Select statement with LIMIT

I m trying to find if LIMIT is a part of the select statement and if works like
set rowcount 1 in sybase....if anyone can post the generic select statement with LIMIT in it that would be great!
any help or input will be greatly appreciated
Thanks!

Hallo,
i don't know sybase, but it is probably rownum
select * from scott.emp
where rownum < 3
Regards
Dmytro

Similar Messages

A Select statement with Appending table statement in it.

Hi,
How can I use a select statement with a <Appening table> statement in it.
SELECT DISTINCT <field Name>
                FROM <DB table name>
                APPENDING TABLE <itab>
                WHERE <fieldname> EQ <Itab1-fieldname>
                  AND <fieldname> EQ <itab2-fieldname>.
Can I use the above select statement.If I'm using this...how this works?
Regards
Dharmaraju

Hi, Dharma Raju Kondeti.
I found this in the SAP online help, hope this can help you.
Specifying Internal Tables
When you read several lines of a database table, you can place them in an internal table. To do this, use the following in the INTO clause:
SELECT ... INTO|APPENDING [CORRESPONDING FIELDS OF] TABLE <itab>
                          [PACKAGE SIZE <n>] ...
The same applies to the line type of <itab>, the way in which the data for a line of the database table are assigned to a table line, and the CORRESPONDING FIELDS addition as for flat work areas (see above).
The internal table is filled with all of the lines of the selection. When you use INTO, all existing lines in the table are deleted. When you use APPENDING; the new lines are added to the existing internal table <itab>. With APPENDING, the system adds the lines to the internal table appropriately for the table type. Fields in the internal table not affected by the selection are filled with initial values.
If you use the PACKAGE SIZE addition, the lines of the selection are not written into the internal table at once, but in packets. You can define packets of <n> lines that are written one after the other into the internal table. If you use INTO, each packet replaces the preceding one. If you use APPENDING, the packets are inserted one after the other. This is only possible in a loop that ends with ENDSELECT. Outside the SELECT loop, the contents of the internal table are undetermined. You must process the selected lines within the loop.
Regards,
feng.
Edited by: feng zhang on Feb 21, 2008 10:20 AM

How to avoid data repetation when using select statements with innerjoin

how to avoid data repetation when using select statements with innerjoin.
thanks in advance,
satheesh

you can use a query like this...
SELECT DISTINCT
         frg~prc_group1                  "Product Group 1
         frg~prc_group2                  "Product Group 2
         frg~prc_group3                  "Product Group 3
         frg~prc_group4                  "Product Group 4
         frg~prc_group5                  "Product Group 5
         prc~product_id                  "Product ID
         txt~short_text                  "Product Description
UP TO 10 ROWS
INTO TABLE l_i_data
FROM
Joining CRMM_PR_SALESG and
COMM_PR_FRG_ROD
crmm_pr_salesg AS frg
INNER JOIN comm_pr_frg_rod AS prd
ON frgfrg_guid = prdfragment_guid
Joining COMM_PRODUCT and
COMM_PR_FRG_ROD
INNER JOIN comm_product AS prc
ON prdproduct_guid = prcproduct_guid
Joining COMM_PRSHTEXT and
COMM_PR_FRG_ROD
INNER JOIN comm_prshtext AS txt
ON prdproduct_guid = txtproduct_guid
WHERE frg~prc_group1 IN r_zprc_group1
   AND frg~prc_group2 IN r_zprc_group2
   AND frg~prc_group3 IN r_zprc_group3
   AND frg~prc_group4 IN r_zprc_group4
   AND frg~prc_group5 IN r_zprc_group5.
reward it it helps
Edited by: Apan Kumar Motilal on Jun 24, 2008 1:57 PM

SELECT statement with 'IN'

Hi,
If SELECT statement has IN in the where clause, does that use the index?
For example,
SELECT t1 f2 f4 from ztest
WHERE
              fid IN     s_id    AND
              doctype     IN s_doctype AND
              year     IN s_year    .
What is the other option to optimize the SELECT with IN?
Thanks & regards,
Yogita

Moderator message - Please search before asking - post locked
Rob

How to use a select statement with chinese characters?

