Updating a table with billion rows

It was an interview question, what's the best way to update a table with 10 billion rows. Give me your suggestions. Thanks in advance.
svk

The best way to answer questions such as this is NOT with a absolute and specific answer. Instead, discuss your strategy for approaching the problem. The first step is to understand your exact requirement. It is surprising how often people
write update statements with an under-qualified where clause. NEVER update a row that does not need to be updated. For example, a statement like:
update mytable set cola = 'ABC' where id in (1, 45, 212);
Assuming id is unique for the table and the specified values exist in the table, we know 3 rows will be updated. Do all of those rows need to be updated? Think about it. If cola is already set to 'ABC' for any of those rows, we could ignore
those rows and make the update more efficient. To do that, you need to add "and cola <> 'ABC' " to the where clause. That is just one example of understanding exactly what you need to do - and doing only that which needs to be done.
Once you understand exactly what you need to do, you need to analyze the impact of the update and identify any potential issues. Updating a lot of rows can take a lot of time and consume large amounts of log and disk space. What else is using
the table? Can you afford to lock the table for the duration of the update? Are there concurrency issues, regardless of whether you update in batches or in one single statement? When using a batch approach, is there an issue if someone runs
a query against the table (i.e., the result is different from that of the same query run after all updates have been completed)? Are you changing something which is included in an index? Are you changing part of the clustered index?
Ultimately, every question you are asked is (or should be) designed to test your problem-solving skills and your skillset. IMO, it is relatively easy to improve your skillset of any particular tool, language, or environment. The other - not so much
and that is why they are more valuable IMO.

Similar Messages

URGENT update a table with a text that has a single quote in it

Hello, I am trying to update a table with a text that has a single quote in it. I believe I need to use two singles quotes but I am not sure how.
For example:
UPDATE TEST
SET DESCRLONG='Aux fins d'exportations'
WHERE etc...
Should I put 2 singles quotes before the quote in the text?
UPDATE TEST
SET DESCRLONG='Aux fins d'''exportations'
WHERE etc...
Thank you very much :)

The best way depends on the version of Oracle.
But, the quick and universal answer is to use two single quotes
SQL> connect test/test
Connected.
SQL> create table test (descrlong varchar2(128));
Table created.
SQL> insert into test values ('This is a string with a '' single quote');
1 row created.
SQL> select * from test;
DESCRLONG
This is a string with a ' single quote
SQL> update test set descrlong='Aux fins d''exportations'
2 where descrlong like 'T%';
1 row updated.
SQL> select * from test;
DESCRLONG
Aux fins d'exportations
SQL>

[ADF BC | ADF Faces] Updating a table with values updated in transaction

Summary: A table is based on a view with a bind variable. Based on some action, I update rows in the view so that they no longer satisfy the query. How do I update the table to reflect this?
I have an ADF Faces page with a multi-select table component on it, mapped to an ADF Business Components view object. The view object has a bind variable (:Status), which is used in the query to only retrieve rows with a specific status.
The user selects rows in the table that should have their status changed, and then hits a button to perform the action. In the backing bean for the page, the button click is processed and the selected rows are updated to a different status. At this point the transaction is not committed.
Changing the status of these rows now means that they no longer match the where clause of the view object, yet they still appear in the table.
My question is, how can I update the table so that rows which don't match the where clause are removed?
This is a simplified version of the problem I am working on - this needs to work when rows that aren't in the table are being updated so that they now MATCH the where clause and rows may also be added or completely removed.

Quite an interesting little problem....
I have created a simple test case to illustrate your scenario - perhaps Steve M could comment...
My scenario:
1). create an EO based on the HR.EMPLOYEES table
2). create an updatable VO based upon the aforementioned EO. Add "COMMISSION_PCT IS NULL" to the where clause.
3). Add the VO to an app module as usual.
4). Create an ADF Faces page by dropping the VO from the data control as an ADF table. Show only first name, last name, and commission pct.
5). Add a command button to the page so I can call various code from the backing bean.
Now, when I update the commision for the first record to ".1" and press the submit button (the one in the table actions facet), the update "takes" - I assume that it's just in the EO cache at this point. The record still shows on the screen, even though it no longer meets the where clause criteria.
When I add some code to the command button (#5) to perform a commit - the record STILL shows on the screen after committing to the DB. I can make the record disappear by either (in the same backing-bean method that does the commit)
a). Re-execute the iterator after the commit
b). Call "clearVOCaches" on the application module (forces the iterator to re-execute)
I even tried programmatically adding the where clause back in (via addWhereClause) and re-executing the iterator - no go. I suspect that the only way to do this would be to post the changes to the DB (without committing them) and then re-execute the query. This, however, would be a killer from a scalability perspective.
John

