SQL & PL/SQL :: Joins On Two Tables With 10 Million Rows Each
Jun 11, 2010
We have two tables, TableA and TableB that contain list of accounts and balances.The requirement is to compare the balances of accounts in both the tables, and if there is a difference, then record that difference with account number in another table.
Both TableA and TableB contain more than 10 million rows.What is the best way to do this task in PL/SQL? A join on TableA and TableB to know the differences has become very slow due to large volume.
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Sep 24, 2010
We have to load 10 million rows in a table from another table based on the multiple joins. How much tablespace size we allocate to the table and for performance point of view how much should be the SGA size.
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Feb 15, 2011
I am trying to update a million rows in one table with the values from another tables.
Table being updated CI_ADJ_CHAR column CHAR_VAL_FK1
Table from which values will be used CK_ADJ columns (cx_id, ci_id)
The CI_ADJ_CHAR.CHAR_VAL_FK1 values match CK_ADJ.CX_ID and should be updated with the value CK_ADJ.CI_ID.
The CK_ADJ table has 1.3 million rows and both the columns have indexes defined. Table definitiuon mentioned below
The CI_ADJ_CHAR table has 14 million rows and will update 1 million rows and has an index on the ADJ_ID column but not on the CHAR_VAL_FK1 column.
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Mar 28, 2011
I huge table with million of rows and no of column more than 300.. is it possible to keep this table in some memory where oracle can access it fast as compare to disk memory.
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Apr 29, 2011
have a performance problem with a simple query, for example:
SELECT *
FROM CA_ADDRESS
WHERE address_k1 = 'L163'
I have an index created in column address_k1. CA_ADDRESS is a 3-4 Million Record table.
I need to improve the performance of the query. How I can improve it?
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Oct 5, 2010
Due to some business requirements a table field needs to change from date to timestamp in order to handle the millisecs.
1>When i alter the row , for a table with 150 million recs will there be a conversion. Is there a recommended way to convert the field. Mind you this field is used as a part of composite PK.
2> There is a interfacing application which connects and copies the data to its system and is using the date type, will that application be able to continue to work without any changes, if it does not care about the millisecs.
3> Will there be performance impact on an existing application that uses the date field to sort
4> Will DB need more space due to the change
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Apr 25, 2012
trying to update a column in a table which has 3 columns of 16million rows from column in another table which has 1million rows, there is no relationship between the 2 tables.
Table A has 3 columns of 16million rows, the first two columns have 16million ID numbers, the 3rd colunm is currently NULL.
Table B has 1million Numbers, i need to somehow update column 3 in table A using the numbers in table B, it doesnt how many times each of the 1 million numbers are used but i dont want it to just update every row to the same value.
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Mar 11, 2013
Ways for improving the Table performance which holds million of records for oracle. Currently we have partitioning and indexing but it doesn't seem to work.
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May 2, 2008
why how ever way i try i cant get the joins on the tables properly.... well i know i have to work hard....if join is not proper the data i extract is also not proper.Well now i have 3 tables...
ps_operations
Name Null? Type
----------------------------------------- -------- --------
ASSB_PT_NBR_SEQ_ID NOT NULL NUMBER(8)
OPERATION_NBR NOT NULL VARCHAR2(10)
EFFECTIVE_FROM_DT NOT NULL DATE
DML_TS NOT NULL DATE
DML_USER_ID NOT NULL VARCHAR2(30)
OPERATION_DESC NOT NULL VARCHAR2(70)
HOURS_PER_PIECE_QTY NOT NULL NUMBER(9,6)
PIECES_PER_HOUR_RATE_QTY NOT NULL NUMBER(15,7)
EFFECTIVE_TO_DT DATE
EXTRACT_IND VARCHAR2(1)
[code]...
I have never worked on CPK and UK....so i dont know how to use them to join the tables,.
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Mar 7, 2010
I have two tables A with columns a.key, a.location_code, a.status and a.first_name and table B with cols b.key, b.location_code, b.status and b.first_name.
I want to find the missing records between the two tables and as well check whether each column is populated correctly. That is if u take a record with id 1 check if loc_code is same in both the tables and if they are different, insert the key and first record column and second record column into a new table. And similarly if there is no record wiht that particular id in the second table, insert the record.