I am currently developing a java servlet<using tomcat 4.x> which allows me to use select statement to retrieve results from the Microsoft SQL Server 2000 database. I am using a simple form to get the parameter for querying. The main problem i'm facing is that there are chinese information in the SQL database, but i can't retrieve it through the sql statement with the chinese characters input<thru the form with the help of NJ STAR>in the WHERE condition. When i execute the statement, it returns me no results even though the rows are present in the database.
Does anyone have the solution to using chinese words in the WHERE clause of the select statement to retrieve results with columns which contains chinese characters? Please help me. Thanks everyone. :)
PS: when i cut and paste those characters in the sql database and paste onto java.. it is ??? in questionmarks.. but when i paste them into excel 2000.. its shown as chinese chars again..
please heelppp~~

Greetings,
PS: when i cut and paste those characters in thesql
database and paste onto java.. it is ??? in
questionmarks.. but when i paste them into excelThis is why the SELECT is not returning any results.
You need to set the character encoding set on your
statement and parameters for the characters to be
properly translated. Refer to the charsetName
parameter in the String class constructor in your API
docs and also to
$JDK_DOCS/guide/intl/encoding.doc.html in your JDK
documentation.
2000.. its shown as chinese chars again..Because Office programs are performing the same kind
of character translation with the appropriate MS APIs.
please heelppp~~Regards,
Tony "Vee Schade" Cookis it possible for you to show me some coding examples? i don't really understand what is to be done in order to set the char set and what does it really do.. tried reading up but still dun understand.. :(
pardon my shallow knowledge of java..
ok..
The thing is when i used an insert statement with chinese characters of GBK format hardcoded into the java servlet and then i use the insert statement to insert the chars into the database, it cannot be seen as a chinese word when i off the NJStar. and then it can be searched out with my current form of servlet.. below is my coding of the servlet..
note: i've set my html file to charset = GBK
//prototype of Search engine...
//workable for GBK input and output...
import java.io.*;
import java.io.OutputStream;
import java.io.IOException;
import javax.servlet.http.*;
import javax.servlet.ServletException;
import java.util.*;
import java.sql.*;
import java.nio.charset.Charset;
public class SearchBeta extends HttpServlet {
     private Vector musicDetails = new Vector();
     private String query = "";
     public void service (HttpServletRequest req, HttpServletResponse res) throws IOException, ServletException, UnsupportedEncodingException {
          query = req.getParameter ("T1");
          System.out.println("before:"+query);
          String type = req.getParameter ("D1");//type
          query = req.getParameter ("T1");
          //query = "��";
          System.out.println("after:"+query);
          getResults(type,query);
          System.out.println("locale = :"+req.getLocale());
          res.setContentType ("text/html;charset=GBK");
          PrintWriter out = res.getWriter();
          out.println("<html>");
          out.println("<head>");
          out.println("<body bgcolor = \"black\">");
          out.println("<font face = \"comic sans ms\" color=\"Cornsilk\">");
          if (query.length()==0)
               out.println ("Please key in your search query.");
          else if (musicDetails.size()==0)
               out.println ("Sorry, no results matching your search can be found.");
          else {
               out.println("<center>");
               out.println("<table cellspacing = \"50\">");
               int i = 0;
               //Display the details of the music
               while (i<musicDetails.size()) {
                    Results details = (Results)musicDetails.get(i);
                    String dbArtist = "";
                    String dbAlbum = "";
                    String dbTitle = "";
                    String dbCompany = "";
                    dbAlbum = details.getAlbum();
                    dbTitle = details.getTitle();
                    dbCompany = details.getCompany();
                    dbArtist = details.getArtist();
                    try{
                         dbAlbum = new String(dbAlbum.getBytes("ISO-8859-1"),"GBK");
                         dbTitle = new String(dbTitle.getBytes("ISO-8859-1"),"GBK");
                         dbCompany = new String(dbCompany.getBytes("ISO-8859-1"),"GBK");
                         dbArtist = new String(dbArtist.getBytes("ISO-8859-1"),"GBK");//correct translation.
                    catch(UnsupportedEncodingException e){
                         System.out.print(e);
                         e.printStackTrace();
                    String dbImage_loc = details.getImage();
                    out.println("<tr>");
                         out.println("<td><table>");
                              out.println("<img src=C:\\Program Files\\Apache Group\\Tomcat 4.1\\webapps\\examples\\ThumbNails\\"+dbImage_loc+">");
                         out.println("<tr>");
                              out.println("<th><font color=\"violet\"> Artist: </font></th>");
                              out.println("<td><font color=\"Cornsilk\">"+dbArtist+"</font></td>");
                         out.println("</tr>");
                         out.println("<tr>");
                              out.println("<th><font color=\"violet\"> Title: </font></th>");
                              out.println("<td><font color=\"Cornsilk\">"+dbTitle+"</font></td>");
                         out.println("</tr>");
                         out.println("<tr>");
                              out.println("<th><font color=\"violet\"> Company: </font></th>");
                              out.println("<td><font color=\"Cornsilk\">"+dbCompany+"</font></td>");
                         out.println("</tr>");
                         System.out.println("album: "+ dbAlbum);
                         out.println("<tr>");
                              out.println("<th><font color=\"violet\"> Album: </font></th>");
                              out.println("<td><font color=\"Cornsilk\">"+dbAlbum+"</font></td>");
                         out.println("</tr>");
                         System.out.println("company: "+ dbCompany);
                         out.println("</table></td>");
                    out.println("</tr>");
                    i++;
               out.println("</table>");
               out.println("</center>");
          out.println("</font>");
          out.println("</body>");
          out.println("</head>");
          out.println("</html>");
          out.close();
          //to remove all the elements from the Vector
          musicDetails.removeAllElements();
     //get Searched Music Details and store in Results object which is stored in musicDetails vector
     public void getResults (String type, String searchQuery) {
          try {
               Class.forName ("com.microsoft.jdbc.sqlserver.SQLServerDriver");
               Connection con = DriverManager.getConnection("jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=music","sa","kokkeng");
               Statement stmt = con.createStatement();
               String query = "SELECT * FROM MusicDetails WHERE "+type+" = '"+searchQuery+"'";
               ResultSet rs = stmt.executeQuery(query);
               while (rs.next()) {
                    String artist = rs.getString("Artist");
                    String title = rs.getString("Song");
                    String company = rs.getString("Company");
                    String album = rs.getString("Album");
                    String image_loc = rs.getString("Image");
                    Results details = new Results (artist,title,company,album,image_loc);
                    musicDetails.add(details);
               stmt.close();
               con.close();
          catch (Exception e) {
               System.out.println(e.getMessage());
               e.printStackTrace();
with the above servlet i created, i can search out the data in the database which i've inserted through the insert statement. I still can't search for things i've keyed into the database directly using NJStar..
thank you so much for helping.. really hope any one else who knows the answer to this will reply too... thank you all so much...
-KK