How to update two tables with trigger

Hi:
how to update two tables with trigger ?
I have two tables :
(1)ASIA
MI number;
(2)ASIA_P
ID number;
When I insert a new value into the asia.MI ,I also can
insert the same value into the asia_p.id field.
I have write a trigger as follows but it does't work.
create or replace trigger MI_TRG
before insert on asia
for each row
declare
seq number;
begin
select MI_SEQ.Nextval into seq from dual;
:new.MI:=seq;
insert into ASIA_PRO(MI_ID)
values
(seq);
end MI_TRG;
How to realize it ?
thanks
zzm

Why do you say it does not work?

How to constuct a table with each row having a button to select

Hi,
Imagine i have 5 orders and i want to select one order to view or update in other page.
How i construct a table with each row having a button to select it.
I'm having a hard time to do this. How i select a backingBean method in Javascript?.
Thanks

I'm trying to put a <h:commandButton> inside <h:dataTable> like this:
                <h:dataTable id="books" value="#{BuscarLibros.booksSearched}" var="book">
                    <h:column>
                        <f:facet name="header">
                            <h:outputText value="#{messages.title}"/>
                        </f:facet>
                    </h:column>
                    <h:column>
                        <f:facet name="header">
                            <h:outputText value="#{messages.isbn}"/>
                        </f:facet>
                        <h:outputText value="#{book.isdn}"/>
                    </h:column>
                    <h:column>
                        <h:outputFormat value="#{book.fechaPublicacion}">
                            <f:convertDateTime pattern="ddd/MM/yyyy"/>
                        </h:outputFormat>
                        <h:commandButton action="#{BuscarLibros.prepareUpdateBook}" value="Hello WORLD"/>
                    </h:column>
                </h:dataTable>but it does not call the method.
If it is outside it calls but inside not. Its strange because Duke's bookstore example from Sun Java EE is like that.
Any clues?

Is it possible to update multiple tables with a dynamic form?

I have columns from two tables populating a dynamic form. I am trying to have the form update both tables on submit. I have tried both a linked transaction and a custom transaction but I am not making progress. Only the master table is being updated. Is it possible with ADDT to update two tables with a dynamic form?

I meant
SXMSMSTAT
SXMSSYERR
Thanks.

TO DRAW A TABLE WITH MULTIPLE ROWS AND MULTIPLE COLOUMNS IN FORM

Hi,
How to draw a table with multiple rows and columns seperated by lines in form printing?

check this
http://sap-img.com/ts003.htm
Regards
Prabhu

How to insert a table with variable rows in smart form

Hi all,
How to insert a table with variable rows in smart form?
Any help would be appreciated.
Regards,
Mahesh.

Hi,
Right click the mouse->create->table
If you want 5 columns, you need to declare 5 cells in one line type of the table
Click on Table -> Details, then do the following
Line Type 1 2 3 4 5
L1 2mm 3mm etc
Here specify the width of the columns as many as you want..
then in the header/main area of the table, click create Table Line, Rowtype is L1, automatically 5 cells will come,In each cell create a text element, display the variable to be printed there.

How can I update the table with a single query for...

I have a table with columns C1 and C2.
C1 C2
A1 null
A1 null
A1 null
A1 null
A2 null
A2 null
A2 null
A3 null
A4 null
A4 null
I want to update my table with a single query so that I would have data like
C1 C2
A1 1
A1 2
A1 3
A1 4
A2 1
A2 2
A2 3
A3 1
A4 1
A4 2
The updated column C2 has the values like serial no grouped on the column C1.

