effect of pump or etl data on the materialized view logs

Similar Questions

• The materialized view log and user...

  Hello
  Suppose a user, we will call him A has a table and another user B must create a log of materialized view on the table that a user has.
  While user B have all the privileges of object (direct priv insert, update, delete... not through a role) on the table to the user may not create a log of mv on this table on its schema...
  Thus, the insert/update/delete stmts on < table_name > are run successfully (after having logged on as user B).
  
  The error message ' ORA-00942: table or view does not exist ' appears when I run the command:
  Connect B/B;
  create log view materialized on table_name with sequence including new values;
  
  Note: I use ORADB 10.2.0.4 and it stands for table-name to user B (which tries to create the log of mv on)...
  
  The req. above is possible somehow?
  
  Thank you
  SIM

  The documentation says the following:

  The materialized view log is created in the same schema as the master of the target.

  HTH!

• How to remove data in the Event Viewer log

  If I go to the event viewer in computer management and select these words. He did a search on the summary of the events of Admisitrator, recently seen nodes and newspaper summary. I want to remove all references in the summary of the events of the administrator, but I want to continue to use the log for all future events.

  I tried to do by ensuring that there is a check box FILE reviews "Show all hidden files" and I also took the checkbox "Hide protected operating system files".  I have to program Data/Microsoft/Event Viewer and the folder is EMPTY.

  Is there a way to do this correctly?

  The observer of events (local) summary of administrative events on my computer displays the event in the last hour, last 24 hours and 7 days. Do you mean that you have received errors Event ID 315 2,000 over the last 7 days?

  If you say yes then the priority should be to find why you get so many errors. It so happened that I had the same report and wrote the following to another forum on January 2, 2012. It can help to solve your problem.

  This error was gets me a few months. This afternoon, I tried to resolve an event ID: error 2 and found a blog that offers a solution to this problem:
  http://manlyelectronics.com.au/blog/resolve-Windows-error-session-HomeGroup-log-failed-to-start-with-the-following-error-0xC0000035-in-Event-Viewer-Microsoft-Windows/

  If you ignore the warning and click "Leave the homegroup" and restart the computer, your home network still works. You can also get no event IDS more: 2 errors and the bonus for me was a cessation of the event ID: 315 errors. I rebooted the computer several times and errors have ceased.

• I get "failed to set the refresh attribute COMMIT for the materialized view" when I try to create a MV using a table and another MV

  Experts,

  I'm trying to create a YOUNG refreshable ON COMMIT MV (xyz) using a table (circuit) and quickly updateable on validation MV (abc), but get an error:

  SQL error: ORA-12054: cannot set the attribute ON COMMIT refresh for the materialized view

  12054 00000 - "cannot set the refresh attribute COMMIT for the materialized view.

  * Cause: The materialized view did not meet the requirements for update to

  moment of validation.

  * Action: Specify only valid options.

  1] MV abc
  = MV abc defined as below =.

  CREATE MATERIALIZED view abc_MV

  Immediate CONSTRUCTION

  REFRESH QUICKLY YOU COMMIT using constraints of trust

  WITH ROWID AS SELECT n.*,.

  n.ROWID noderowid

  node n

  where n.nodetype in (1610000069,1610007267);

  
  

  -Above works OK and MV connect you on table node is created successfully

  =====================================================

  [ 2] Circuit Board

  ======================================================

  CREATE MATERIALIZED VIEW LOG ON Cramer.Circuit WITH SEQUENCE, ROWID ( ) -all columns of table ofcircut parentheses

  INCLUDING THE NEW VALUES;

  -More top works OK and MV connect you on table circuit is created successfully

  ======================================================
  

  
  

  
  

  [3] trying to create MV xyz
  

  ======================================================

  CREATE MATERIALIZED VIEW LOG ON cramer.abc_MV WITH SEQUENCE, ROWID ( ) -all columns of abc_MV brackets

  INCLUDING THE NEW VALUES;

  -Above works OK and log on ABC MV MV gets created successfully

  -Problematic step below

  Xyz_MV CREATE MATERIALIZED VIEW

  IMMEDIATE CONSTRUCTION

  REFRESH QUICKLY YOU COMMIT using constraints of trust

  AS

  SELECT c., c.rowid circuit_rowid, n.rowid tr_rowid

  the circuit c, abc_mv n

  where circuit2startnode = n.nodeid

  and c.rpplanId = n.rpplanId;
  ==========================================================

  Clues on how to solve this problem and make quickly updatable ON Commit MV xyz

  Thanks in advance.

