I need to create a meterialized view.

hey guys,
i need to create a mv for one of my large database table and that should be refresh for every 30 min. so can you plese give me some syntax.
thanks in advance,
Lakshman.

If you look up the documentation (which you can find at http://tahiti.oracle.com) You will get all the syntax you'll ever need

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Do I need to create a view for this?

Hi Ihave got 2 tables emp and project
In emp tabe:
emp_no
family name
given name
In porgect table:
emp_no
status(assigned,unassigned)
start_date
end_date
emp_no Family_name given_name
1 Smith John
In project table same employee can have many assigement eg
emp_no status start_date end_date
1 assigned 01-may-08 01-july-08
1 assigned 01-sep-08 01-july-09
1 unassigned 01-july-09 01-oct-09
In the form:
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retrive records which have end date between field1 and field2.
The following fields are needed to get from database:
emp.family_name emp.given_name project.start_date project.end_date No.of time assigned
Requirements:
1. project.start_date and project.end_date must be the latest project_end_date for the same emp
so in the above sample date
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So for the given sample data the record expected after query would be(field1=01-jun-08 field2=02-july-09)
emp.family_name emp.given_name project.start_date project.end_date No.of time assigned
Smith John 01-sep-08 01-july-09 2
What is the best approach to get:
1 The lastest project(latest end_date) for the emp
2. get No.of time assigned.
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Thanks for your help

Hi W1zard,
Thanks for your reply. Could you clarify the following points for me:
1.) you could create a master block basing on your emp table and a detail block basing on your project table with the relation over emp_no. set the default_where clause of your detail block programmatically using
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Also is there possible to include the no. of assigned field(select count(*) from project where status='assigned' and emp=emp_no) into the view as well?
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REally appreciated your help!
Michael

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Need to create view ( Urgent )

Hi All,
I have one requirement to create a view .Presently we are using a packaged procedure(view_test_123_pkg) to extract part numbers to write to a file using utl_file package.
Now the requirement is to create a single column view to extract part numbers exactly as package (view_test_123_pkg) is extracting .
below is the package details and view which I have created .Please help
CREATE OR REPLACE package APPS.view_test_123_pkg
as
procedure create_part_ref_proc;
end;
CREATE OR REPLACE package body APPS.view_test_123_pkg
as
procedure create_part_ref_proc
as
l_s_part varchar2(50);
L_CUST_PART varchar2(50);
l_cat varchar2(10);
l_partner_id varchar(30);
l_bare_part varchar2(50);
l_last_bare_part varchar2(50);
l_line_print varchar2(500);
l_last_s_part varchar2(50) :='newww';
l_last_c_part varchar2(50) :='newww';
l_last_cat varchar2(10) :='newww';
l_count number;
l_revision varchar2(50);
l_cust_revision varchar2(100);
l_error_code number;
l_error_text varchar2(200);
l_error_msg varchar2(1000) := '';
l_returned number := NULL;
--===================================================================
-- CURSORS TO READ TABLES
--===================================================================
Cursor part_find is
select distinct
customer_part_number,
internal_item_number,
corp_code cat,
bare_item_number,
customer_revision_number revision,
CUSTOMER_PRIORITY
from APPS.customer_part_ref a
where NVL(PUBLISH_YORN,'Y') = 'Y';
-- order by 3,2,6 desc;
BEGIN
l_count := 0;
l_last_bare_part := null;
For rec in find_part
LOOP
l_s_part := rec.internal_item_number;
L_CUST_PART := rec.customer_part_number;
l_cat := rec.cat;
l_bare_part := rec.bare_item_number;
l_revision := rec.revision;
if instr(L_CUST_PART,'~') = 0
THEN
L_COUNT := L_COUNT + 1;
IF l_last_s_part != l_s_part OR
l_last_cat != l_cat
then
IF l_count > 1
then
IF l_last_bare_part is NULL
then
l_line_print := l_line_print||'"';
end if;
l_line_print := l_line_print||l_cust_revision||'"';
write(r_file, l_line_print);
l_last_bare_part := null;
END IF;
l_line_print := L_CUST_PART||'"'||l_s_part||'"'||l_cat||'"';
l_cust_revision := l_revision;
IF l_bare_part is not NULL
THEN
dbms_output.put_line('bare part is not null');
l_line_print := l_line_print||L_BARE_PART||'"';
l_last_bare_part := l_bare_part;
END IF;
END IF;
IF l_last_s_part = l_s_part AND ----------------------need help here for the same internal_number need but diff customer_part_number need to get one string
l_last_cat = l_cat AND --------example CUst_part1 | cust_part2 | internal_part
l_last_c_part != L_CUST_PART
THEN
l_line_print := L_CUST_PART||'|'||l_line_print;
l_cust_revision := l_revision||'|'||l_cust_revision;
END IF;
IF l_last_s_part = l_s_part AND
l_last_cat = l_cat AND
l_last_bare_part is NULL AND
l_bare_part is not NULL
THEN
l_line_print := l_line_print||l_bare_part||'"';
l_last_bare_part := l_bare_part;
END IF;
l_last_c_part := L_CUST_PART;
l_last_s_part := l_s_part;
l_last_cat := l_cat;
END IF; -- End of instr('~')
END LOOP;
IF l_last_bare_part is null
THEN
l_line_print := l_line_print||'"';
dbms_output.put_line(l_line_print);
END IF;
l_line_print := l_line_print||l_cust_revision;
dbms_output.put_line('after loop');
write(r_file, l_line_print);
dbms_output.put_line(l_line_print);
EXCEPTION
WHEN OTHERS THEN
ROLLBACK;
raise_application_error(-20999,
'An unknown error has occured ');
END;
end;
view :::
create or replace view test_123_view as select distinct
case when instr(partner_part_number,'~') =0
then
case
when bare_item_number is null
then customer_part_number||'"'||internal_item_number||'"'||corp_code||'"'||bare_item_number||'"'
end
end
as part_string
from APPS.CUSTOMER_PART_REF a
where NVL(PUBLISH_YORN,'Y') = 'Y';
need to amend the if condition
IF l_last_s_part = l_s_part AND
l_last_cat = l_cat AND
L_LAST_C_PART != L_CUST_PART
THEN
to the above view
I appreciate any help .
Regards,
Gopi.ch