SQL> create table mytable
2 ( c1 varchar2(2)
3 , c2 number(2)
4 )
5 /
Tabel is aangemaakt.
SQL> insert into mytable (c1)
2 select 'A1' from dual union all
3 select 'A1' from dual union all
4 select 'A1' from dual union all
5 select 'A1' from dual union all
6 select 'A2' from dual union all
7 select 'A2' from dual union all
8 select 'A2' from dual union all
9 select 'A3' from dual union all
10 select 'A4' from dual union all
11 select 'A4' from dual
12 /
10 rijen zijn aangemaakt.
SQL> select * from mytable
2 /
C1                                     C2
A1
A1
A1
A1
A2
A2
A2
A3
A4
A4
10 rijen zijn geselecteerd.
SQL> merge into mytable t1
2 using (select c1
3              , row_number() over (partition by c1 order by null) rn
4              , rowid rid
5           from mytable
6        ) t2
7     on (t1.rowid = t2.rid)
8   when matched then
9        update set c2 = rn
10   when not matched then
11        insert values (null,null)
12 /
10 rijen zijn samengevoegd.
SQL> select * from mytable
2 /
C1                                     C2
A1                                      1
A1                                      2
A1                                      3
A1                                      4
A2                                      1
A2                                      2
A2                                      3
A3                                      1
A4                                      1
A4                                      2
10 rijen zijn geselecteerd.Regards,
Rob.

Updating base table with Materialized View's data

Hi,
In order to update base table with MVs data, I am trying real time data transfer between two databases. One is Oracle 8i and other is Oracle 9i. I have created an updatable MV in 9i on a base table using database link. The base table is in 8i. Materialized View log is created in 8i on base table. MV has to be associated to some replication group, but I am not able to create replication group in 9i to which MV has to be associated. The required packages are not installed.
Replication packages are to be used to create replication group are :
/*Create Materialized View replication group*/
BEGIN
DBMS_REPCAT.CREATE_MVIEW_REPGROUP (
gname => 'TEST_MV_GRP',
master => 'TEST_DATA_LINK',
propagation_mode => 'ASYNCHRONOUS');
END;
But above block is giving error.
Can anyone suggest how to resolve this, or are there any other approaches (by not using replication packages) to update base table with MVs data ?
Thanks,
Shailesh

Yes, I created link between two databases and was able to update tables on 8i from 9i database using that link.
The error I am getting while creating replication group is :
ORA-06550
PLS-00201 : identifier 'SYS.DBMS_REPCAT_UTL2@'TEST_DATA_LINK' must be declared
ORA-06550
PLS-00201 : identifier 'SYS.DBMS_REPCAT_UNTRUSTED@'TEST_DATA_LINK' must be declared
ORA-06512 : at "SYS.DBMS_REPCAT_UTL", line 2394
ORA-06512 : at "SYS.DBMS_REPCAT_SNA_UTL", line 1699
ORA-06512 : at "SYS.DBMS_REPCAT_SNA", line 64
ORA-06512 : at "SYS.DBMS_REPCAT", line 1262
Is there any other approach which can be used to update base table with MVs data instead of using replication packages ?
Thanks,
Shailesh