For missing records in the sense for records which are present in A but not in B, am using
Select a.key_no, a.loc_code, b.loc_code
from A,B
where a.key_no=b.key_no(+)
and b.key_no IS NULL
But the problem is I need to put some constraints on the B table like b.status='Married'and b.loc_code='CA'. When am using this condition in the above query, it's throwing me error saying cannot use outer join operator in and or or.And I could not figure out how to check for the columns being populated correctly between the two tables and at the same time check for missing ones
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Aug 30, 2007
Consider the following tables
MANAGERID
101
102
103
104
MANAGERID EMPID
101 ----------------24
101-----------------25
101 ----------------26
104 --------------- 27
write sql query to get the following output without using minus,union,intersect.
MANAGERID EMPID
101 ---------------------------------- 24
101------------------------------------25
101 -----------------------------------26
102 -----------------------------------N/A
103 -----------------------------------N/A
104 -----------------------------------27
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Jun 29, 2011
I am using the SQL-Developer to access and manipulate a database. I am not very sure about the format of the database (I'm new to databases), but I had to setup the TNS-folder.
Anyway, I guess the problem is the same for any database.
I am having a table with the BOM (bill of material) positions of certain articles and I want to change the BOM quantities of some of the articles. What happens is that I can only change some of the rows. For other rows I get the message like (it is in German, so I try to translate it):
"data was commited in another/the same session already. row cannot be updated"
This error message looks like there is somebody else locked on the database and manipulating it, correct? Is that possible to see somewhere which processes/people are currently accessing to the database?
I saw that there is one process/another database, which is having the authorization to access to the database. But where can I check if this process is accessing to the database?
BTW: I used to do this process before, and it worked. I had been able to manipulate arbitrary entries on the database. I guess that the process or the person, mentioned above, hasn't been accessing to the database at that time.
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Oct 27, 2011
I have the task that I have to determine the number of parts that need to be produced based on the number of products sold for the day (each product consists of many parts).
I am using SQL 11g Express.
The report would look something like this:
{OrderDate PartID PartDesc NumOfParts(Total for that day)
10-24-2011 2001 12" X 12" Solid Shelf 108
10-24-2011 2003 12" X 24" Solid Shelf 32
10-24-2011 3001 96" Side Panel 50
[code].......
My issue is, I can't get the equation right to produce the total number of parts. I think I need to multiply ProductPart.NumOfParts by SUM(CustOrder.Qty) Group by CustOrder.SKU.
Below I have what the calculations should look like
SKU PartID Total Parts Needed by SKU
DVCK1212 1001 42 (7 orders * 6 shelves)
DVCK1812 1002 0 (NONE)
DVCK2412 1003 42 (7 orders * 6 shelves)
DVCK3012 1004 78 (13 orders * 6 shelves)
[code].......
Here's my script:
/**PRODUCT**/
CREATE table Product
(
SKU VARCHAR2(10) NOT NULL,
ProdDesc VARCHAR2(50) NOT NULL,
Price NUMBER(5,2),
PRIMARY KEY(SKU)
);
[code].......
Query 1
SELECT ProductPart.NumOfParts
FROM ProductPart,
( SELECT CustOrder.SKU,
sum(CustOrder.qty) cust_qty_sum
FROM CustOrder
[code].......
Result: I am only getting a total of 2 parts
Query 2
SELECT ProductPart.Qty,
ProductPart.PartID,
ProductPart.PartDesc
(SELECT COUNT(CustOrder.SKU)
FROM CustOrder
GROUP BY CustomerOrder.SKU)TotalProducts,
[code].......
ORA-00936: missing expression
Query 3
SELECT Part.PartDesc.
ProductPart.NumOfParts
FROM ProductPart, Part
( SELECT CustOrder.SKU,
sum(CustOrder.qty) cust_qty_sum
FROM CustOrder
[code].......
ORA-00933: SQL command not properly ended
Query 4
SELECT o.OrderDate AS "Date Ordered",
o.OrderDate + 5 AS "Date Due",
pp.PartID AS "Part No.",
pp.NumOfParts * COUNT(o.SKU) AS "Qty"
FROM CustOrder o
[code].......