Hello Gopi.ch,
if it is really urgend, then you should not write so in the title of your post. This is a forum of volunteers and many of the regulars will just ask you why you think it is more important than the other questions.
Second: you post a lot of unformatted code. This makes it harder to read your question.
CREATE OR REPLACE VIEW test_123_view AS
SELECT DISTINCT
        CASE WHEN INSTR(partner_part_number,'~') = 0 THEN
            CASE WHEN bare_item_number IS NULL THEN
                customer_part_number||'"'||internal_item_number||'"'||corp_code||'"'||bare_item_number||'"'
            END
        END AS part_string
FROM    apps.customer_part_ref a
WHERE   NVL(publish_yorn,'Y') = 'Y';
need to amend the if condition
IF l_last_s_part = l_s_part
AND l_last_cat = l_cat
AND l_last_c_part != l_cust_part
THEN
to the above view I don't want to analyze your package for you, so you might want to tell us where you want to add the condition.
Regards
Marcus

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Hi All,
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NEXT SYSDATE+(1/48)
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Try this, I think EXISTS is suported for fast refersh, IN is not - It is Documented
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ERROR at line 5:
ORA-12015: cannot create a fast refresh materialized view from a complex query
--"Trying with EXISTS."
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2 REFRESH FAST
3 START WITH SYSDATE
4 NEXT SYSDATE+(1/48)
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Meterialized view

Hi All,
why we prefer meterialized view than table , if both store query results in the database.
please clarify my doubt.
rampa.

Hi,
Here are some benefits (advantages) of Materialized Views over normal tables:
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How to create a Maintenance view in order to update 4 tables

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I want to update 4 tables having the same key. MANDANT + SIRET (fiscal french ID).
I try to create a maintenace view, i need to update the 4 tables using a single screen.
When i use the relationship the system display a message "Relationships with unsuitable cardinality"
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Hello,
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Tranaction SE11 -> pstion on the field and press the foreign key button.
Check Table has to be your first table; cardinality has to be 1 :1 or 1 to N.
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I need to create a meterialized view.

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