Select on table with 1800 rows is slow

I have a table with 1800 rows. Each entry has a geometry position and a geometry polygon around the position. I am using the polygon to detect which (other) entries are near the current entry.
In the following testdata and the subsequent query, i am filtering on 625 (of 1865) rows, and then using the .STContains-method to finding other rows (the testdata is fully found by this query, in the live database the values are not so regular as in the testdata.
The query take 6500 ms. In the live database, only 800 records are (yet) in the table, and it takes 2200 ms.
select SlowQueryTable.id
from SlowQueryTable
inner join dbo.SlowQueryTable as SlowQueryTableSeen
on SlowQueryTable.[box].STContains(SlowQueryTableSeen.position) = 1
where SlowQueryTable.userId = 2
(The query in the live system is even more complex, but this is main part of it and even simplified as it is just takes too long).
This script generates test data and runs the query:
-- The number table is just needed to generate test data
CREATE TABLE [dbo].[numbers](
[number] [int] NOT NULL
go
declare @t table (number int)
insert into @t select 0 union all select 1 union all select 2 union all select 3 union all select 4 union all select 5 union all select 6 union all select 7 union all select 8 union all select 9
insert into numbers
select * from
select
t1.number + t2.number*10 + t3.number*100 + t4.number*1000 as x
from
@t as t1,
@t as t2,
@t as t3,
@t as t4
) as t1
order by x
go
-- this is the table which has the slow query. The Columns [userId], [position] and [box] are the relevant ones
CREATE TABLE [dbo].SlowQueryTable(
[id] [int] IDENTITY(1,1) NOT NULL,
[userId] [int] NOT NULL,
[position] [geometry] NOT NULL,
[box] [geometry] NULL,
constraint SlowQueryTable_primary primary key clustered (id)
create nonclustered index SlowQueryTable_UserIdKey on [dbo].SlowQueryTable(userId);
--insert testdata: three users with each 625 entries. Each entry per user has its unique position, and a rectangle (box) around it.
-- In the database in question, the positions are a bit more random, often tens of entries have the same position. The slow query is nevertheless visible with these testdata
declare @range int;
set @range = 5;
INSERT INTO [dbo].SlowQueryTable (userId,position,box)
select
users.number,
geometry::STGeomFromText('POINT (' + convert(varchar(15), X) + ' ' + convert(varchar(15), Y) + ')',0),
geometry::STPolyFromText('POLYGON ((' + convert(varchar(15), X - @range) + ' ' + convert(varchar(15), Y - @range) + ', '
+ convert(varchar(15), X + @range) + ' ' + convert(varchar(15), Y - @range) + ', '
+ convert(varchar(15), X + @range) + ' ' + convert(varchar(15), Y + @range) + ', '
+ convert(varchar(15), X - @range) + ' ' + convert(varchar(15), Y + @range) + ','
+ convert(varchar(15), X - @range) + ' ' + convert(varchar(15), Y - @range) + '))', 0)
from (
select
(numberX.number * 40) + 4520 as X
,(numberY.number * 40) + 4520 as Y
from numbers as numberX
cross apply numbers as numberY
where numberX.number < (1000 / 40)
and numberY.number < (1000 / 40)) as positions
cross apply numbers as users
where users.number < 3
CREATE SPATIAL INDEX [SlowQueryTable_position]
ON [dbo].SlowQueryTable([position])
USING GEOMETRY_GRID
WITH (
BOUNDING_BOX = ( 4500, 4500, 5500, 5500 ),
GRIDS =(LEVEL_1 = HIGH,LEVEL_2 = HIGH,LEVEL_3 = HIGH,LEVEL_4 = HIGH),
CELLS_PER_OBJECT = 64, PAD_INDEX = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
go
ALTER INDEX [SlowQueryTable_position] ON [dbo].SlowQueryTable
REBUILD;
go
CREATE SPATIAL INDEX [SlowQueryTable_box]
ON [dbo].SlowQueryTable(box)
USING GEOMETRY_GRID
WITH ( BOUNDING_BOX = ( 4500, 4500, 5500, 5500 ) ,
GRIDS =(LEVEL_1 = HIGH,LEVEL_2 = HIGH,LEVEL_3 = HIGH,LEVEL_4 = HIGH),
CELLS_PER_OBJECT = 64, PAD_INDEX = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
go
ALTER INDEX [SlowQueryTable_box] ON [dbo].SlowQueryTable
REBUILD;
go
SET STATISTICS IO ON
SET STATSTICS TIME ON
-- this is finally the query. it takes about 6500 ms
select SlowQueryTable.id
into #t1
from SlowQueryTable
inner join dbo.SlowQueryTable as SlowQueryTableSeen
on SlowQueryTable.[box].STContains(SlowQueryTableSeen.position) = 1
--on SlowQueryTable.position.STDistance(SlowQueryTableSeen.position) < 5
where SlowQueryTable.userId = 2
drop table #t1
drop table SlowQueryTable
drop table numbers
Using an explicit index hint does do the job, but then the query gets slow if i change the where clause:
select SlowQueryTable.id
into #t1
from SlowQueryTable
with (index([SlowQueryTable_box]))
inner join dbo.SlowQueryTable as SlowQueryTableSeen
on SlowQueryTable.[box].STContains(SlowQueryTableSeen.position) = 1
where SlowQueryTable.userId = 2
leads to 600ms, and changing the where clause
where SlowQueryTable.id = 100
slows it again down to 1200ms. Filtering on ID get massively slowed down when using index hint on the spatial index.
Since the table in the live system will grow to 10000+ rows, and the query is called often by users, I badly need a more efficient query.
Do I have to create a different queries for each use-case, some with index hints and some without?

I've run your example and can confirm your results. There's a couple of things that I noticed though.
After looking at query plans, it's not a matter of "with spatial index" vs. "without spatial index". You have two spatial indexes, one on each column (position and box). When you don't hint the "box" spatial index, the query
uses the "position" spatial index. Because of what they are indexing (points vs. polygons), the "box" spatial index requires a lot more IO. With some (non-spatial) predicates, the "box" spatial index gives better performance,
with others the "position" one does. I've yet to figure out exactly why (short on time, I might get back to it in future), but you can examine query plans and use the spatial index diagnostic procs (e.g. sp_help_spatial_geometry_index_xml ) in
addition to the diagnostics you're running to see why and if you can find a better performing plan/index.
Bear this in mind. Given a choice of multiple spatial indexes, the SQL Server query optimizer is not able to choose (for the most part, IO etc. aside), which one is best. Also, there is usually only one choice of spatial query plan shape, in general. If
your query is more complex than the one in your example, you might benefit by breaking it in two: one query to filter out all the rows and predicates that don't use a spatial index and one query that uses the spatial index on the subset. I've had good
luck with this other situations with complex queries involving spatial predicates. This method may not be applicable to a spatial query as simple as the one in your example, however.
Hope this helps, Bob

