Best way to write the following query

Hi ,
I've the following table structures and data..
And i've written the query to get the records which are greater than BBB-
But could you please hint me to write in simpler way.
create table obj (ob_id )
as select 1 from dual union all
select 2 from dual union all
select 3 from dual union all
select 4 from dual union all
select 5 from dual union all
select 6 from dual
create table og_dt (or_id , rt_cd,rt_ct_cd)
AS SELECT 1 ,'B','BRID' FROM DUAL UNION ALL
   SELECT 1 ,'B','BRD' FROM DUAL UNION ALL
   SELECT 2 ,'BB-','ACR' FROM DUAL UNION ALL
   SELECT 2 ,'BB-','AQCR' FROM DUAL UNION ALL
   SELECT 3 ,'BBB','QYRE' FROM DUAL UNION ALL
   SELECT 4 ,'BB+','TUR' FROM DUAL UNION ALL
   SELECT 5 ,'BBB-','KUYR' FROM DUAL
create table rt_srt (srt_ord,rt_cd,rt_ct_cd)
as select 50 ,'B','VID' FROM DUAL UNION ALL
   SELECT 50 ,'B','BRD' FROM DUAL UNION ALL
   SELECT 40 ,'BB-','ACR' FROM DUAL UNION ALL
   SELECT 41 ,'BB-','AQCR' FROM DUAL UNION ALL
   SELECT 30 ,'BBB','QYRE' FROM DUAL UNION ALL
   SELECT 33 ,'BB+','TUR' FROM DUAL UNION ALL
   SELECT 20 ,'BBB-','KUYR' FROM DUAL
select distinct
   from obj,og_dt,rt_srt
where obj.ob_id=og_dt.or_id
and og_dt.rt_cd = rt_srt.rt_cd
and og_dt.rt_ct_cd=rt_srt.rt_ct_cd
and rt_srt.srt_ord > all (select rt_srt.srt_ord from rt_srt
where rt_cd='BBB-' I've used the table rt_srt twise in the above query
Could you please hint to write it in the simple way.
Thank you