  Chanchal,

  If you can read my original post carefully you may have noticed that all these restrictions will not apply in my case.

  All,

  In any case I found the solution to my problem.

  There are a few additional restrictions for materialized views multilayer

  Additional Restrictions for master materialized views

  The following types of materialized views may not be masters of editable materialized views:

  • ROWIDmaterialized views
  • Complex materialized views
  • Read-only materialized views

  I've updated the underlying MV abc below and everything worked like a charm

  CREATE MATERIALIZED view abc_MV

  Immediate CONSTRUCTION

  REFRESH QUICKLY YOU COMMIT using constraints of trust

  IN SELECT

  n.*, n.rowid noderowid, nt.rowid nodetyperowid

  the node n, nodetype_m nt

  where n.node2nodetype = nt.nodetypeid

  and nt.nodetypeid in (1610000069,1610007267);

  Note: To ADD a join without which I was getting error below (although had primary key on the table of the node)

  SQL error: ORA-23415: materialized view log for "NODE" does not save the primary key

  23415 00000 - "view the log for materialized \"%s\".\"%s\"does not save the primary key.

  * Cause: A primary key materialized view is refreshed quickly, but the

  The materialized view log does not record the primary key information.

  * Action: Use CREATING MATERIALIZED VIEW LOG... Command to add a PRIMARY KEY to

  start recording of the primary key information in the materialized view

  Newspaper.

• question on the materialized view unregistered on the main site

  Hello
  
  you know how one knows, on the main site, on the existence of a materialized view another site referring to other tables to a primary site. It seems registration is not required.
  
  the site main orcl1: I have a table, and a materialized view log defined on A table.
  another site orcl2: have a link db orcl1 and rapid updatable view SCOTT materialized. A_MVW (create a materialized view A_MVW cool off quickly in select * from A@orcl1)
  
  on orcl1 I perform: exec DBMS_MVIEW. UNREGISTER_MVIEW (mviewowner = > 'SCOTT', mviewname = > mviewsite, 'A_MVW' = > 'ORCL2');
  so the materialized view seems to be correctly set aside (because it no longer appears in: select * from DBA_REGISTERED_MVIEWS ;))
  But, to my surprise, I can still perform refreshes fast on A_MVW, which also remove rows from the materialized view log. So how is site orcl1 always aware of the existence of the materialized view?
  
  It seems that, registered or not to the main site, a materialized view has the same... or is not? where is it stored, on the main site, information about materialized views (especially those of quickly updatable) as local tables reffer?
  
  Thank you

  See DocIDs 258634.1, 67371.1, 1031924.6
  on Oracle's Support website.

  Hemant K Collette

• Invites you in a view to filter the data of the other view

  All,
  
  I have 2 displays (bar and pie chart) in the same report. I put a prompt on the report where the user can select a date.
  
  Now, I want to display this quick only once on report and use this prompt to update the data in the two views. Where will I put this prompt and how to use it to filter the data in the two views?
  Must be the guest on the report so that the user can select date and time while displaying the report.
  
  Thanks for your help.
  
  Concerning

  I don't think so.
  Perhaps you want to reduce the dialog box, which will force the vertical alignment. No doubt put a logo in the Virgin region or something.