Import the table with 0 rows

Hi
I have a problem to import a dump that contains the tables with 0 rows.
When i exported from ORACLE 11.2 64 bit on SERVER 2008 i noticed that log didn't confirm the tables with 0 rows.
When i want to import to ORACLE 11.2 64 bit on other SERVER 2008 i have a lot of errors on this tables with 0 rows.
In the log i get the same tables with 1 row at least, but no one with 0 rows.
I open my dump in TEXTPAD and i see it contains "CREATE ....." these tables.
I don't understand why it happens. I used FUll DUMP by SYS, it didn't help.
This is not first time when i export and import dumps,no errors.
I'm using command "EXP" and "IMP" and every time it's ok.(IF it's a releavent)
Why it happens? any solutions for this issue?
Thanks

I've found (i guess so) solution to this issue
here are two links to this new feature that is called deffered segment creation
The reason for this behavior is 11.2 new feature ‘Deferred Segment Creation‘ – the creation of a table sent is deferred until the first row is inserted.
As a result, empty tables are not listed in dba_segments and are not exported by exp utility
http://www.nativeread.com/2010/04/09/11gr2-empty-tables-skipped-by-export-deferred-segment-creation/
http://antognini.ch/2010/10/deferred-segment-creation-as-of-11-2-0-2/
And this is i've found in official documentation from oracle
Beginning in Oracle Database 11g Release 2, when creating a non-partitioned heap-organized table in a locally managed tablespace, table segment creation is deferred until the first row is inserted. In addition, creation of segments is deferred for any LOB columns of the table, any indexes created implicitly as part of table creation, and any indexes subsequently explicitly created on the table.The advantages of this space allocation method are the following:A significant amount of disk space can be saved for applications that create hundreds or thousands of tables upon installation, many of which might never be populated.Application installation time is reduced.There is a small performance penalty when the first row is inserted, because the new segment must be created at that time.
To enable deferred segment creation, compatibility must be set to '11.2.0' or higher. You can disable deferred segment creation by setting the initialization parameter DEFERRED_SEGMENT_CREATION to FALSE. The new clauses SEGMENT CREATION DEFERRED and SEGMENT CREATION IMMEDIATE are available for the CREATE TABLE statement. These clauses override the setting of the DEFERRED_SEGMENT_CREATION initialization parameter.
+Note that when you create a table with deferred segment creation (the default), the new table appears in the _TABLES views, but no entry for it appears in the SEGMENTS views until you insert the first row. There is a new SEGMENTCREATED column in _TABLES, _INDEXES, and _LOBS that can be used to verify deferred segment creation+
Note:
The original Export utility does not export any table that was created with deferred segment creation and has not had a segment created for it. The most common way for a segment to be created is to store a row into the table, though other operations such as ALTER TABLE ALLOCATE EXTENTS will also create a segment. If a segment does exist for the table and the table is exported, the SEGMENT CREATION DEFERRED clause will not be included in the CREATE TABLE statement that is executed by the original Import utility.

How to create table with 1 row 1MB in size?

Hello,
I am doing some R&D and want to create a Table with 1 row, which is 1 MB in size.
i.e. I want to create a row which is 1 MB in size.
I am using a 11g DB.
I do this in SQL*Plus:
(1.) CREATE TABLE onembrow (pk NUMBER PRIMARY KEY, onembcolumn CLOB);
(2.) Since 1MB is 1024*1024 bytes (i.e. 1048576 bytes) and since in English 1 letter = 1 byte, I do this
SQL> INSERT INTO onembrow VALUES (1, RPAD('A', 1048576, 'B'));
1 row created.
(3.) Now, after committing, I do an analyze table.
SQL> ANALYZE TABLE onembrow COMPUTE STATISTICS;
Table analyzed.
(4.) Now, I check the actual size of the table using this query.
select segment_name,segment_type,bytes/1024/1024 MB
from user_segments where segment_type='TABLE' and segment_name='ONEMBROW';
SEGMENT_NAME
SEGMENT_TYPE
MB
ONEMBROW
TABLE
.0625
Why is the size only .0625 MB, when it should be 1 MB?
Here is the DB Block related parameters:
SELECT * FROM v$parameter WHERE upper(name) LIKE '%BLOCK%';
NUM NAME                                                                                   TYPE VALUE
478 db_block_buffers                                                                          3 0
482 db_block_checksum                                                                         2 TYPICAL
484 db_block_size                                                                             3 8192
682 db_file_multiblock_read_count                                                             3 128
942 db_block_checking                                                                         2 FALSE
What am I doing wrong here???