Here are execution plans for 3 possible solutions (incuding one you posted). Second & third solutions assume rt_srt.srt_ord is not null:
SQL> explain plan for
2 select distinct *
3    from obj,
4          og_dt,
5          rt_srt
6    where obj.ob_id = og_dt.or_id
7      and og_dt.rt_cd = rt_srt.rt_cd
8      and og_dt.rt_ct_cd = rt_srt.rt_ct_cd
9      and rt_srt.srt_ord > all (
10                                select rt_srt.srt_ord
11                                  from rt_srt
12                                  where rt_cd = 'BBB-'
13                               )
14 /
Explained.
SQL> @?\rdbms\admin\utlxpls
PLAN_TABLE_OUTPUT
Plan hash value: 3210303028
| Id | Operation              | Name   | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT       |        |     7 |   504 |    16 (25)| 00:00:01 |
|   1 | HASH UNIQUE           |        |     7 |   504 |    16 (25)| 00:00:01 |
|   2 |   MERGE JOIN ANTI NA   |        |     7 |   504 |    15 (20)| 00:00:01 |
|   3 |    SORT JOIN           |        |     7 |   385 |    11 (19)| 00:00:01 |
|* 4 |     HASH JOIN          |        |     7 |   385 |    10 (10)| 00:00:01 |
|* 5 |      HASH JOIN         |        |     7 |   238 |     7 (15)| 00:00:01 |
PLAN_TABLE_OUTPUT
|   6 |       TABLE ACCESS FULL| OBJ    |     6 |    78 |     3   (0)| 00:00:01 |
|   7 |       TABLE ACCESS FULL| OG_DT |     7 |   147 |     3   (0)| 00:00:01 |
|   8 |      TABLE ACCESS FULL | RT_SRT |     7 |   147 |     3   (0)| 00:00:01 |
|* 9 |    SORT UNIQUE         |        |     1 |    17 |     4 (25)| 00:00:01 |
|* 10 |     TABLE ACCESS FULL | RT_SRT |     1 |    17 |     3   (0)| 00:00:01 |
Predicate Information (identified by operation id):
   4 - access("OG_DT"."RT_CD"="RT_SRT"."RT_CD" AND
PLAN_TABLE_OUTPUT
              "OG_DT"."RT_CT_CD"="RT_SRT"."RT_CT_CD")
   5 - access("OBJ"."OB_ID"="OG_DT"."OR_ID")
   9 - access("RT_SRT"."SRT_ORD"<="RT_SRT"."SRT_ORD")
       filter("RT_SRT"."SRT_ORD"<="RT_SRT"."SRT_ORD")
10 - filter("RT_CD"='BBB-')
Note
   - dynamic sampling used for this statement (level=2)
31 rows selected.
SQL> explain plan for
2 select distinct *
3    from obj,
4          og_dt,
5          rt_srt
6    where obj.ob_id = og_dt.or_id
7      and og_dt.rt_cd = rt_srt.rt_cd
8      and og_dt.rt_ct_cd = rt_srt.rt_ct_cd
9      and rt_srt.srt_ord > (
10                            select max(rt_srt.srt_ord)
11                              from rt_srt
12                              where rt_cd = 'BBB-'
13                           )
14 /
Explained.
SQL> @?\rdbms\admin\utlxpls
PLAN_TABLE_OUTPUT
Plan hash value: 3391900174
| Id | Operation              | Name   | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT       |        |     1 |    55 |    14 (15)| 00:00:01 |
|   1 | HASH UNIQUE           |        |     1 |    55 |    14 (15)| 00:00:01 |
|* 2 |   HASH JOIN            |        |     1 |    55 |    10 (10)| 00:00:01 |
|   3 |    MERGE JOIN CARTESIAN|        |     2 |    68 |     6   (0)| 00:00:01 |
|* 4 |     TABLE ACCESS FULL | RT_SRT |     1 |    21 |     3   (0)| 00:00:01 |
|   5 |      SORT AGGREGATE    |        |     1 |    17 |            |          |
PLAN_TABLE_OUTPUT
|* 6 |       TABLE ACCESS FULL| RT_SRT |     1 |    17 |     3   (0)| 00:00:01 |
|   7 |     BUFFER SORT        |        |     6 |    78 |     3   (0)| 00:00:01 |
|   8 |      TABLE ACCESS FULL | OBJ    |     6 |    78 |     3   (0)| 00:00:01 |
|   9 |    TABLE ACCESS FULL   | OG_DT |     7 |   147 |     3   (0)| 00:00:01 |
Predicate Information (identified by operation id):
   2 - access("OBJ"."OB_ID"="OG_DT"."OR_ID" AND
              "OG_DT"."RT_CD"="RT_SRT"."RT_CD" AND
PLAN_TABLE_OUTPUT
              "OG_DT"."RT_CT_CD"="RT_SRT"."RT_CT_CD")
   4 - filter("RT_SRT"."SRT_ORD"> (SELECT MAX("RT_SRT"."SRT_ORD") FROM
              "RT_SRT" "RT_SRT" WHERE "RT_CD"='BBB-'))
   6 - filter("RT_CD"='BBB-')
Note
   - dynamic sampling used for this statement (level=2)
30 rows selected.
SQL> explain plan for
2 select distinct obj.*,
3                   og_dt.*,
4                   rt_srt.srt_ord,
5                   rt_srt.rt_cd,
6                   rt_srt.rt_ct_cd
7    from obj,
8          og_dt,
9          (
10           select t.*,
11                   max(case rt_cd when 'BBB-' then srt_ord end) over() max_srt_ord
12             from rt_srt t
13          ) rt_srt
14    where obj.ob_id = og_dt.or_id
15      and og_dt.rt_cd = rt_srt.rt_cd
16      and og_dt.rt_ct_cd = rt_srt.rt_ct_cd
17      and rt_srt.srt_ord > max_srt_ord
18 /
Explained.
SQL> @?\rdbms\admin\utlxpls
PLAN_TABLE_OUTPUT
Plan hash value: 998396165
| Id | Operation             | Name   | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT      |        |     7 |   476 |    11 (19)| 00:00:01 |
|   1 | HASH UNIQUE          |        |     7 |   476 |    11 (19)| 00:00:01 |
|* 2 |   HASH JOIN           |        |     7 |   476 |    10 (10)| 00:00:01 |
|* 3 |    HASH JOIN          |        |     7 |   238 |     7 (15)| 00:00:01 |
|   4 |     TABLE ACCESS FULL | OBJ    |     6 |    78 |     3   (0)| 00:00:01 |
|   5 |     TABLE ACCESS FULL | OG_DT |     7 |   147 |     3   (0)| 00:00:01 |
PLAN_TABLE_OUTPUT
|* 6 |    VIEW               |        |     7 |   238 |     3   (0)| 00:00:01 |
|   7 |     WINDOW BUFFER     |        |     7 |   147 |     3   (0)| 00:00:01 |
|   8 |      TABLE ACCESS FULL| RT_SRT |     7 |   147 |     3   (0)| 00:00:01 |
Predicate Information (identified by operation id):
   2 - access("OG_DT"."RT_CD"="RT_SRT"."RT_CD" AND
              "OG_DT"."RT_CT_CD"="RT_SRT"."RT_CT_CD")
   3 - access("OBJ"."OB_ID"="OG_DT"."OR_ID")
PLAN_TABLE_OUTPUT
   6 - filter("RT_SRT"."SRT_ORD">"MAX_SRT_ORD")
Note
   - dynamic sampling used for this statement (level=2)
27 rows selected.
SQL> SY.
Edited by: Solomon Yakobson on May 7, 2012 4:46 PM