  Concerning
  Poyard

• Refresh/update of the data in a materialized view

  Hello
  I have question about data in a materialized view, and how it is updated. I think Matt has all my dimension-ID and my (for my specialize needs) aggregated measures of my fact table. I used mat View Wizard to create my opinion - which works perfectly. But now I wonder if I should create some sort of mapping (?) or some kind of trigger to refresh the data in the view of mast. Or are updated automatically when I start my fact table mappings. I use OWB 11 GR 2
  
  THX

  MVs have properties for update - you a discount based on schedules or when dependent data are committed or manually.

  See you soon
  David

• How to understand where are the data in a materialized view, coming from

  HI: when I run select NAME, OWNER of dba_mview_refresh_times, I see a number of materialized views. How can I find more information on this view it's source data and fields. The source in a different database table has changed. But the view on my database where the materialized view has not changed. I want to confirm origin of data in this view
  
  TIA
  Ravi

  Take a look at the column of the QUERY to the DBA_MVIEWS view.

• Trigger on the materialized view

  Hello

  I have the scenario based (Database 11 g):

  There is a view materialized (PERSON), which contains the ID and NAME fields. This MV is update daily with a fast refresh.

  I have a second array (NAMES), with ID and NORM_NAME. This table contains the name of the person, without special characters.

  For example, for recording / * 1 BJORN * / in the PERSON table

  I would check * 1 BJORN * / in table NAMES.

  
  

  Problem is how to fill the NAME table after the filling of the materialized view.

  I used a trigger AFTER INSERT or update, as described below, but even if I update the master table (for this purpose, update the MV), I have only to trigger inserts.

  
  

  Is there a way to implement a trigger "after update" on a materialized view, or do I need another approach?
  

  
  

  /*

  
  

  create or replace TRIGGER TRG_TESTE_MV

  AFTER INSERT OR UPDATE ON THE PERSON

  REFERENCING OLD AS OLD AGAIN AS NEW

  FOR EACH LINE

  BEGIN

  IF THE INSERTION

  INSERT THE NAMES

  VALUES

  (: NEW.id,:NEW.NAME);

  END IF;

  IF THE UPDATE CAN

  UPDATE OF NAMES

  SET NAME =: NEW.NAME WHERE ID =: NEW.id;

  END IF;

  END;

  */

  Thanks for any help

  Your trigger fires, but I doubted that you will be satisfied with the results. You really need to understand how to refresh process works before you begin creating triggers of MV:

  SQL > create table emp1 in select * from EMP
  2.

  Table created.

  SQL > create materialized view emp1 with rowid journal
  2.

  Materialized view log that is created.

  SQL > create materialized view emp1_mv
  2 fast refresh
  3 on request
  4 with rowid
  5 as
  6 select * from emp1
  7.

  Materialized view created.

  SQL > create or replace
  trigger 2 emp1_mv_biudr
  3 before inserting
  4 or update
  5 or delete
  6 on emp1_mv
  7 for each line
  Start 8
  9 insert then dbms_output.put_line ('INSERT' |: new.ename); end if;
  10 if the deletion then dbms_output.put_line ('REMOVE' |: old.ename); end if;
  11 end;
  12.

  Trigger created.

  SQL > insert
  2 in emp1 (empno, ename, sal)
  3 values(1,'X',1000)
  4.

  1 line of creation.

  SQL > validation
  2.

  Validation complete.

  SQL > set serveroutput on
  SQL > exec dbms_mview.refresh ('emp1_mv', 'f');
  INSERTION OF X

  PL/SQL procedure successfully completed.

  SQL > update emp1
  2 set sal = sal + 1
  3 where ename ('King', 'JONES')
  4.

  2 lines to date.

  SQL > validation
  2.

  Validation complete.

  SQL > set serveroutput on
  SQL > exec dbms_mview.refresh ('emp1_mv', 'f');
  INSERTION OF JONES
  INSERTION OF KING

  PL/SQL procedure successfully completed.

  SQL > delete emp1
  2 where in ename ('ALLEN', 'SMITH')
  3.

  2 deleted rows.

  SQL > validation
  2.

  Validation complete.

  SQL > set serveroutput on
  SQL > exec dbms_mview.refresh ('emp1_mv', 'f');

  PL/SQL procedure successfully completed.

