How to retrieve one row from the number of records in a table

i want to retrieve the rows from the number of records in a table without using the perticular column name.

select count(*) from table
/If you have your table currently analyzed, and no changes have been made, then you could
select num_rows from user_tables where table_name = 'table'

Similar Messages

How to select one row from the datatable

hi,
I have a data table which displays the employee list .the table contains 4 columns which represents the employee code,address,status like that.
when we click on particular row,the row must be selected and the total details of the employee will be displayed on the same page below the datatable.
how to write the code for this.

Hi
Jsp Page
<h:dataTable value="#{bean.list}" var="role" binding="#{bean.table}">
binding- attribute need to include in dataTable tag
Bean
1> private UIData _table; as variable
2>Getter and setter Methods
public void setTable(UIData table) {
_table = table;
public UIData getTable() {
return _table;
3> Object objectName=(Object)_table.getRowData();; -- include the code in the method u wanna fetch the row data.
It'll work

How to bring the more than one rows from the table into the script

Hi
I have to bring more than one rows from the table into the Main windows of the script. so plz help me out.
Thanks in Advance
Ananya

Hi Ananya,
   Bring more than one row into main window of script.
   For this you need to do some changes for data which you pass to main window.At a time you need to pass more than one row,so for this you need to define one structure.See below code.
Types:begin of ty_rows,
     include structure (your row_structure),
     include structure (your row_sturcture),
Types:end of ty_rows.
for example....
If i need to pass 2 vendor details at a time to main window then the structure should be like this.
Types:begin of ty_rows,
       vendor1 like lfa1-lifnr,
       vendor1_name like lfa1-name1,
       vendor2 like lfa1-lifnr,
       vendor2_name like lfa1-name1,
      end of ty_rows.
Data:i_main type standard table of ty_rows,
     wa_main type ty_rows.
Based on condition you can pass more than one rows of your actual internal table data to i_main internal table.
Then you can pass i_main internal table to your main window.
    I think this will help you.
Cheers,
Bujji

How to remove only one row from the database using labview6.1

using labview 6.1 I create a table with various rows and columns and store bulk of data's in them.,, what procedure should I follow to remove only one paticular row from the database? Help me out with an example please,,
Thanking you in advance!

Hi,
If you have the database toolkit you can delete a row using just a SQL Query to "DB Tools Execute Query.VI"
Example:
DELETE FROM Table name Where SerialNum='Value' And Date='Value' And Time='Value'
See also attached VI
Best Regards
Johan
Attachments:
Delete_a_row_in_a_database_table.vi ‏48 KB

Forms: how to use COUNT_RECORD to get the number of record retrieved?

After GO_BLOCK(BlockName)EXECUTE_QUERY, there must a way to obtain the number of records retrieved.
I like to use this number to display to number of records on the form.
Clearly, a not so good way is:
SELECT COUNT(*) INTO :NUM_RECORD FROM Table_Name;
It queries table one more time.
Could any one give a clue?
Thank you.

Dear Kiran,
Fom tables EINE (inforec no, plant) and EINA (inforec no, material, vendor), you can get the desired information.
Regards,
Prasanth

How do I select rows from the same table that have multiple occurances

Hi Everybody,
I am trying to select records from a detail table by grouping it. The table has more than 1 million records and the query is not performing well. The basic question is how to select a distinct record from a table which matches all values in one column and any in the other.
desc SCV
ID NUMBER PK (ID + SCRID)
SCRID NUMBER FK(SC)
ID SCRID
1 1
2 1
3 1
4 2
5 2
6 3
7 4
8 4
desc PROJECTS
ID NUMBER PK
NAME VARCHAR2(100)
ID NAME
1 PROJECT1
2 PROJECT2
3 PROJECT3
4 PROJECT4
desc PJS
ID NUMBER
PROID NUMBER FK (PROJECTS)
SCRID NUMBER FK (SCV(SCRID + SCVID)
SCVID NUMBER
ID PROID SCRID SCVID
1 1 1 1
2 1 1 2
3 1 2 5
4 1 3 6
5 1 4 7
6 2 1 3
7 2 2 4
8 2 2 5
9 2 4 7
There are over 1 million records in PJS.
desc TBP
SCRID NUMBER
SCVID NUMBER
SCRID SCVID
1 1
1 2
1 3
2 4
2 5
3 6
4 7
4 8
The requirement is to select projects that have matching SCRID, SCVID from TBP such that
all distinct SCRID should match and within that and any SCVID match will do. (A "AND" between each SCRID and an "OR" for each SCVID in that SCRID like 'SCRID = 1 AND (SCVID = 1 OR SCVID = 2 OR SCVID = 3) AND SCRID = 2 AND (SCVID =....)
So, for the sample data it should return us PROID = 1
I have few queries written for this:
SELECT PROID FROM PJS,TBP WHERE TBP.SCVID = PJS.SCVID AND TBP.SCRID = 1
INTERSECT
SELECT PROID FROM PJS,TBP WHERE TBP.SCVID = PJS.SCVID AND TBP.SCRID = 2
INTERSECT
SELECT PROID FROM PJS,TBP WHERE TBP.SCVID = PJS.SCVID AND TBP.SCRID = 3
INTERSECT
SELECT PROID FROM PJS,TBP WHERE TBP.SCVID = PJS.SCVID AND TBP.SCRID = 4
This query performs well but the cost is very high, hardcoding, sorting.
The 2nd option is to:
SELECT pjs.PROID proid
FROM TBP tbp,
PJS pjs
WHERE pjs.SCVID = tbp.SCVID
AND pjs.SCRID = tbp.SCRID
GROUP BY pjs.PROID
HAVING COUNT(DISTINCT pjs.SCRID) = (SELECT COUNT(DISTINCT SCRID ) FROM TBP)
This has a low cost but runs slowly.
One more way I tried was with the IN operator like
SELECT DISTINCT PROID FROM PJS A,TBP T WHERE T.SCRID = 1 AND T.SCVID = A.SCVID
AND PROID IN (SELECT PROID FROM PJS A,TBP T WHERE T.SCRID = 2 AND T.SCVID = A.SCVID
AND PROID IN (...SO ON with each DISTINCT SCRID.
Again this involves too much of sorting.
Any help will be appriciated.
Thanks in advance.