ORA-00934: group function is not allowed here
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May 18, 2010
i work on oracle 8i with around 950 tables in my database. when i export or import it gives me the no of rows exported / imported from each table. is it possible to take a print out of the no of rows in each table through a single query .
select count(*) from each table takes a long time , since there are 950 tables.
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Apr 21, 2010
I have a table as shown below,
SQL> select * from Main_Table;
AA
--------------------
SUB1
SUB2
Here the SUB1 and SUB2 are "tables" and are similar in their structure. The "Main_Table" will be update dynamically and the no of rows in this table will vary.
Now my question , i need to create a view which will have all the rows from these tables ,in the current case it is something like
create or replace view sample
as
select * from SUB1 union all
select * from SUB2
How can this be achived. I tried as shown below:
spool file_to_exe.sql
select 'select * from ' || AA ||' union all ' from Main_table;
spool off
i will end up in a union all "extra" , if i do like this.
how can achieve this ?..
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May 31, 2011
I have two tables one source table and one destination . Column names and data types of both table are same.
source table (source)
ID NAME
1 aa
2 bb
3 cc
. ...
. ..
. ..
destination Table(dest)
ID NAME
1 aa
2 bb
I need destination table like
destination table
ID NAME
1 aa
2 bb
3 cc
. .....
. ....
I want to remove repeated rows
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Apr 9, 2012
Find the code below,
DECLARE
L_DE_TGUP_ID BBP_ALLOC.DATA_ELEMENT.DATA_ELEMENT_ID%TYPE;
L_ZERO_EXP EXCEPTION;
L_DATA NUMBER;
BEGIN
SELECT DATA_ELEMENT_ID INTO L_DE_TGUP_ID FROM BBP_ALLOC.DATA_ELEMENT WHERE DATA_ELEMENT_CD = 'TGUP';
SELECT DECODE(UPPER('0.0028'),'',0,'0',0,'NULL',0) INTO L_DATA FROM DUAL;
[code]......
Here the relationship between the source and target tables is one to one. but still i am getting "unable to get the stable set of rows from the source tables" error. Source query retrieves only 2 rows which are distinct. but still getting this error.
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Jul 1, 2013
A block shouldn't have rows from multiple tables... Is that true? I read in one of the OTN thread (i don't exactly remember the thread name) that a block can have data from multiple tables. If it doesn't have, what's the table directory in block signifies?
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Aug 30, 2010
When i am running the below merge statement it gives the error as below
MERGE INTO non_tab tt
USING (SELECT non_tab.acct,
non_tab.mis,
non_tab.n_gaap_skey,
non_tab.run,
non_tab.mit_ul AS t0,
CASE
WHEN (( CASE
[code]...
ORA-30926: unable to get a stable set of rows in the source tables.
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Aug 30, 2011
create a procedure or cursor to allocate extents to all tables with zero rows for all the user in the database.I have used the below query to check table with zero rows and no extents allocated.
select onwer,table_name,initial_extent
from dba_tables where initial_extent is null order by owner;
I generated the query to allocate extents by using concatenation in the above query.
select 'ALTER TABLE '||table_name|| ' ALLOCATE EXTENT; '
from dba_tables where initial_extent is null order by owner;
now I want the extent allocation for such table auutomatically for aal the tables with zero rows.
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Aug 7, 2012
I am trying to insert rows in two tables using sql loader.
I have two tables in database as
SQL> desc name
Name Null? Type
---------------------- -------- ------------
ID NUMBER
NAME VARCHAR2(20)
BD DATE
SQL> desc name3
Name Null? Type
--------------------- ----------- -------------
ID NUMBER
NAME VARCHAR2(20)
BD DATE
I created controlfiles as
[oracle@DBTEST sqldri]$ cat datafile.ctl
options (direct=true)
load data
INFILE *
into table name truncate
when id='1'
[code]....
when i run sql loader as
[oracle@DBTEST sqldri]$ sqlldr hr/hr control=/u01/sqldri/datafile.ctl
SQL*Loader: Release 10.2.0.1.0 - Production on Tue Aug 7 23:30:07 2012
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Load completed - logical record count 2.
no rows is inserted..the log file contain entries as
[oracle@DBTEST sqldri]$ cat datafile.log
SQL*Loader: Release 10.2.0.1.0 - Production on Tue Aug 7 23:30:07 2012
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Control File: /u01/sqldri/datafile.ctl
Data File: /u01/sqldri/datafile.ctl
Bad File: /u01/sqldri/datafile.bad
[code]....