  SQL >

  As you can see, refresh MV updates ever. Results update underlying table to remove/insert in MV. That's why your trigger will not give the results that you expected.

  SY.

• The Materialized View - ORA-12052: is unable to fast refresh materialized view

  Hello

  I was hitting my head all day trying to create materialized views. I have made some progress, but have hit a brick wall, unfortunately!

  Basically, I have been invited to take a view and see if I can get the benefits of performance by transforming all or part of it in materialized views. Because the underlying tables of the config is updated quite frequently, I want to fast refresh materialized views on commit. However, when I try to create a materialized view containing an outer join in an aggregated materialized view table, I get ORA-12052: is unable to fast refresh materialized view.

  I went through the documentation and also Rob van Wijkvery useful series of blogs on the topic (especially http://rwijk.blogspot.co.uk/2009/09/fast-refreshable-materialized-view.html) but have not found anything that matches. Maybe I missed something somewhere along the line, or maybe I'm asking just something completely impossible?

  My db is 11.2.0.2.

  Here's the test scripts, I've worked with that:

  drop materialized view test1_test2_mv;
  Drop materialized view test2 journal;
  drop table test2;
  Drop materialized view test1_mv newspaper;
  drop materialized view test1_mv;
  Drop materialized view test1 journal;
  drop table test1;

  create table test1 (identification number,
  type varchar2 (10),
  number of Val,
  update_time date,
  constraint t1_pk primary key (id, type, val));
  
  Insert into test1
  Select 1, 'a', 1001, sysdate - 10/24 Union double all the
  Select 1, 'b', 1003, sysdate - 9/24 Union double all the
  Select 1, 'c', 1002, sysdate - 8/24 Union double all the
  Select 1, had ', 1004, sysdate - 7/24 Union double all the
  Select 1, 'e', 1005, sysdate - 6/24 Union double all the
  Select 1, 'c', 1006, sysdate - 5/24 Union double all the
  Select 2, 'a', 1002, sysdate - 4/24 Union double all the
  Select 2, 'b', 1005, sysdate - 3/24 Union double all the
  Select 3, 'a', 1001, sysdate - 2/24 Union double all the
  Select 3, 'c', 1006, sysdate - 1/24 Union double all the
  Select 3, 'e', 1008, sysdate - 2/24 Union double all the
  Select option 4, has ', 1004, sysdate - 3/24 Union double all the
  Select 5, 'b', 1002, sysdate - 4/24 Union double all the
  Select 5, 'g', 1001, sysdate - 5/24 Union double all the
  Select 6, 'h', 1004, sysdate - 6/24 Union double all the
  Select 7, 'b', 1007, sysdate - 7/24 Union double all the
  Select 7, had ', 1001, sysdate - 8/24 double;

  commit;

  Select * from test1;

  
  CREATE MATERIALIZED VIEW LOG ON test1
  WITH rowid, primary key (update_time)
  including the new values;

  
  Test1_mv CREATE MATERIALIZED VIEW
  IMMEDIATE CONSTRUCTION
  COOL OFF QUICKLY ON COMMIT
  Did YOU SELECT id,
  MAX (case when type = "there" end of val) THAT col_a,.
  MAX (case when type = 'b', then val end) AS col_b,.
  MAX (case when type = 'c' then end val) AS col_c,.
  MAX (case when type = ' then end of val) AS col_d,
  MAX (update_time) AS update_time
  OF test1
  WHERE TYPE in ('a',
  « b »,
  « c »,
  a ')
  GROUP BY id;

  CREATE MATERIALIZED VIEW LOG ON test1_mv
  WITH rowid
  including the new values;

  
  create table test2 (identification number,
  col2 number,
  COL3 varchar2 (10),
  number of COL4,
  constraint t2_pk primary key (id));
  
