Data base access time

Hello all,
I have following scenario:
1) I have one select query which is fetching 5,000 records from data base in single select.
2)Two select query from the same table fetching 1,000 records each time.
I want to know that which option will take more time that is 1 will take more time or 2.
Thanks and regards
Sachin

Hi Sachin,
The second selection query will take more time beacuse it has to hit the data base 2 times and also increases traffic on database server hence it takes more time .
and second selection query may take 4 to 5 times of first selection query.
Regards
Babumiya Mohammad.

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Data base Access

Hi
I am developing a PDK (java) application
From my application i need to get data from .Net system
What are all the possible ways to access data from .Net System
Thanks
Rudra

When you say .NET System what do you mean? Is that an MS SQL Server, a Sharepoint portal, other .NET system....?
There are many ways to access database.
In my opinion the most recommended one is using EJB or Hibernate because that gives you real MVC seperation, but it will be a bit difficult to implement in a PDK application.
The quickest way will be using JDBC: Either configure the connection on the app server and access it's alias using the Initial context object or create the JDBC connection in your code but I highly recommend configuring it on the app server.
Once configured, you can use something like that to access the object:
InitialContext ctx = new InitialContext();
DataSource ds = (DataSource) ctx.lookup(<YOUR_ALIAS>);
Connection conn = ds.getConnbection();
Hope it helps,
Roy

Reducing Data base selection time

Hi,
I need to get the Excise Documnets which are not Billed. For that I've used following logic. But it is taking much time to get the data.
SELECT a~exnum
         a~exyear
         a~exdat
         a~rdoc2
         SUM( a~exbed )
         SUM( a~ecs )
         SUM( a~exaddtax1 )
         b~vbtyp
         b~knumv
         b~bukrs
         b~kunrg
      FROM j_1iexcdtl AS a INNER JOIN vbrk AS b
      ON ardoc2 EQ bvbeln
      INTO TABLE lt_excise WHERE a~exdat IN s_fkdat      AND
                                 a~status EQ 'C'          AND
                                a~exdat ge '20090401'   AND
                                 NOT EXISTS ( SELECT vbeln FROM vbrk WHERE vbeln EQ a~rdoc3 AND
                                                                           vbtyp EQ 'M' ) AND
                                 b~vbtyp EQ 'U'          AND
                                 b~bukrs IN s_bukrs      AND
                                 b~kunrg IN s_kunrg
                           GROUP BY a~exnum
                                    a~exyear
                                    a~exdat
                                    a~rdoc2
                                    b~vbtyp
                                    b~knumv
                                    b~bukrs
                                    b~kunrg.
Pl help to reduce the time for database selection.
Regards,
Rajiv. V

Hi,
To decrease the load on DB ,you can process Group by and SUM functions in Loop Endloop of resulting table.
Avoid using Subqueries with not condition.I read ,NOT compromises the index and starts linear search.
There are already many discussions on usage on For all entries and Join .So search forum for more details.
The performance of join and For all entries are context oriented.
SELECT a~exnum
a~exyear
a~exdat
a~rdoc2
SUM( a~exbed )                 " Avoid using SUM use Control break in loop endloop
SUM( a~ecs )
SUM( a~exaddtax1 )
b~vbtyp
b~knumv
b~bukrs
b~kunrg
FROM j_1iexcdtl AS a INNER JOIN vbrk AS b
ON a~rdoc2 EQ b~vbeln   "Rdoc2 is available in secondary index ,I am not sure whether this affects the performance ,EXPERT advice is required
INTO TABLE lt_excise WHERE a~exdat IN s_fkdat AND
a~status EQ 'C' AND
* a~exdat ge '20090401' AND                 "if possible, try to use indexed fields from VBRK
NOT EXISTS ( SELECT vbeln FROM vbrk WHERE vbeln EQ a~rdoc3 AND   "Avoid using Not this would compromise the index or use Delete itab on resulting table
vbtyp EQ 'M' ) AND
b~vbtyp EQ 'U' AND
b~bukrs IN s_bukrs AND
b~kunrg IN s_kunrg
GROUP BY a~exnum                       " Avoid Group by
a~exyear
a~exdat
a~rdoc2
b~vbtyp
b~knumv
b~bukrs
b~kunrg.

