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Hi,
I would like to ask if I have a query like this:
SELECT * FROM member
which one is better to use specially performance wise, stored procedure or views?
Technology News @ www.JassimRahma.com
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Neither; it's fine the way it is. There may be other reasons to choose to write a view or a procedure, but performance generally isn't one of them.
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If you're going to use SELECT * FROM ... rather than an explicit list of columns, you should be aware of this potential problem with views[^]: any changes to the underlying table will not be reflected in the view unless you explicitly refresh it.
Since your application is likely to expect a specific list of columns, it's always better to selected them explicitly. The SELECT * FROM ... syntax should only be used for temporary ad-hoc queries when you're exploring the data.
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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Richard Deeming wrote: ...will not be reflected in the view unless you explicitly refresh it.
Select * is a problem regardless of how it originates.
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my suggestion is stored procedure. its create execution plan while create the procedure.
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Based on the performance considerations, the SPs are more versatile and allow a broader range of inquiries and actions than the views.
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in mysql database i implemented simple query on 1 like select * from dbo.company limit 2 .it taking tomuch time.except that table remaning all tables are working well.
in that table records also very less.i try to editing,droping,deleting any thing it is not responding.any one know answer Please give answer.
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Member 9671482 wrote: Please give answer.
Fetching a lot of data takes a lot of time. There's no cure for that, other than fetching less.
Here's some idea's you can try if you need more speed;
- verify and update the indexes (what fields are you using in your search?)
- look into (horizontal) paritioning
- select fewer columns (are you really using them all?)
- execute the optimize table[^]-command to compact the table (if deleted a lot recently)
Bastard Programmer from Hell 
If you can't read my code, try converting it here[^]
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Hi i need some help creating an sql script that can update info from one table in dbase1 to another table in dbase2 that has the same columns and if posible insert date and time in one column when the syncronized is done in the table thats modified? Can anyone help me whit this?
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What have you tried? Where are you stuck? Where's the problem?
Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
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The problem is that i am new at this and i need all the help i can get i have tried with program that compares and execute the changes but i need help qith some script so i can make a bat file that excutes every hour i am fresh at this and need all the help i can get. I can c++, java and some sql but i nned help with oracle.
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Miguel Quintanilla wrote: I can c++, java and some sql but i nned help with oracle.
I've never worked in C++ nor Java, but the Oracle-database speaks SQL.
Miguel Quintanilla wrote: and need all the help i can get.
What are you trying to achieve (on a higher level)? Create some kind of synchronization?
Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
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I have done this on TOAD for oracle:
-- run every 5 MINUTES
BEGIN
dbms_scheduler.create_schedule(
schedule_name => 'INTERVAL_EVERY_5_MINUTES',
start_date => trunc(sysdate)+18/24,
repeat_interval => 'freq=MINUTELY;interval=5',
comments => 'Runtime: Every day all 5 minutes');
END;
/
begin
-- Call a procedure of a database package
dbms_scheduler.create_program
(program_name=> 'PROG_COLLECT_SESS_DATA',
program_type=> '???????', HERE IS MY PROBLEM IS IT POSIBLE TO MAKE A DBLINK TO CONNECTO TO THE OTHER DB AND RETRIEVE INFORMATION FROM A TABLE AND PAST IT ON TO SIMILAR TABLE ON THIS DB. AND PUT A FIELD DNM_SINC TO 'YES' WHEN IN DEFAULT IS NO?
program_action=> '??????????????',
enabled=>true,
comments=>'Procedure to collect session information'
);
end;
begin
-- Connect both dbms_scheduler parts by creating the final job
dbms_scheduler.create_job
(job_name => 'JOB_COLLECT_SESS_DATA',
program_name=> 'PROG_COLLECT_SESS_DATA',
schedule_name=>'INTERVAL_EVERY_5_MINUTES',
enabled=>true,
auto_drop=>false,
comments=>'Job to collect data about session values every 5 minutes');
end;
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Miguel Quintanilla wrote: IS IT POSIBLE TO MAKE A DBLINK
Like this[^]?
Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
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I HAVE DONE THIS DBLINK:
CREATE DATABASE LINK DB_2 CONNECT TO COMPUSOFT IDENTIFIED BY albosapam02 USING 'inv2'
AND THEN I HAVE DONE THIS:
SELECT * FROM PESAJE
MINUS
SELECT * FROM PESAJE@DB_2
IT GIVES ME A RESULT BUT NOW I WANT TO INSERT THAT RESULT IN THE DB_2 AND STORE THE QUERY SO I CAN cALL IT ON THE JOB..
aNY HELP???
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Your message is all in caps-lock; on the internet that's interpreted as shouting.
Miguel Quintanilla wrote: IT GIVES ME A RESULT BUT NOW I WANT TO INSERT THAT RESULT IN THE DB_2 AND STORE THE QUERY SO I CAN cALL IT ON THE JOB..
aNY HELP??
With what exactly? You can select and insert; please describe the problem you're having.
Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
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Ok i have the result from the both db's in this query now i want to insert the result in DB_2
this the query that gives me the result:
select /*+ FULL(Tbl1) */
PSJ_GESTION, PSJ_COD, PSJ_PLACA, PSJ_PESO, PSJ_FECHA
, PSJ_ESTADO, BLZ_COD, MNF_COD, DMN_COD, USR_COD
, PSJ_OPERACION, TIC_COD, PSJ_TARA, PSJ_NETO
from COMPUSOFT.PESAJE Tbl1
minus
select /*+ FULL(Tbl2) */
PSJ_GESTION, PSJ_COD, PSJ_PLACA, PSJ_PESO, PSJ_FECHA
, PSJ_ESTADO, BLZ_COD, MNF_COD, DMN_COD, USR_COD
, PSJ_OPERACION, TIC_COD, PSJ_TARA, PSJ_NETO
from COMPUSOFT.PESAJE@"DB_2" Tbl2
Order by PSJ_GESTION ASC NULLS LAST, PSJ_COD ASC NULLS LAST, PSJ_PLACA ASC NULLS LAST, PSJ_PESO ASC NULLS LAST, PSJ_FECHA ASC NULLS LAST, PSJ_ESTADO ASC NULLS LAST, BLZ_COD ASC NULLS LAST, MNF_COD ASC NULLS LAST, DMN_COD ASC NULLS LAST, USR_COD ASC NULLS LAST, TIC_COD ASC NULLS LAST, PSJ_TARA ASC NULLS LAST, PSJ_NETO ASC NULLS LAST
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INSERT INTO TableName
SELECT [...] Source[^]
Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
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I have try this:
Insert into COMPUSOFT.PESAJE@DB_2
select /*+ FULL(Tbl1) */
PSJ_GESTION, PSJ_COD, PSJ_PLACA, PSJ_PESO, PSJ_FECHA
, PSJ_ESTADO, BLZ_COD, MNF_COD, DMN_COD, USR_COD
, PSJ_OPERACION, TIC_COD, PSJ_TARA, PSJ_NETO
from COMPUSOFT.PESAJE Tbl1
minus
select /*+ FULL(Tbl2) */
PSJ_GESTION, PSJ_COD, PSJ_PLACA, PSJ_PESO, PSJ_FECHA
, PSJ_ESTADO, BLZ_COD, MNF_COD, DMN_COD, USR_COD
, PSJ_OPERACION, TIC_COD, PSJ_TARA, PSJ_NETO
from COMPUSOFT.PESAJE@"DB_2" Tbl2;
But i get "missing values"
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Miguel Quintanilla wrote: But i get "missing values"
Can you post the complete message?
This would only work if the table you're inserting to has columns to match the query's result.
Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
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I have solved it ! It was a missmatch in the first select ok how do i store the query so i can call it in a store_procedure
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Doesn't Oracle have a "create procedure" or something similar? 
Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
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We won't actually do the writing for you but will help when you have a problem (not the entire process). Try breaking it down into smaller bits.
Write a query that compares the 2 tables and identifies the records that need to be updated.
Test it
Now change the query to do the actual update.
Create a stored procedure using the update query.
Look into database job scheduling to call the stored procedure you have created (I know SQL Server but not Oracle).
If this is beyond you then you need to get some education in working with a database, specifically Oracle which is not a trivial exercise.
Never underestimate the power of human stupidity
RAH
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Hi many thanks for all the help you give me. here is my problem i want to use me of this:
this i have on toad:
-- run every 5 MINUTES
BEGIN
dbms_scheduler.create_schedule(
schedule_name => 'INTERVAL_EVERY_5_MINUTES',
start_date => trunc(sysdate)+18/24,
repeat_interval => 'freq=MINUTELY;interval=5',
comments => 'Runtime: Every day all 5 minutes');
END;
/
begin
-- Call a procedure of a database package
dbms_scheduler.create_program
(program_name=> 'PROG_COLLECT_SESS_DATA',
program_type=> 'STORED_PROCEDURE',
program_action=> '?????? i dont have this yet',
enabled=>true,
comments=>'Procedure to collect session information'
);
end;
begin
-- Connect both dbms_scheduler parts by creating the final job
dbms_scheduler.create_job
(job_name => 'JOB_COLLECT_SESS_DATA',
program_name=> 'PROG_COLLECT_SESS_DATA',
schedule_name=>'INTERVAL_EVERY_5_MINUTES',
enabled=>true,
auto_drop=>false,
comments=>'Job to collect data about session values every 5 minutes');
end;
I AM GOING TO USE THIS SCHEDULED JOB AND NOW I WANT TO CREATE MY SQL AND I HAVE A LITTLE BIT OF TROUBLE.
I HAVE DONE THIS DBLINK:
CREATE DATABASE LINK DB_2 CONNECT TO COMPUSOFT IDENTIFIED BY albosapam02 USING 'inv2'
AND THEN I HAVE DONE THIS:
SELECT * FROM PESAJE
MINUS
SELECT * FROM PESAJE@DB_2
IT GIVES ME A RESULT BUT NOW I WANT TO INSERT THAT RESULT IN THE DB_2 AND STORE THE QUERY SO I CAN ALL IT ON THE JOB..
aNY HELP???
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Sorry my knowledge of Oracle and DB2 is very limited, I'm not going to be able to help with the details on those platforms. Oracle has a dedicated support forum, Ask Ted I think, you should get more relevant support there!
Never underestimate the power of human stupidity
RAH
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