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SELECT   au_subtyp1.au_id_k,
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|   0 | SELECT STATEMENT         |           |     1 |    91 |       | 33265   (2)| 00:06:40 |
|* 1 | FILTER                  |           |       |       |       |            |          |
|   2 |   HASH GROUP BY          |           |     1 |    91 |       | 33265   (2)| 00:06:40 |
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|* 9 |     TABLE ACCESS FULL    | AU_SUBTYP | 1404K|    46M|       | 5336   (2)| 00:01:05 |
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Plan hash value: 4039566059
| Id | Operation                | Name      | Rows | Bytes |TempSpc| Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT         |           | 2809K|   168M|       | 40034   (1)| 00:08:01 |
|* 1 | VIEW                    |           | 2809K|   168M|       | 40034   (1)| 00:08:01 |
|* 2 |   WINDOW SORT PUSHED RANK|           | 2809K|   133M|   365M| 40034   (1)| 00:08:01 |
|* 3 |    TABLE ACCESS FULL     | AU_SUBTYP | 2809K|   133M|       | 5345   (2)| 00:01:05 |
Predicate Information (identified by operation id):
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Vijay

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Thanks for your reply. I am running this on our Test environment as I don't want to run this on Production environment now. The test environment holds 2809605 records (2 Million).
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physical write total multi block requests     69
physical writes     2139
physical writes direct     2139
physical writes direct temporary tablespace     2139
physical writes non checkpoint     2139
recursive calls     19
recursive cpu usage     1
session cursor cache hits     1
session logical reads     52162
sorts (memory)     2
sorts (rows)     760
table scan blocks gotten     23856
table scan rows gotten     2809607
table scans (short tables)     1
user I/O wait time     1
user calls     11
workarea executions - onepass     1
workarea executions - optimal     9
Second Query
CPU used by this session     1197
CPU used when call started     1197
Cached Commit SCN referenced     21393
DB time     1201
OS Involuntary context switches     8684
OS Page reclaims     21769
OS System time used     14
OS User time used     1183
OS Voluntary context switches     50
SQL*Net roundtrips to/from client     9
bytes received via SQL*Net from client     767
bytes sent via SQL*Net to client     15745
calls to get snapshot scn: kcmgss     17
consistent gets     23871
consistent gets from cache     23871
db block gets     16
db block gets from cache     16
enqueue releases     25
enqueue requests     25
enqueue waits     1
execute count     2
free buffer requested     1
ges messages sent     1
global enqueue get time     1
global enqueue gets sync     25
global enqueue releases     25
no work - consistent read gets     23856
opened cursors cumulative     2
parse count (hard)     1
parse count (total)     2
parse time elapsed     1
physical read IO requests     27
physical read bytes     6635520
physical read total IO requests     27
physical read total bytes     6635520
physical read total multi block requests     27
physical reads     810
physical reads direct     810
physical reads direct temporary tablespace     810
physical write IO requests     117
physical write bytes     24584192
physical write total IO requests     117
physical write total bytes     24584192
physical write total multi block requests     117
physical writes     3001
physical writes direct     3001
physical writes direct temporary tablespace     3001
physical writes non checkpoint     3001
recursive calls     25
session cursor cache hits     1
session logical reads     23887
sorts (disk)     1
sorts (memory)     2
sorts (rows)     2810365
table scan blocks gotten     23856
table scan rows gotten     2809607
table scans (short tables)     1
user I/O wait time     2
user calls     11
workarea executions - onepass     1
workarea executions - optimal     5Thanks,
Vijay
Edited by: Vijayaraghavan Krishnan on Nov 28, 2012 11:17 AM
Edited by: Vijayaraghavan Krishnan on Nov 28, 2012 11:19 AM

Best way to write SELECT statement

Hi,
I am selecting fields from one table, and need to use two fields on that table to look up additional fields in two other tables.
I do not want to use a VIEW to do this.
I need to keep all records in the original selection, yet I've been told that it's not good practice to use LEFT OUTER joins. What I really need to do is multiple LEFT OUTER joins.
What is the best way to write this? Please reply with actual code.
I could use 3 internal tables, where the second 2 use "FOR ALL ENTRIES" to obtain the additional data. But then how do I append the 2 internal tables back to the first? I've been told it's bad practice to use nested loops as well.
Thanks.

