if I use Column alias in the ORDER BY clause col1, the query won't retrieve data.
Also If I use ORDER BY 4 instead of ORDER BY 1, the query wont return data...
select * from ( select col1, col2, col3, col4....coln from TABLE_ONE left outer join TABLE_TWO -- some conditions and group by clause order by 4 asc ) where rownum <=1000;
The whole issue revolves around the inner ORDER BY Clause and external ROWNUM condition..If I eliminate any of the two, the query works fine...I am not sure if indexes have some role to play in it...
I have a requirement in SQL that I have to number each row. Hence I thought of using ROWNUM. But the sql query I'm using uses UNION operator. Hence I used like this
select a,b,rownum as 'field1' from table1 union select c,d,1 as 'field1' from table2
Using rownum in PL/SQL can significantly reduce performance and throughput of queries.
For example,
CODEselect * from (select ... from ... join ... on ... join ... on ... left join ... on ... where ... group by ...) where rownum < 500
takes much more time on a heavy loaded db than
CODEselect Y.* from ( select X.*, rank() over(order by ...) rnk from (select ... from ... join ... on ... join ... on ... left join ... on ... where ... group by ...) X) Y where rnk < 500
I suspect it's because Oracle optimizer goals all_rows and first_rows.
I am trying to do a simple query where I need to return the rows from a table and treat each rown according to some rules.The query works fine, and returns all the rows, usually I have 2 rows returned. WHen I add to the query where ROWNUM = 1, I get the first row returned, but when I use when ROWNUM =2 OR ROWNUM >1, I always get null rows retured, even if I have rows in the database. Here is my query:
SELECT on_time INTO on_time2 FROM work.work_unit WHERE work_code = 1 AND emp_no = :entry_blk.p_emp_no AND work_date = :entry_blk.p_work_date WHERE ROWNUM = 2; --RETURN NULL
I changed it to the following format, but still I get the same results, only I get data when I say when rownum = 1, i get back the first record in the query
SELECT on_time INTO on_time2 FROM (SELECT on_time FROM work.work_unit WHERE work_code = 1 AND emp_no = :entry_blk.p_emp_no AND work_date = :entry_blk.p_work_date) WHERE ROWNUM = 2;
I can't move forward in my form until I figure out why this is not returning records
high number of executions of specific types of queries which is using only rownum clause. For exam.
select ani, rowid from tbl_smschat_upuor where rownum<=:"SYS_B_0";
DB is having high number of executions of these type of queries and these when I m checking the execution plan for the same type of queries it is accessing the full table scan.
======================execution plan for above query 1000 rows selected. Execution Plan ---------------------------------------------------------- Plan hash value: 91289622 --------------------------------------------------------------------------------
title varchar2(100) y publisher varchar2(20) y categoryname varchar2(20) y rating varchar2(2) y
my query is, select ROWNUM AS "Rank",title,publisher from (select rating,title,publisher from bookshelf_test order by rating desc ) where ROWNUM <=3
returns result ,
1 1 MY LEDGER KOCH PRESS 2 2 TO KILL A MOCKINGBIRD HARPERCOLLINS 3 3 THE MISMEASURE OF MAN W.W. NORTON
But inner query (select rating,title,publisher from bookshelf_test order by rating desc ) returns,
1 5 WONDERFUL LIFE W.W.NORTON 2 5 THE MISMEASURE OF MAN W.W. NORTON 3 5 TO KILL A MOCKINGBIRD HARPERCOLLINS 4 5 MY LEDGER KOCH PRESS 5 4 TRUMAN SIMON SCHUSTER 6 4 GOSPEL PICADOR 7 4 HARRY POTTER AND THE GOBLET OF FIRE SCHOLASTIC 8 4 INNUMERACY VINTAGE BOOKS 9 4 JOHN ADAMS SIMON SCHUSTER 10 4 JOURNALS OF LEWIS AND CLARK MARINER 11 4 LETTERS AND PAPERS FROM PRISON SCRIBNER 12 4 PREACHING TO HEAD AND HEART ABINGDON PRESS 13 4 THE SHIPPING NEWS SIMON SCHUSTER 14 4 THE GOOD BOOK BARD 15 4 THE DISCOVERERS RANDOM HOUSE 16 3 THE COST OF DISCIPLESHIP TOUCHSTONE 17 3 SHOELESS JOE MARINER 18 3 KIERKEGAARD ANTHOLOGY PRINCETON UNIV PR 19 3 EMMA WHO SAVED MY LIFE ST MARTIN'S PRESS 20 3 EITHER/OR PENGUIN 21 3 CHARLOTTE'S WEB HARPERTROPHY 22 3 BOX SOCIALS MARINER 23 3 ANNE OF GREEN GABLES GRAMMERCY 24 3 WEST WITH THE NIGHT NORTH POINT PRESS 25 3 UNDER THE EYE OF THE CLOCK ARCADE PUB 26 3 TRUMPET OF THE SWAN HARPERCOLLINS 27 2 COMPLETE POEMS OF JOHN KEATS VIKING 28 1 POLAR EXPRESS HOUGHTON MIFFLIN 29 1 GOOD DOG, CARL LITTLE SIMON 30 1 MIDNIGHT MAGIC SCHOLASTIC 31 1 RUNAWAY BUNNY HARPERFESTIVAL
why final queries top 3 rows r different than inner query ?