Incorrect SELECT statement with single quotes

I am getting the following error trying to select a value from a database:
SQLException caught: [Microsoft][ODBC Microsoft Access Driver] Syntax error (missing operator) in query expression 'mod='Payroll''. Couldn't load driver:[Microsoft][ODBC Microsoft Access Driver] Syntax error (missing operator) in query expression 'mod='Payroll''.
Here is the select statement code:
PreparedStatement ps = con.prepareStatement("SELECT username FROM experts WHERE mod='"+mod+"'");
I have tried all kinds of variations with the quotes, and single quotes but still get the same error...I know I'm on the right track but I can't seem to spot the error and was hoping someone else could??
thanks in advance,
chuk

Hi,
I tried that and now I get an even stranger syntax error which says "Syntax error (missing operator) in query expression 'mod=Pa_RaM000'."
any ideas?

How to speed a select statement with the NOT EXISTS where condition ?

Hi all,
I created a view : create or replace view view_name as select * from table_1,table_2 where join_condition and some conditions.
Now I have added in the view "where" clause two NOT EXISTS conditions based on one another different table respectively.
Before I added these two conditions the response time was fast ; but after I added these two conditions then the response time deteriorated.
So how to optimize the select statement ? Hints and so on ...
Thank you very much indeed
Message was edited by:
andrianiaina

Just run the script :
SQL> explain plan for select * from dual;
Explained.
SQL> @$ORACLE_HOME/rdbms/admin/utlxpls.sql
PLAN_TABLE_OUTPUT
| Id | Operation            | Name       | Rows | Bytes | Cost |
|   0 | SELECT STATEMENT     |             |       |       |       |
|   1 | TABLE ACCESS FULL   | DUAL        |       |       |       |
Note: rule based optimization
9 rows selected.
SQL>Nicolas.