Hi,
in your case having 2 internal table to update the one internal tables.
do the following steps:
*get the records from tables
sort: itab1 by key field, "Sorting by key is very important
      itab2 by key field. "Same key which is used for where condition is used here
loop at itab1 into wa_tab1.
read itab2 into wa_tab2     " This sets the sy-tabix
       with key key field = wa_tab1-key field
       binary search.
if sy-subrc = 0.              "Does not enter the inner loop
    v_kna1_index = sy-tabix.
    loop at itab2 into wa_tab2 from v_kna1_index. "Avoiding Where clause
      if wa_tab2-keyfield <> wa_tab1-key field. "This checks whether to exit out of loop
        exit.
      endif.
****** Your Actual logic within inner loop ******
   endloop. "itab2 Loop
endif.
endloop. " itab1 Loop
Refer the link also you can get idea about the Parallel Cursor - Loop Processing.
http://wiki.sdn.sap.com/wiki/display/Snippets/CopyofABAPCodeforParallelCursor-Loop+Processing
Regards,
Dhina..

Whats the best way to get the server name in a servlet deployed to a cluster?

          Hi,
          I have a servlet in a web application that is deployed to a cluster, just
          wondering what is the best way to get the name of the node that the server is
          running on at run time??
          Thanks


          Please try to modify the following code and test for your purpose: (check Weblogic
          class document for detail)
          import javax.naming.*;
          import weblogic.jndi.*;
          import weblogic.management.*;
          import weblogic.management.configuration.*;
          import weblogic.management.runtime.*;
          MBeanHome home = null;
               try{
                    //The Environment class represents the properties used to create
                         //an initial Context. DEfault constructor constructs an Environment
                         //with default properties, that is, with a WebLogic initial context.
                         //If unset, the properties for principal and credentials default to
                         //guest/guest, and the provider URL defaults to "t3://localhost:7001".
                         Environment env = new Environment();
                         //Sets the Context.PROVIDER_URL property value to the value of
                         //the argument url.
                         if(admin_url!=null){
                              env.setProviderUrl(admin_url);
                              //Sets the Context.SECURITY_PRINCIPAL property to the value of
                              //the argument principal.
                              env.setSecurityPrincipal(username);
                              //Sets the value of the Context.SECURITY_CREDENTIAL property to
                              //the value of the argument cedentials
                              env.setSecurityCredentials(password);
                              //Returns an initial context based on the properties in an Environment.
                              ctx = env.getInitialContext();
                         }else ctx = new InitialContext();
                         home = (MBeanHome) ctx.lookup(MBeanHome.ADMIN_JNDI_NAME);
                         ctx.close(); //free resource
                         // or if looking up a specific MBeanHome
                         //home = (MBeanHome) ctx.lookup(MBeanHome.JNDI_NAME + "." + serverName);
                         DomainMBean dmb = home.getActiveDomain(); //Get Active Domain
                         ServerMBean[] sbeans = dmb.getServers(); //Get all servers
                         if(sbeans!=null){
                              for(int s1=0; s1<sbeans.length; s1++){
                                   String privip = sbeans[s1].getListenAddress();
                              sbeans[s1].getName();
                         sbeans[s1].getListenPort();
                                             WebServerMBean wmb = sbeans[s1].getWebServer();
               }catch(Exception ex){
          "Gao Jun" <[email protected]> wrote:
          >Is there any sample code? Thanks
          >
          >Best Regards,
          >Jun Gao
          >
          >"Xiang Rao" <[email protected]> wrote in message
          >news:[email protected]...
          >>
          >> Sure. You can use the Weblogic management APIs to query ServerBean.
          >>
          >>
          >> "Me" <[email protected]> wrote:
          >> >
          >> >Thanks for your reply, i was hoping to find a better way for example
          >> >a class in
          >> >weblogic API.
          >> >
          >> >Thanks
          >> >
          >> >"Xiang Rao" <[email protected]> wrote:
          >> >>
          >> >>Physical: InetAddress.getLocalHost().getHostName()
          >> >>Weblogic: System.getProperty("weblogic.Name");
          >> >>
          >> >>
          >> >>"Me" <[email protected]> wrote:
          >> >>>
          >> >>>Hi,
          >> >>> I have a servlet in a web application that is deployed to a
          >cluster,
          >> >>>just
          >> >>>wondering what is the best way to get the name of the node that
          >the
          >> >>server
          >> >>>is
          >> >>>running on at run time??
          >> >>>
          >> >>>Thanks
          >> >>
          >> >
          >>
          >
          >