  Insert into test2
  Select 1, 1, 'bob', 1 double Union all
  Select 2, 1, "sue", 1 double Union all
  Select 3, 1, 'tom', 1 double Union all
  Select 4, 1, 'jay', 1 double Union all
  Select 5, 1, 'art', 1 double Union all
  Select 6, 1, 'kay', 1 double Union all
  Select 7, 1, 'max', 1 double Union all
  Select 8, 1, 'tim', 1 double Union all
  Select 9, 1, "liz", 1 from dual;

  commit;

  
  CREATE MATERIALIZED VIEW LOG ON test2
  WITH rowid, primary key
  including the new values;

  
  Test1_test2_mv CREATE MATERIALIZED VIEW
  IMMEDIATE CONSTRUCTION
  COOL OFF QUICKLY ON COMMIT
  LIKE SOME t2.rowid,.
  T1.ID,
  T1.col_a,
  T1.col_b,
  T1.col_c,
  T1.col_d,
  T1.update_time,
  T2.col2,
  T2. COL3
  OF test1_mv t1,.
  Test2 t2
  WHERE (+) t1.id = t2.id; -symbol of outer join is not correctly displayed on the forums without space, grr!

  ORA-12052: is unable to fast refresh materialized view TEST1_TEST2_MV

  Y at - it any way I can get the materialized view fast refresh on commit or I asking the impossible?

  Add t1.rowid:

  SQL > CREATE MATERIALIZED VIEW test1_test2_mv

  2 BUILD IMMEDIATE

  3 QUICK REFRESH YOU COMMIT

  4 AS t2.rowid SELECT rid2,

  5 t1.rowid rid1,

  6 t1.id

  T1.col_a 7,.

  T1.col_b 8,.

  T1.col_c 9,.

  T1.col_d 10,

  T1.update_time 11,

  T2.col2 12,

  13 t2.col3

  14 OF test1_mv t1,

  15 test2 T2

  16 WHERE t1.id = t2.id

  17.

  Materialized view created.

  SQL > select * from test1_test2_mv

  2.

  RID2 RID1 ID COL_A, COL_B, COL_C COL_D UPDATE_TIME COL2 COL3

  ------------------ ------------------ ---------- ---------- ---------- ---------- ---------- ------------------- ---------- ----------

  AAAYB6AANAAAANDAAA AAAYB/AANAAAAN/AAA 1 1001 1003 1006 1004 25 / 06 / 2014 12:54:16 1 bob

  AAAYB6AANAAAANDAAB AAAYB/AANAAAAN/AAB 2 1002 1005 25 / 06 / 2014 1 sue 14:54:16

  AAAYB6AANAAAANDAAC AAAYB/AANAAAAN/AAC 3 1001 1006 25 / 06 / 2014 16:54:16 1 tom

  AAAYB/AANAAAAN/AAD AAAYB6AANAAAANDAAD 4 1004 25/06/2014 14:54:16 1 jay

  AAAYB6AANAAAANDAAE AAAYB / AANAAAAN / AAE 5 1002 2014/06/25 13:54:16 1 art

  AAAYB6AANAAAANDAAF AAAYB/AANAAAAN/AAG 7 1007 1009 25 / 06 / 2014 10:54:16 max 1

  AAAYB/AANAAAAN/AAH                                                                                                        1 tim

  AAAYB/AANAAAAN/AAF                                                                                                        1 kay

  AAAYB/AANAAAAN/AAI                                                                                                        1 liz

  9 selected lines.

  SQL > update of test2

  2 set col3 = "fly."

  3 where id = 7

  6 m

  1 line update.

  SQL > validation

  2.

  Validation complete.

  SQL > select * from test1_test2_mv

  2.