Join a SELECT-Statement with a INDEX

can I force a SELECT-Statement to use a certain Table-INDEX?
f.e.
select * from table a
where a.key like '%p'
..forced index a.idx.--

Yes. You can.
Use SQL hint.
select /*+ index (tablename indexname) */.
If the index is usable-Oracle will use it. If not -Oracle will see it as a remark.

Generating SQL SELECT statement with Schema

I develop a 3rd-party application that connects to various
databases via ODBC. Our program generates the SQL statement
so that the user does not have to. When connecting to oracle the
user often gets the error message: ORA-00942: table or view does
not exist.
To work around this our tech support department has tells the
customer to enter in the Schema name before the table name.
Thus,
SELECT ItemNo from Item
becomes
SELECT ItemNo from MySchema.Item
Is there a way that I can query the Data Source to find out
the Schema name so that our program can put in in the
statement. Is there a SQLGetInfo call I can make to get
this information?
Or, should I have the Server specified in the connection
string? For SQL Server we use SQLGetPrivateProfileString to
obtain the server name and then include it in the connection
string: SRVR=<servername>
Unfortunately, if this is the case the keyword is different
depending on the ODBC Driver involved. "Server" for Microsoft.
"SRVR" for Intersolv. "ServerName" for Oracle.
Note: We do not have Oracle in-house to test with. I'm
wondering if we could get Oracle for free for development
purposes.
Any and all information would be greatly appreciated.

Thanks for the tip. I just finished downloading Oracle.
One user is able to successfully view the database with the
statement:
SELECT ItemNo from Item
But if another user tries it he gets the "table or view not
found" message. Changing the statement as follows will allow
the 2nd user to view the database:
SELECT ItemNo from "MAXIMO".Item
I want my application to query the database via ODBC for the
"MAXIMO" string so I can create the correct SQL statement.
Thanks!
<<Are you trying to view tables from a non-default schema?>>I don't know. You would know better than me from my
description.

Dynamic select-statement with ranges

Good morning experts,
I just wanted to know if this is possible:
I had a report with a selection-screen where I can enter a table-name and one ore more filed-names (separated by ;).
After that, I create a table like my entered (for example MARA)
CREATE DATA gt_table TYPE TABLE OF (p_tab).
ASSIGN gt_table->* TO <gt_table>.
Then I split my entered fields (at and for each filed I made a selection (with function COMPLEX_SELECTIONS_DIALOG).
Result of this is for each field a range-tab which I write in a new table - first column is the name of the field, second column is a range-tab:
TYPES: BEGIN OF t_ranges,
          sign TYPE tkeppllevs-sign,
          opt TYPE tkeppllevs-opt,
          low TYPE rsdslow,
          high TYPE rsdslow,
        END OF t_ranges.
DATA: BEGIN OF gs_conditions,
        fieldname TYPE string,
        ranges    TYPE TABLE OF t_ranges.
DATA: END OF gs_conditions.
DATA: gt_conditions LIKE TABLE OF gs_conditions.
Now I want to make a select on the entered table (MARA).
So I make a loop on my gt_conditions:
LOOP AT gt_conditions INTO gs_conditions.
l_index = sy-tabix.
CONCATENATE 'gt_conditions[' l_index ']-ranges' INTO l_condition.
CONDENSE l_condition NO-GAPS.
CONCATENATE gs_conditions-fieldname 'IN' l_condition INTO lt_condition SEPARATED BY space.
IF sy-tabix > 1.
    CONCATENATE 'AND' lt_condition INTO lt_condition SEPARATED BY space.
ENDIF.
APPEND lt_condition.
ENDLOOP.
If I look at it after the loop, it looks correct:
MATNR IN gt_conditions[1]-ranges
AND ERSDA IN gt_conditions[2]-ranges
But this wont work because of "gt_conditions[1]-ranges". I know, i can work with the "table in table", because gs_conditions-ranges works (I already tested this).
Has anybody any idea how to make my idea work?