Hi Andrew,
Use DELETE t_itab statement inside the loop.
I have modified your code. It is perfectly working.See bellow -
LOOP AT it_zmember01 INTO wa_zmember01.
WRITE: / wa_zmember01-mnumber UNDER 'NUMBER',
wa_zmember01-mname UNDER 'NAME',
wa_zmember01-mdob UNDER 'DOB'.
WRITE / '-----------------------------------------------------------------'.
DELETE it_zmember01. " Modified
ENDLOOP.
DELETE it_zmember01. statement inside the loop will delete the current row of the table.
Regards
Pinaki

How to retrieve photos directly from the iPhoto library?

I have over 18 GB and rising of photos in my iPhoto library. Suppose I had to change to a Windows machine or for some other reason I could not access my photos via iPhoto. Fanciful I know, but I am not so much concerned with the probability of something going wrong but with the calamity that would result if something did go wrong. I note that some years ago Microsoft changed the file structure of their Word files from a proprietary one to an open access one to allow easy access to the text. So how could my photos be retrieved directly from the iPhoto library?
Perhaps the answer is to send the library to a tech firm like the ones that retrieve data from damaged hard drives and they could pick off the photos and return them as a set of image files in a folder. But is it actually possible for anyone to do that?

If, at some time in the future, you want to get all of your original image files onto an external HD in folders representing the Events in your iPhoto Library here are the simple steps to follow:
1 - select all of the Events in your library.
2 - use the File ➙ Export ➙ File Export menu option and setup the export as shown in this screenshot:
3 - click on the Export button, select the destination where you want to save these folders and continue.

Pick only one row from the repeated rows

Oracle 10g r2 (10.2.0.5)
I have a query/view, which returns the the reords as follows
set colsep ||
Name     ||     Address     ||        Zip
abc123     || Ln1     || 123456
bcd123     || Ln2     || NULL
bcd123     || Null     || 45678
efg123     || Ln0     || 96345
efg123     || Ln0123     || Null
efg123     || adr     || null
the result set I need from the above is
set colsep ||
Name     ||     Address     ||        Zip
abc123     || Ln1     || 123456
bcd123     || Ln2     || NULL
efg123     || Ln0     || 96345
As you see that the first record on each repeated row sets are required
Thanks,

Hi,
Using the aggregate FIRST (or LAST) function like that, there's no guarantee that all of the output values on the same row will come from the same row in the original table. To do that, you can use the analytic ROW_NUMBER function, like this:
WITH     got_r_num     AS
     SELECT     name, address, zip, ...
     ,     ROW_NUMBER () OVER ( PARTITION BY name
                               ORDER BY         address
                         ,                zip
                       )      AS r_num
     FROM     table_x
SELECT     name, address, zip, ...
FROM     got_r_num
WHERE     r_num     = 1
;This assumes the "first" row is the one with the first address (in alphabetic order), and, in the event of a tie, the one with the lowest zip (however "lowest" is defined for zip). You can specify any order you want in the analytic ORDER BY clause.
I hope that answers your question.
If not, what is your question? Use words other than those you've already used to describe what you want to do.
Explain exactly what "first" means in this problem.Point out where the query above (or the one posted by Claytonian, if that seems closer) is getting the wrong results, and explain how you'd get the right results in those places.
If necessary, post new sample data (either CREATE TABLE and INSERT statements, or a WITH clause, as Claytonian did) and the results you want from that data.