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Jul 23, 2012
I want to compare two tables , and delete the common rows from the first table
Here is what i have done :
Create table test1(Test1C1 Number,
Test1C2 varchar2(50));
Create table test2(Test2C1 Number,
Test2C2 varchar2(50));
Insert into test1 values(1,'testdata1');
Insert into test1 values(2,'testdata2');
Insert into test1 values(3,'testdata3');
[code].......
it deletes all the records from Table test1. What should I modify here ? or should I write a different query ?
The desired contents in table test1 will be
2 testdata2
4 testdata4
6 testdata6
8 testdata8
10 testdata10
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Sep 15, 2013
When I am executing merge statement I am getting the below error.
ORA-30926: unable to get a stable set of rows in the source tables
MERGE INTO TAN_LIST t
USING (SELECT * FROM (SELECT row_number () over (partition by TANNO order by null) rn,
dno,
TANNO,
SOL,
[Code]....
The query is fectching below data.
SELECT dno,TANNO,SOL,DESC,class,ct_dt,tcost
FROM MAT_LIST;
DNOTANNOSOLDESC CLASS CT_DT TCOST
63007565ADclass A A12345 08/28/131
[Code]...
Intially thers is no records in the TAN_LIST table. When I run the merge statemnt I am able to insert all 15 records into that table.
When I run the same merge statemment second time I am getting the below error.
ORA-30926: unable to get a stable set of rows in the source tables
So that I have used partition by cluase in the slect statement and I am able to resolve the error.
But it's inserting only 14 records not all 15. How to process all 15 records without the error..
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Jul 12, 2012
i'm using the below query to update a VOTER table with over 15million records but it's taking ages to finish. i am using 11gr2 on linux
the query:
MERGE INTO voter dst
USING (
SELECT voterid,
pollingstation || CASE
WHEN ROW_NUMBER () OVER ( PARTITION BY pollingstation
[code]........
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Jun 21, 2013
I want to update a table 8 million records of a table which has 10 millions records, what could be the best strategy if the table has a BLOB column with 600GB worth of data. BLOB itself is 550GB. I am not updating the BLOB column. Usually with non-BLOB data i have tried doing "CREATE TABLE new_table as select <do the update "here"> from old_table;" method .
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Nov 15, 2012
I need to insert almost million rows in my database.I have already split the row in separate files so that task would be easier. Now, i am planning to put commit after every 1000 line so that undo generation would be less and no locking would take place if i inserting those lines from multiple sessions.
But how can i insert commit after every 1000 line??
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Nov 22, 2010
the problem is: 2 tables - one with 2 million records, and the other with 8000 records.
i need to compare for each record in a table if there's a similar string on the other table.
i've created a procedure that does the following:
opens the first cursor (select col1,col2,col3,col4... from table 1)
loop
opens second cursor (select col1 from table 2)
loop
if utl_match(col1, table2.col1) > 80 then
insert col1,col2,col3,col4... into tableX
end if
close second cursor
close first cursor
the thing is that this procedure takes forever to end...about 8 days.
is it because im using the utl_match function? is there a way to speed this up?
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Aug 13, 2013
I want to know how we can insert more than 3 million records from one table to another table. Can we use Bulk collect and forall to insert the all data.Can we use create table tableB as select * from tableA; From the above which is one is performance wise good.
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Sep 21, 2012
Lets take the basic emp table for our Referenece and lets assume that it contains around 60000 Records and all the deptno in that table are Initially 10. Please provide an update statement which would update deptno column of EMP table((based on) order by EMPNO) in for every 120 records incrementing by 1.(DeptNo to be incremented by 1,like 10 ,11 , 12 etc).
First 120 Records deptno should be 10,
Next 120 Records deptno should be 11, and so on.
.
.
.
.
.
.
For Last 120 records deptno should be updated with 500.
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Sep 16, 2013
what are the type of ways to update the 10 million records table with certain condition?
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