@Hymavathi:
Error is the following:
An exception occurred that is explained in detail below.
The exception, which is assigned to class 'CX_SY_DYNAMIC_OSQL_SEMANTICS', was
not caught and
therefore caused a runtime error.
The reason for the exception is:
The current ABAP program has tried to execute an Open SQL statement
which contains a WHERE, ON or HAVING condition with a dynamic part.
The part of the WHERE, ON or HAVING condition specified at runtime in
a field or an internal table, contains the invalid value
"GT_CONDITIONS[1]-RANGES".
@Hymavathi, second time:
This is the whole code for the select:
LOOP AT gt_conditions INTO gs_conditions.
l_index = sy-tabix.
CONCATENATE 'gt_conditions[' l_index ']-ranges' INTO l_condition.
CONDENSE l_condition NO-GAPS.
CONCATENATE gs_conditions-fieldname 'IN' l_condition INTO lt_condition SEPARATED BY space.
IF sy-tabix > 1.
    CONCATENATE 'AND' lt_condition INTO lt_condition SEPARATED BY space.
ENDIF.
APPEND lt_condition.
ENDLOOP.
SELECT * FROM (p_tab)
   INTO TABLE <gt_table>
        WHERE (lt_condition).
You can see, the select is after the loop. So gs_conditions-ranges wouldn't be right, then the where statement would only use the last range-tab from my table gt_conditions. (loop at...endloop => gs-conditions-range = last gt_conditions-range).

SQL statement with LIMIT and total count?

Hello,
I would like to know if it is possible to execute a single SQL statement that will return me a subset of data (for pagination purposes) that not only includes the subset of data for the page but the count of all available data. Can this be done so as to not take up the cpu and time it takes to essentially run two queries? One to get the subset and one to get the count? I think simply doing a subselect is not going to give me what I want in that we actually query twice.
There may be no way to do this other than that, but I wanted to check with the gurus here first. :)
Thanks,
Mark

select *
from (
select i.*,
row_number() over(order by i) rn, -- used for
pagination
count(*) over(partition by 1) cnt -- total count
of rows found for this search
from mytable
where < PUT ALL LIMITING (i.e., "search") CONDITIONS
HERE >
where rn between 41 and 50 -- pagination clauseNice one
BUT of course it adds additional row in execution plan and takes additional time and CPU :)
I assume that it directly depends of course on returned result set and some other factors like available sort space but a simple test case on a table big which actually is 1.6 M rows like dba_source got following results:
here is the first one returning also count(*)
SQL> select *
2 from (
3    select i.*,
4      row_number() over(order by owner, name, type) rn
5 , -- used for pagination
6      count(*) over(partition by 1) cnt -- total count of rows found for this search
7    from big i
8    where owner like 'S%' and name like '%A%'
9 )
10 where rn between 41 and 45
11 /
OWNER                          NAME                           TYPE
      LINE
TEXT
        RN        CNT
SYS                            ANYDATA                        TYPE
        13
STATIC FUNCTION ConvertVarchar(c IN VARCHAR) return AnyData,
        41     999744
SYS                            ANYDATA                        TYPE
        11
STATIC FUNCTION ConvertDate(dat IN DATE) return AnyData,
        42     999744
SYS                            ANYDATA                        TYPE
         9
        43     999744
SYS                            ANYDATA                        TYPE
         7
     They serve as explicit CAST functions from any type in the Oracle ORDBMS
        44     999744
SYS                            ANYDATA                        TYPE
         6
     enable construction of the AnyData in its entirity with a single call.
        45     999744
Elapsed: 00:00:41.02
SQL> ed
Wrote file afiedt.buf
1 select n.name, m.value from v$statname n, v$mystat m
2 where n.statistic# = m.statistic#
3*   and (upper(name) like '%SORT%' or upper(name) like '%TEMP%')
SQL> /
NAME                                                                  VALUE
physical reads direct temporary tablespace                            35446
physical writes direct temporary tablespace                           17723
RowCR attempts                                                            0
SMON posted for dropping temp segment                                     0
sorts (memory)                                                           36
sorts (disk)                                                              1
sorts (rows)                                                        1999596
OTC commit optimization attempts                                          0
8 rows selected.here is the second one returning only rows:
SQL> ed
Wrote file afiedt.buf
1 select *
2 from (
3    select i.*,
4      row_number() over(order by owner, name, type) rn
5 --, -- used for pagination
6 --    count(*) over(partition by 1) cnt -- total count of rows found for this search
7    from big i
8    where owner like 'S%' and name like '%A%'
9 )
10* where rn between 41 and 45
SQL> /
OWNER                          NAME                           TYPE
      LINE
TEXT
        RN
SYS                            ANYDATA                        TYPE
        13
STATIC FUNCTION ConvertVarchar(c IN VARCHAR) return AnyData,
        41
SYS                            ANYDATA                        TYPE
        11
STATIC FUNCTION ConvertDate(dat IN DATE) return AnyData,
        42
SYS                            ANYDATA                        TYPE
         9
        43
SYS                            ANYDATA                        TYPE
         7
     They serve as explicit CAST functions from any type in the Oracle ORDBMS
        44
SYS                            ANYDATA                        TYPE
         6
     enable construction of the AnyData in its entirity with a single call.
        45
Elapsed: 00:00:12.09
SQL> select n.name, m.value from v$statname n, v$mystat m
2 where n.statistic# = m.statistic#
3    and (upper(name) like '%SORT%' or upper(name) like '%TEMP%')
4 /
NAME                                                                  VALUE
physical reads direct temporary tablespace                                0
physical writes direct temporary tablespace                               0
RowCR attempts                                                            0
SMON posted for dropping temp segment                                     0
sorts (memory)                                                           10
sorts (disk)                                                              0
sorts (rows)                                                         999812
OTC commit optimization attempts                                          0
8 rows selected.So execution time 41 sec vs 12 sec
sorts (rows) 1 999 596 vs 999 812
physical reads/writes direct temporary tablespace 35446/17723 vs 0/0
I assume that for a small overall returned row count it probably is OK, but for less restrictive search it can be quite deadly as before with two queries.
Gints Plivna
http://www.gplivna.eu