Other Data Base Access in BSP

Dear All,
Is it possible to make the BSP application to communicate with other DataBases like SQL , Oracle?
Kind Regards,
Mukesh

Hi,
As long as you can do it using ABAP !
You can use transaction DBCO for this.
Here are some helpful links
/people/sap.user72/blog/2006/08/31/configure-dbco-database-multiconnect-on-ibm-i5iseries
http://help.sap.com/saphelp_nw70/helpdata/EN/df/455ec9747111d6b25100508b6b8a93/frameset.htm
Best regards,
Guillaume

What is logical data base and how it is differfrom DDIC AND DATABASE

HI ,
CAN ANY BODY HELP ME TO FIND THIS

Hi
A logical database is a special ABAP/4 program which combines the contents of certain database tables. You can link a logical database to an ABAP/4 report program as an attribute. The logical database then supplies the report program with a set of hierarchically structured table lines which can be taken from different database tables.
LDB offers an easy-to-use selection screens. You can modify the pre-generated selection screen to your needs. It offers check functions to check whether user input is complete, correct, and plausible. It offers reasonable data selections. It contains central authorization checks for data base accesses. Enhancements such as improved performance immediately apply to all report programs that use the logical database.
Less coding s required to retrieve data compared to normal internel tables.
Tables used LDB are in hierarchial structure.
Mainly we used LDBs in HR Abap Programming.
Where all tables are highly inter related so LDBs can optimize the performance there.
Check this Document. All abt LDB's
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.highlightedcontent?documenturi=%2flibrary%2fabap%2fabap-code-samples%2fldb+browser.doc
GO THROUGH LINKS -
http://www.sap-basis-abap.com/saptab.htm
http://help.sap.com/saphelp_nw04/helpdata/en/9f/db9bfa35c111d1829f0000e829fbfe/content.htm
http://help.sap.com/saphelp_nw04/helpdata/en/9f/db9b5e35c111d1829f0000e829fbfe/frameset.htm
http://help.sap.com/saphelp_nw04/helpdata/en/c6/8a15381b80436ce10000009b38f8cf/frameset.htm
/people/srivijaya.gutala/blog/2007/03/05/why-not-logical-databases
Re: **LDB**
www.sapbrain.com/FAQs/TECHNICAL/SAP_ABAP_Logical_Database_FAQ.html
www.sap-img.com/abap/abap-interview-question.htm
www.sap-img.com/abap/quick-note-on-design-of-secondary-database-indexes-and-logical-databases.htm
http://help.sap.com/saphelp_nw04/helpdata/en/9f/db9b5e35c111d1829f0000e829fbfe/content.htm
http://help.sap.com/saphelp_nw2004s/helpdata/en/9f/db9bb935c111d1829f0000e829fbfe/content.htm
Gothru the blog which provides info on LDB's:
/people/srivijaya.gutala/blog/2007/03/05/why-not-logical-databases
<b>Reward points for useful Answers</b>
Regards
Anji

Logical data base

hi experts!!
i am working on the LDb report and i have created a LDB zaxxx in se36 and using the same LDB to code in se38 and in attributes i have mentioned the name of LDB.
when i code follwoing:
GET ZAXXXX FIELDS INVOICE_NUM CUST_NAME CUST_PO_NUM INV_DATE.
ITS GIVING ERROR THAT ZAXXX IS NOT SPECIFIED FOR FIELD SELECTION.
when i use only
GET ZAXXXX . when i debug valuse are comming but when process the report its giving no valuse.
plz suggest me on the same..
mahesh