Best way to spool DYNAMIC SQL query to file from PL/SQL

Best way to spool DYNAMIC SQL query to file from PL/SQL [Package], not SqlPlus
I'm looking for suggestions on how to create an output file (fixed width and comma delimited) from a SELECT that is dynamically built. Basically, I've got some tables that are used to define the SELECT and to describe the output format. For instance, one table has the SELECT while another is used to defined the column "formats" (e.g., Column Order, Justification, FormatMask, Default value, min length, ...). The user has an app that they can use to customize the output...which leaving the gathering of the data untouched. I'm trying to keep this formatting and/or default logic out of the actual query. This lead me into a problem.
Example query :
SELECT CONTRACT_ID,PV_ID,START_DATE
FROM CONTRACT
WHERE CONTRACT_ID = <<value>>Customization Table:
CONTRACT_ID : 2,Numeric,Right
PV_ID : 1,Numeric,Mask(0000)
START_DATE : 3,Date,Mask(mm/dd/yyyy)The first value is the kicker (ColumnOrder) as well as the fact that the number of columns is dynamic. Technically, if I could use SqlPlus...then I could just use SPOOL. However, I'm not.
So basically, I'm trying to build a generic routine that can take a SQL string execute the SELECT and map the output using data from another table to a file.
Any suggestions?
Thanks,
Jason

You could build the select statement within PL/SQL and open it using a cursor variable. You could write it to a file using the package 'UTL_FILE'. If you want to display the output using SQL*Plus, you could have an out parameter as a ref cursor.

What is the best way to mimic the data from production to other server?

Hi,
here we user streams and advanced replication to send the data for 90% of tables from production to another production database server. if one goes down can use another one. is there any other best option rather using the streams and replication? we are having lot of problems with streams these days they keep break and get calls.
I heard about data guard but dont know what is use of it? please advice the best way to replicate the data.
Thanks a lot.....

RAC, Data Guard. The first one is active-active, that is, you have two or more nodes accessing the same database on shared storage and you get both HA and load balancing. The second is active-passive (unless you're on 11.2 with Active Standby or Snapshot Standby), that is one database is primary and the other is standby, which you normally cannot query or modify, but to which you can quickly switch in case primary fails. There's also Logical Standby - it's based on Streams and generally looks like what you seem to be using now (sort of.) But it definitely has issues. You can also take a look at GoldenGate or SharePlex.

Iphone 4s coming friday, what is the best way to get the notes content from iphone 4 to 4s without doing a restore? i want the new phone to be totally new but not sure how to get notes content across.

What is the best way to get the notes content from iphone 4 to 4s without doing a restore? i want the new phone to be totally new but not sure how to get notes content across. If I do a restore as I have when previously from one iphone to another it has shown (in settings, usage) the cumulative usage from previous phones so all the hours of calls on all previous iphones will be displayed even though its brand new. Anyone know how I can get my notes (from standard iphone notes app) to my new iphone 4s without restoring from previous iphone 4. Thanks for any help offered.

First, if you haven't updated to iTunes 10.5, please update now as you will need it for the iPhone 4S and iOS 5.
Once you're done installing iTunes 10.5, open it. Connect your iPhone to iTunes using the USB cable. Once your iPhone pops up right click on it. For example: an iPhone will appear and it will say "Ryan's iPhone."
Right click on it and select "Backup" from the dropdown menu. It will start backing up. This should backup your notes.
Please tell me if you have any problems with backing up.
Once you backup and get your iPhone 4S, you must follow these steps. If you don't follow these steps, you will not be able to get your notes on your new iPhone 4S.
Open up iTunes again then right click on your device (iPhone 4S). Once you do you will see a dropdown menu. It will say "Restore from Backup..." Select this and it'll ask for a backup, select it from the dropdown menu. For example "Ryan's iPhone - October 12, 2011." Pick that and it will restore to your backup. Do this when you get your iPhone 4S so you will not lose anything. Even though you're restoring, you're getting back, since you're getting the previous settings, notes, contacts, mail and other settings from your old iPhone. You'll still have Siri though! So, restore when you first get it. Also frequently backup your device, as it will be worth it. You can restore from a backup if something goes wrong or save your data for a future update.
Once you do that, you should have your notes on your new iPhone 4S and iOS 5.
Please tell me if you need any help.
I hoped I answered your questions and solved your problem!

Best way to write the following query

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