Select statement with if condition in cursors

Create procedure test (t1 in varchar2 ,t2 out varchar2)
IS
BEGIN
IF t1 = 'E'
select ENO INTO t2 from emp ;
elsif t1 = 'D'
select DNO INTO t2 from dept ;
end if;
end
how do i write this using cursors

i think i have to go for two cursors Intially i have written like the below codeThis requirement merely made me think of a pure SQL solution - something interesting...
As I mentioned, you likely should be using ref cursors as typically this requirement extends to a client that wants to make a call to Oracle without needing to know SQL or table names, pass parameters, and get a dynamic "+result set+" in response.
In Oracle. this is done using ref cursors. The code will look something like this"
{code}
create or replace procedure FooProc( someVar1 varchar2, someVar2 number, curResult OUT sys_refcursor ) is
begin
case
when someVar1 = someValueA then
open curResult for select * from emp;
when someVar1 = someValueB then
open curResult for select * from emp where empid = someVar2;
.. etc ..
end case;
end;
{code}
This is pretty straight forward stuff - and well explained with examples in the Oracle® Database PL/SQL User's Guide and Reference (http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14261/sqloperations.htm#sthref139)
You procedure it a tad different in output parameters (and not what one typically would get in a production system), but the concept is the same. If the SQL projection is the same for each cursor, you can use a ref cursor as above - and then simply code a single fetch to get the row's columns, close the cursor, and then return that column values as output parameters.
Edited by: Billy Verreynne to fix the broken Jive s/w that does not understand how to parse a link and show it correctly.. (am getting more and more peeved at the crappiness factor of the new forum s/w)

What is syntax for inner join of Select statement with Secondary Index

Hi Genies,
                Here i have created the Secondary index for table COEP and also used for select query but there is no improvement in runtime . taking same time for select query without index as well as with index. my code is
SELECT * INTO CORRESPONDING FIELDS OF TABLE ITAB_COEP FROM COEP AS A
             INNER JOIN COBK AS B ON ( A~BELNR = B~BELNR AND A~KOKRS = B~KOKRS AND A~GJAHR = B~GJAHR )
             WHERE A~OBJNR = OBJNR
             AND A~GJAHR = CURRY
             AND B~GJAHR = CURRY
             AND A~RBEST = ''
             AND A~BEKNZ = 'S'
             AND B~BELNR NE WA_COBK-BELNR
             AND B~AWREF_REV = ''
             AND B~AWORG_REV = ''
             AND B~KOKRS = WA_COIOB-KOKRS
             AND B~BLDAT BETWEEN START_DATE AND END_DATE
             AND B~BLART IN ('SA','KA','KR','AB') %_HINTS ORACLE 'INDEX("COEP" "COEP~ZBU")'.
index name is ZBU.
please any one let me know is there any syntax mistakes? but while checking and during the runtime it does'nt shows any error.
Regards,
        Thangam.P