hi this may be of some help.
A logical database is a special ABAP/4 program which combines the contents of certain database tables. You can link a logical database to an ABAP/4 report program as an attribute. The logical database then supplies the report program with a set of hierarchically structured table lines which can be taken from different database tables.
LDB offers an easy-to-use selection screens. You can modify the pre-generated selection screen to your needs. It offers check functions to check whether user input is complete, correct, and plausible. It offers reasonable data selections. It contains central authorization checks for data base accesses. Enhancements such as improved performance immediately apply to all report programs that use the logical database.
Less coding s required to retrieve data compared to normal internel tables.
Tables used LDB are in hierarchial structure.
Mainly we used LDBs in HR Abap Programming.
Where all tables are highly inter related so LDBs can optimize the performance there.
Check this Document. All abt LDB's
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.highlightedcontent?documenturi=%2flibrary%2fabap%2fabap-code-samples%2fldb+browser.doc
GO THROUGH LINKS -
http://www.sap-basis-abap.com/saptab.htm
http://help.sap.com/saphelp_nw04/helpdata/en/9f/db9bfa35c111d1829f0000e829fbfe/content.htm
http://help.sap.com/saphelp_nw04/helpdata/en/9f/db9b5e35c111d1829f0000e829fbfe/frameset.htm
http://help.sap.com/saphelp_nw04/helpdata/en/c6/8a15381b80436ce10000009b38f8cf/frameset.htm
/people/srivijaya.gutala/blog/2007/03/05/why-not-logical-databases
Re: **LDB**
www.sapbrain.com/FAQs/TECHNICAL/SAP_ABAP_Logical_Database_FAQ.html
www.sap-img.com/abap/abap-interview-question.htm
www.sap-img.com/abap/quick-note-on-design-of-secondary-database-indexes-and-logical-databases.htm
http://help.sap.com/saphelp_nw04/helpdata/en/9f/db9b5e35c111d1829f0000e829fbfe/content.htm
http://help.sap.com/saphelp_nw2004s/helpdata/en/9f/db9bb935c111d1829f0000e829fbfe/content.htm
Gothru the blog which provides info on LDB's:
/people/srivijaya.gutala/blog/2007/03/05/why-not-logical-databases
Sample code
TABLES: SPFLI,
SFLIGHT,
SBOOK,
SCARR.
START-OF-SELECTION.
GET SPFLI.
WRITE:/ SPFLI: , SPFLI-CARRID, SPFLI-CONNID,
SPFLI-AIRPFROM, SPFLI-AIRPTO.
GET SFLIGHT.
WRITE:/ SFLIGHT: , SFLIGHT-CARRID, SFLIGHT-CONNID, SFLIGHT-FLDATE.
GET SBOOK.
WRITE:/ SBOOK: , SBOOK-CARRID, SBOOK-CONNID,
SBOOK-FLDATE, SBOOK-BOOKID.
GET SFLIGHT LATE.
WRITE:/ GET SFLIGHT LATE: , SFLIGHT-FLDATE.
with regards,
Hema SUndara.
pls reward if helpful.

Discovere acess problem in data base 10g

create user for discovere Data base access for one user.Now he is facing log in problem it shows
A connection error has occurred.
- Failed to connect to database - ORA-12154: TNS:could not resolve the connect identifier specified
can anybody please help me.
Thanks,
Dave

1.On client machine intall discoverer desktop
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Sami Malik
[email protected]

Itunes 6 does not access the cddb gracenote data base any more

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Shaun Bromley wrote:
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It's can be done this way but it doesn't mean it is supposed to be done this way.
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I never uncheck anything.
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Since Apple's data base has been accessed by burglars, why can't Apple track serial numbers?

If Apple's data base is accessed by people like this, why can't the same data base be used to track ownership? MOst Apple users sign on to itunes and share their system information. Would it not make sense to share the serial numbers with a reporting system?
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<Edited By Host>

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ORA-00900 when there is huge quantity access to Data Base

Hi
I have some Java programs which access to the same Data Base Oracle 11gR2 from diferent computers and diferent Operative System.
in a normal execution everything is working but when I want to test the 'stress' in the data base I execute many concurrent programs. The problem is that when I execute too many programs the data base answer me 'java.sql.SQLException: ORA-00900: sentencia SQL no valida' (I´m sorry the spanish expresion, I don´t know the english correspondence)
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My computer hard drive crashed and was recently replaced and a fresh new install of Windows 7 was done. Also my service provider has change and I no longer use the airport as my wireless router. I have all my data on the time capsule however I am unable to access it. I tried downloading airport utility for windows but its not detecting my time capsule. I am connecting the time capsule to my computer using the usb cable. Any suggestions?

I am connecting the time capsule to my computer using the usb cable. Any suggestions?
That is not a valid method of connecting.. the TC is a network device.. you cannot use USB to it.
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Hi everyone,
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Bruce

duplicate post
Continue in other thread
Message Edited by smercurio_fc on 11-14-2008 09:10 AM

Multiple Users Can't Access Time Capsule Data

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Time Machine Troubleshooting Problems

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Data base access time

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