  RID2 RID1 ID COL_A, COL_B, COL_C COL_D UPDATE_TIME COL2 COL3

  ------------------ ------------------ ---------- ---------- ---------- ---------- ---------- ------------------- ---------- ----------

  AAAYB6AANAAAANDAAA AAAYB/AANAAAAN/AAA 1 1001 1003 1006 1004 25 / 06 / 2014 12:54:16 1 bob

  AAAYB6AANAAAANDAAB AAAYB/AANAAAAN/AAB 2 1002 1005 25 / 06 / 2014 1 sue 14:54:16

  AAAYB6AANAAAANDAAC AAAYB/AANAAAAN/AAC 3 1001 1006 25 / 06 / 2014 16:54:16 1 tom

  AAAYB/AANAAAAN/AAD AAAYB6AANAAAANDAAD 4 1004 25/06/2014 14:54:16 1 jay

  AAAYB6AANAAAANDAAE AAAYB / AANAAAAN / AAE 5 1002 2014/06/25 13:54:16 1 art

  AAAYB/AANAAAAN/AAH                                                                                                        1 tim

  AAAYB/AANAAAAN/AAF                                                                                                        1 kay

  AAAYB/AANAAAAN/AAI                                                                                                        1 liz

  AAAYB6AANAAAANDAAF AAAYB/AANAAAAN/AAG 7 1007 1009 25 / 06 / 2014 10:54:16 1 rob

  9 selected lines.

• Problems with the materialized view

  Hello

  I need help enforce data integrity using a materialized view. In my example, each system can consist of three types of components, and it is modeled using the supertype/subtype relationships. I'm trying to argue that, for a given system, a component cannot reside in more than one table of components. For example, given the system 1, if A component exists in the mobile_components table, it is impossible to insert into the table desktop_components for system 1. Rather than using triggers, I try to use views materialized with unique constraint to enforce this rule based on the example of "The trouble with triggers" article http://www.oracle.com/technetwork/issue-archive/2008/08-sep/o58asktom-101055.html of Tom Kyte. However, I can't seem to make it work because it gives me ORA-12054: cannot set the ON COMMIT refresh attribute.  I use UNION ALL and I know that can be difficult, but I can not understand what are the rules I'm breaking.  I have the necessary privileges.  Oracle 11g.  Can anyone help?

  Thank you

  Mark

  create table systems (
  sys_id number,
  sys_name varchar2(100),
  constraint sys_pk primary key (sys_id),
  constraint sys_uk unique (sys_name));
  
  insert into systems values (1,'System 1');
  insert into systems values (2,'System 2');
  
  
  

  create table mobile_components (
  mo_comp_id number,
  mo_comp_name varchar2(100),
  mo_comp_sys_id number,
  constraint mo_pk primary key (mo_comp_id),
  constraint mo_uk unique (mo_comp_name, mo_comp_sys_id),
  constraint mo_fk foreign key (mo_comp_sys_id) references systems (sys_id));
  
  insert into mobile_components values (1,'Component A',1);
  insert into mobile_components values (2,'Component A',2);
  
  
  

  create table desktop_components (
  de_comp_id number,
  de_comp_name varchar2(100),
  de_comp_sys_id number,
  constraint de_pk primary key (de_comp_id),
  constraint de_uk unique (de_comp_name, de_comp_sys_id),
  constraint de_fk foreign key (de_comp_sys_id) references systems (sys_id));
  
  insert into desktop_components values (1,'Component B',1);
  insert into desktop_components values (2,'Component B',2);
  
  
  

  create table internet_components (
  in_comp_id number,
  in_comp_name varchar2(100),
  in_comp_sys_id number,
  constraint in_pk primary key (in_comp_id),
  constraint in_uk unique (in_comp_name, in_comp_sys_id),
  constraint in_fk foreign key (in_comp_sys_id_ references systems (sys_id));
  
  insert into internet_components values (1,'Component C',1);
  insert into internet_components values (2,'Component C',2);
  
  
  

  create materialized view log on mobile_components with rowid;
  create materialized view log on desktop_components with rowid;
  create materialized view log on internet_components with rowid;
  
  
  

  create materialized view mv_components
  refresh fast on commit with rowid as
  select rowid as row_id, mo_comp_id as comp_id, mo_comp_name as comp_name
  from mobile_components
  union all
  select rowid, de_comp_id, de_comp_name
  from desktop_components
  union all
  select rowid, in_comp_id, in_comp_name
  from internet_components;
  
  alter table mv_components add constraint mv_comp_uk unique (comp_id, comp_name);
  