how to select 1st record from duplicate vales in a table.
If we created one table with out primary key column In form in search block have uwi value and top_depth value when i enter uwi and top_depth value then when i click search button then it will display all values in master block.
but here duplicate values r there.
SQL> select rownum,uwi,top_depth,base_depth,test_start_date from well_pre_header;
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 ?
i want to replace 4 digit number in a given string with the same number incremented by 10000.
That mean in the given sting 1201 should be replace by 11201 (Icremented BY 10000).
Input String:
<query><matchAll>true</matchAll><row><columnId>1201</columnId><dataType>31</dataType><op>Like</op><val>North America - Houston</val></row><row><columnId>1212</columnId><dataType>31</dataType><op>!=</op><val>Agreement Date Mismatch</val></row><row><columnId>1212</columnId><dataType>31</dataType><op>!=</op><val>Facility Type Mismatch</val></row><row><columnId>1224</columnId><dataType>31</dataType><op>Like</op><val>y</val></row></query>
Required output :
<query><matchAll>true</matchAll><row><columnId>11201</columnId><dataType>31</dataType><op>Like</op><val>North America - Houston</val></row><row><columnId>11212</columnId><dataType>31</dataType><op>!=</op><val>Agreement Date Mismatch</val></row><row><columnId>11212</columnId><dataType>31</dataType><op>!=</op><val>Facility Type Mismatch</val></row><row><columnId>11224</columnId><dataType>31</dataType><op>Like</op><val>y</val></row></query>
I have a text field and if the text field has 5 consecutive numbers then I have to extract the number and the previous character from where the 5digit number starting
For example i/p asdfasfsdS251432dasdasd o/p should be S251432
I have the following select query that works perfectly fine. Returns 25 rows based on the descending order of the price.But, I want add one more expression to this list of columns in this query (apart from customer_id).
the expression should look like Cust-01 for the first customer from the below query all the way to Cust-25 for the last customer.But how can I can generate 01 to 25 in oracle?
select customer_id from (select customer_id from capitalPLAN where member_status = 'MEMBER' AND customer_id NOT in ('156','201','1385','2125','3906','165') order by price desc ) where rownum <= 25
my column type is NUMBER(10,0) ,it accept the input value from text field I using TO_NUMBER(?) to insert value into table, is the a way to handle if the input is 'aaaaaaaaaa' not digit?
Quote:drop table p; create table p (qty number(3), beg_no number(5)); insert into p values(5, 110); insert into p values(8, 786);
drop table s;
create table s (used_no number(5)); insert into s values(111); insert into s values(113); insert into s values(791);
Table p: it has ticket quantity and ticket begining number. Thus according to first record ticket number will begin at 110 and will end at 110+5 (Beg_no +qty). According to second record ticket number will begin at 786 and will end at 786+8 (Beg_no +qty). This table can have many records.
Table s: it has ticket numbers which are sold. The ticket will always be any number from table and will lay in any record in this format between beg_no and beg_no+qty
Note that serial number must reset after each 4 lot_num againt dpt_num. Not that where lot is associated in associated_with_lot there serial number must be same as serial number is for associated lot.