When testing it is necessary to do something that is a reasonably realistic model of a problem you might anticipate appearing in a production system - a row of 1MB doesn't seem likely to be a useful source of information for "R&D on performance tuning"
What's wrong with creating millions of rows ?
Here's a cut and paste from a windows system running 11.2.0.3
SQL> set timing on
SQL>
SQL> drop table t1 purge;
Table dropped.
Elapsed: 00:00:00.04
SQL>
SQL> create table t1
2 nologging
3 as
4 with generator as (
5     select
6             rownum id
7     from dual
8     connect by
9             level <= 50
10 ),
11 ao as (
12     select
13             *
14     from
15             all_objects
16     where   rownum <= 50000
17 )
18 select
19     rownum          id,
20     ao.*
21 from
22     generator       v1,
23     ao
24 ;
Table created.
Elapsed: 00:00:07.09
7 seconds to generate 2.5M rows doesn't seem like a problem. For a modelling example I have one script that generates 6.5M (carefully engineered) rows, with a couple of indexes and a foreign key or two, then collects stats (no histograms) in 3.5 minutes.
Regards
Jonathan Lewis
http://jonathanlewis.wordpress.com
Now on Twitter: @jloracle

Best way to update a table with disinct values

Hi, i would really appreciate some advise:
I need to reguarly perform a task where i update 1 table with all the new data that has been entered from another table. I cant perform a complete insert as this will create duplicate data every time it runs so the only way i can think of is using cursors as per the script below:
CREATE OR REPLACE PROCEDURE update_new_mem IS
tmpVar NUMBER;
CURSOR c_mem IS
SELECT member_name,member_id
FROM gym.members;
crec c_mem%ROWTYPE;
BEGIN
OPEN c_mem;
LOOP
FETCH c_mem INTO crec;
EXIT WHEN c_mem%NOTFOUND;
BEGIN
UPDATE gym.lifts
SET name = crec.member_name
WHERE member_id = crec.member_id;
EXCEPTION
WHEN NO_DATA_FOUND THEN NULL;
END;
IF SQL%NOTFOUND THEN
BEGIN
INSERT INTO gym.lifts
(name,member_id)
VALUES (crec.member_name,crec.member_id);
END;
END IF;
END LOOP;
CLOSE c_mem;
END update_new_mem;
This method works but is there an easier (faster) way to update another table with new data only?
Many thanks

>
This method works but is there an easier (faster) way to update another table with new data only?
>
Almost anything would be better than that slow-by-slow loop processing.
You don't need a procedure you should just use MERGE for that. See the examples in the MERGE section of the SQL Language doc
http://docs.oracle.com/cd/B28359_01/server.111/b28286/statements_9016.htm
MERGE INTO bonuses D
   USING (SELECT employee_id, salary, department_id FROM employees
   WHERE department_id = 80) S
   ON (D.employee_id = S.employee_id)
   WHEN MATCHED THEN UPDATE SET D.bonus = D.bonus + S.salary*.01
     DELETE WHERE (S.salary > 8000)
   WHEN NOT MATCHED THEN INSERT (D.employee_id, D.bonus)
     VALUES (S.employee_id, S.salary*.01)
     WHERE (S.salary <= 8000);

Filtering a table with 19699 rows

Hello
I am new to Xcelsisu and I am trying to aply filter component to a table with 19699 rows. I is suppose to show in the filter 45 diferent clasifications. I seems to be using only the first 500 rows to aply the filter. I changed the maximum number of rows in the preferences. What should i do ?

a component cannot handle 20.000 rows you should filter these in the database by using quries when getting the data in the dashboard. If there is no database connection available, you can use pivot tables to create list for the different dimensions and then use lookup formulas like match and index o display the data for your chart.

Updating a table with billion rows

Similar Messages

Maybe you are looking for