  
  

  You need a column marker to distinguish which questions you Union, that the data are:

  for example

  Create materialized view mv_components

  cool off quickly on commit with rowid as

  Select 'a' marker, rowid as row_id, mo_comp_id as identifiant_composant mo_comp_name as comp_name

  of mobile_components

  Union of all the

  Select 'b', rowid, de_comp_id, de_comp_name

  of desktop_components

  Union of all the

  Select 'c', rowid, in_comp_id, in_comp_name

  of internet_components;

• Elapsed time for the materialized view vs Master table query

  Hello all;
  
  Small confusion about time up for the vs Master materialized view table query
  
  

  SQL > select count (*), sum (quan_sold), sum (amt_sold) of the sale;

  COUNT (*) SUM (QUAN_SOLD) SUM (AMT_SOLD)
  6000000 12000000 720480000
  Elapsed time: 00:00:30.54
  

  SQL > create materialized view mv1
  2 activate the rewrite of the query as
  3. select count (*), sum (quan_sold), sum (amt_sold) of the sale;

  Materialized view created.
  Elapsed time: 00:00:01.45
  

  SQL > select count (*), sum (quan_sold), sum (amt_sold) of the sale;

  COUNT (*) SUM (QUAN_SOLD) SUM (AMT_SOLD)
  6000000 12000000 720480000
  Elapsed time: 00:00:00.01
  
  Please see the three cases "Elapsed Time"...
  
  When comparing other cases.
  1. my query takes long time (30.54), extraction of data from the sale
  2. create a materialized view takes less time (01:45) why?
  
  Source: http://uhesse.com/2009/07/08/brief-introduction-into-materialized-views/

  >
  Small confusion about elapsed time for the materialized view vs Master table query

  SQL > select count (*), sum (quan_sold), sum (amt_sold) from the sale.

  COUNT (*) SUM (QUAN_SOLD) SUM (AMT_SOLD)
  6000000 12000000 720480000
  Elapsed time: 00:00:30.54

  SQL > create materialized view mv1
  2 activate the rewrite of the query as
  3. select count (*), sum (quan_sold), sum (amt_sold) of the sale;
  Materialized view created.
  Elapsed time: 00:00:01.45

  SQL > select count (*), sum (quan_sold), sum (amt_sold) from the sale.

  COUNT (*) SUM (QUAN_SOLD) SUM (AMT_SOLD)
  6000000 12000000 720480000
  Elapsed time: 00:00:00.01

  Please see the three cases "Elapsed Time"...

  When comparing other cases.
  1. my query takes long time (30.54), extraction of data from the sale
  2. create a materialized view takes less time (01:45) why?
  >
  Many queries take less time the second time you run them. After the first performance, there may be many, if not all, lines in the buffer cache. Then the second round will not make any or all e/s physical but will obtain data from the buffer cache.

  Also, you haven't checked that the MV was even used for the second run.

  Drop the MV and make the query several times and means of the time. Then create the MV and do the same thing.

• create materialized view log on the table without a primary key

  Hi all

  CREATE TABLE client_months 
  (
    SUBJ_CODE         NUMBER(4),
    SERV_CODE         NUMBER(4),
    DEBIT_CODE        NUMBER(4),
    PERIOD_NUM        NUMBER(2),
    PERIOD_NAME       VARCHAR2(40 CHAR),
    FIRST_MON_DAY     DATE,
    LAST_MON_DAY      DATE,
    VALUE_MON_DAY     DATE,
    MONTHES           NUMBER(4,2),
    GARDENING_WEIGHT  NUMBER(5,4),
    REASON_CODE       NUMBER(5),
    STAMP_ACTION      VARCHAR2(1 CHAR),
    STAMP_CDATE       DATE                        DEFAULT SYSDATE,
    STAMP_DATE        DATE,
    STAMP_USER        VARCHAR2(15 CHAR),
    REGION_CODE       NUMBER(9)
  )
  table created.
  