Hi Genies,
                Here i have created the Secondary index for table COEP and also used for select query but there is no improvement in runtime . taking same time for select query without index as well as with index. my code is
SELECT * INTO CORRESPONDING FIELDS OF TABLE ITAB_COEP FROM COEP AS A
             INNER JOIN COBK AS B ON ( A~BELNR = B~BELNR AND A~KOKRS = B~KOKRS AND A~GJAHR = B~GJAHR )
             WHERE A~OBJNR = OBJNR
             AND A~GJAHR = CURRY
             AND B~GJAHR = CURRY
             AND A~RBEST = ''
             AND A~BEKNZ = 'S'
             AND B~BELNR NE WA_COBK-BELNR
             AND B~AWREF_REV = ''
             AND B~AWORG_REV = ''
             AND B~KOKRS = WA_COIOB-KOKRS
             AND B~BLDAT BETWEEN START_DATE AND END_DATE
             AND B~BLART IN ('SA','KA','KR','AB') %_HINTS ORACLE 'INDEX("COEP" "COEP~ZBU")'.
index name is ZBU.
please any one let me know is there any syntax mistakes? but while checking and during the runtime it does'nt shows any error.
Regards,
        Thangam.P

Any efficient way to select data with limit?

HI
I want to select some rows of my table for showing in a webpage
number of rows is very very much and all of them cannot be showed in one page, so i used paging for my webpage
every page has just 20 rows
problem is here , how to select rows between 400 and 420 ( for example)
i am using this way of query:
select * from
select col1,col2,col3, rownum as r_n
from my table
where ... and .... and ... and ...
order by id desc
where r_n between 400 and 420
this query works, but it is slow. i think database first run inner query and select all rows then select those ones that are in my range
is there any other efficient way to do this?

What is a "realtime response"?
Do they really want the response to be fast on the 200,000th page? Is there actually a use case where a human being looks at 20 rows, hits next, and repeats 200,000 times? Because assuming that the user takes only a second to wait for the page to render, read the results, and hit next, that means that this one user will have spent 3333 minutes/ 55.6 hours/ 2.3 days just looking at results without a break. Are they really going to care at that point if it takes a bit longer to get the next page of results?
Part of being a developer is explaining trade-offs to the customer. If you want the database to page the results by issuing separate queries, the first page of results will be far faster than the 200,000th page. Since users are normally far more concerned about the performance of the first page than the 200,000th, this is generally a reasonable trade-off. There are alternate approaches that will likely improve the performance of fetching the 200,000th page of results. But those will generally require a more complex architecture. For example, you can return a REF CURSOR to the middle tier and let the middle tier fetch a page of results at a time. But then you have to implement the state control logic so that the right end user session sees the right cursor handle and gets the right session back (this problem is much, much easier in a client/server application)
Justin

How to do an insert with a select statement, with unique values

Hi,
I have an insert statement like this
INSERT INTO TABLEA (ID, zzz
SELECT sequence.nextval, zzz FROM TABLEB
The problem is TABLEA won't allow any duplicates and TABLEB will return duplicates. Yet I can't use the distinct keyword since I am using a sequence.
Thanks.

Samuel411 wrote:
Hi,
I have an insert statement like this
INSERT INTO TABLEA (ID, zzz
SELECT sequence.nextval, zzz FROM TABLEB
The problem is TABLEA won't allow any duplicates and TABLEB will return duplicates. Yet I can't use the distinct keyword since I am using a sequence.
Thanks.Why not?
drop sequence s
create sequence s;
create table distincting (col1 number, object_owner varchar2(30));
TUBBY_TUBBZ?
insert into distincting
select s.nextval, object_owner
from
select
distinct
owner as object_owner
from dba_objects
9 );
37 rows created.
TUBBY_TUBBZ?

Select statement with LIMIT

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