  CREATE UNIQUE INDEX client_months_UK  ON client_months 
  (SUBJ_CODE, SERV_CODE, DEBIT_CODE, PERIOD_NUM, REGION_CODE)
  index created.
  
  CREATE MATERIALIZED VIEW LOG ON client_months with rowid;
  
  CREATE MATERIALIZED VIEW client_months_mv 
  BUILD immediate 
  REFRESH FAST ON COMMIT 
  AS 
  SELECT * FROM client_months;
  
  ORA-12014: table 'CLIENT_MONTHS' does not contain a primary key constraint

  I don't want to refresh the mview when validation is performed on the base table.
  And I don't want to change the base table by adding a primary key.
  
  is it possible to create the mview journal using the unique index? or another solution?
  Please help
  Thanks in advance
  Naama

  Naamas wrote:
  No,
  I already read this post!

  Then you read wrong:

  SQL> CREATE TABLE client_months
    2  (
    3    SUBJ_CODE         NUMBER(4),
    4    SERV_CODE         NUMBER(4),
    5    DEBIT_CODE        NUMBER(4),
    6    PERIOD_NUM        NUMBER(2),
    7    PERIOD_NAME       VARCHAR2(40 CHAR),
    8    FIRST_MON_DAY     DATE,
    9    LAST_MON_DAY      DATE,
   10    VALUE_MON_DAY     DATE,
   11    MONTHES           NUMBER(4,2),
   12    GARDENING_WEIGHT  NUMBER(5,4),
   13    REASON_CODE       NUMBER(5),
   14    STAMP_ACTION      VARCHAR2(1 CHAR),
   15    STAMP_CDATE       DATE                        DEFAULT SYSDATE,
   16    STAMP_DATE        DATE,
   17    STAMP_USER        VARCHAR2(15 CHAR),
   18    REGION_CODE       NUMBER(9)
   19  )
   20  /
  
  Table created.
  
  SQL> CREATE UNIQUE INDEX client_months_UK  ON client_months
    2  (SUBJ_CODE, SERV_CODE, DEBIT_CODE, PERIOD_NUM, REGION_CODE)
    3  /
  
  Index created.
  
  SQL> CREATE MATERIALIZED VIEW LOG ON client_months with rowid
    2  /
  
  Materialized view log created.
  
  SQL> CREATE MATERIALIZED VIEW client_months_mv
    2  BUILD immediate
    3  REFRESH FAST WITH ROWID ON COMMIT -- pay attention to WITH ROWID
    4  AS
    5  SELECT * FROM client_months
    6  /
  
  Materialized view created.
  
  SQL>
  

  SY.

• Refresh the Materialized View constructed from an external table commit?

  Is it possible to create a materialized with Refresh view on commit built from an external table?
  
  I think the answer is "no, because there is no way for the outer table report to the view materialized it has been changed," but I would like to be sure before I tell my client who has requested the opportunity to do this (or, Alternatively, to learn how Oracle hoops I have to cross in order to operate).
  
  I can create a Refresh on demand, it is not a question of not having the necessary permissions to create the materialized view itself.

  No, you can't. The outer table is not modified in a transactional way and there no materialized view logs, so there is no event to hang in and no delta to apply.

  However, you can use dbms_scheduler observer file that will ask for the presence of a file and load the data in a table or refresh a materialized view based on the external table.

  Justin

• diff between the view and the materialized view

  Hi all
  
  Whats different between the view and the materialized view?
  
  could someone help me pls this topic
  
  thnks in advance

  See nothing else that a set is a set of sql statements that join the single or multiple tables and shows the data... However views do not have the data themselves but point to the data.

  Whereas the materialized view is a concept used primarily in the Datawarehousing... these views contain the data itself. Reason being, it is more easy/quick access to the data. The main objective of Materialized view is to perform calculations and display data from multiple tables by using joins.
  check out the link for more information below.
  http://www.geekinterview.com/question_details/29332

  rajeysh
  http://oracleinstance.blogspot.com