Selecting a one row from the database is not working

Hi all I am having a small problem with getting a row from my database to show up. Here is the code for the search that I want to do
String item; String columnName; String result; columnName = (String)searchBox.getSelectedItem(); item = searchField.getText().trim(); String tableName = "employee"; if(item == null || item.equals("")){ System.out.println("No Text entered"); }else{ try { result = sql.retrieve_From_Database(columnName, tableName, item); System.out.println(result); } catch (SQLException e1) { sql.displayErrors(e1); }
Here is the code for the retrieve_From_Database function.
protected String retrieve_From_Database(String columnName, String tableName, String item) throws SQLException{ ResultSet rs = null; Statement sm = null; sm = con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_READ_ONLY); rs = sm.executeQuery("select * from " + tableName + " where " + columnName + " = " + item); result = rs.getString(columnName); if(result == null){ System.out.println("Error in retrieve"); return new String("No results in DB"); }else{ System.out.println(result); return result; } }
When I run the first code I get an error of SQL Exception: Unknown column 'anthony' in 'where clause'. But yet when I run the query of
Select * from employee where FirstName = 'anthony'
within the mysql commandline I get the proper result. So my question is why when running this in the command line do I get the proper result but when running the code I do not?

jo**** wrote:
Hi. The problem is clear in the original post. The OP is trying to use PreparedStatement
parameters to fill out general portions of the SQL query, instead of only data values.
He is hoping to put in a column name. That will never work. Only data values are settable.
HTH,
Joe WeinsteinActually, no. There's no PreparedStatement there at all. It appears that his problem is that, while the working query entered directly in the client is
Select * from employee where FirstName = 'anthony'the query he's constructing in his code is
Select * from employee where FirstName = anthonySince there are no quotes around anthony, it's treated as a column name.
If he had properly used PreparedStatment as suggested in reply 1, that would not be an issue. My guess, however, is that when he claims he's using PS, it's as Tolls suggested a couple of posts ago--he's simply replacing the Statement with a PreparedStatement, but not using the parameters as suggested.
The wrong thing for OP to do at this point is see my above comment about the quotes and explicitly add them in the query string. The right thing to do, of course, is to actually use PS's parameters.
Edited by: jverd on Oct 11, 2010 10:08 AM

How to get specific rows from the vo or Iterator in the backing bean?

Hi,
I have to get the specific number of rows from iterator in the backing bean. means i want to get the records from the VO or Iterator only from 5 th record to 10th record its like rownum in SQL.
We can use rownum in VO sql query. but there would be a performance issue with that ...
SO i am trying to get the rows from ADF Iterator once we fetch from DB.
Is it possible to do that ?
Do we have any way to set the pointer to the VO/Iterator like setFirst() and after that setMaxResult to retrun the rows between first and maxresult..
Thanks

If this is for pagination, then af:table offers pagination by design when you set accessmode=RangePaging or RangePagingIncremental in VO. Paginated queries are fired when scroll down in the table. Explore this option before you try out any custom solution
To answer the question,
Note: same logic i have implpemented ADF with EJB ..In EJB Query class we have setFirst(int) and setMaxResult(int) methods...simply i did setFirst(30) and setMaxResult(10)..It worked fine...Theoretically speaking the same can be achieved by setting setRangeStart() on the viewobject(which in turn sets to the default rowset) and by setting max fetch size on VO + accessmode=RangePaging. However when you use table with ADF binding, these will be overridden by the binding layer. If you are not using ADF binding, then the above is same as what you did for JPA entity. Other option is, you build expert mode VO with rownum for this special case, which will work if you dont need to set accessmode=RangePaging for VO.

How to skip one field from the file by using sqlldr

Hi ,
i'm using DB 10g R2 on Redhat ,
my control file hereunder ,
LOAD DATA
INTO TABLE reber.AAA_BILL
APPEND
REENABLE DISABLED_CONSTRAINTS
EXCEPTIONS reber.AAA_BILL
FIELDS TERMINATED BY '|'
(Streamnumber ,
MDN ,
USERNAME ,
DOMAIN ,
USERIP ,
CORRELATION_ID ,
ACCOUNTREASON ,
STARTTIME ,
PRIORTIME ,
CURTIME ,
SESSIONTIME ,
SESSIONVOLUME ,
RATEPOLICYIDX ,
FEE ,
GROUPID ,
SERVICEID)and this is one records of the file ,
222|1|0664363446|12D0DC90||10.15.6.45|007b8aa5|3|20111029204824|20111029204824|20111029211504|1600|0|147|0|4000|10154|really i want to skip the first field in the file which is (222|) and starting from the second field ,
any help please

Thank you for you reply ,
really i know the Filler to skip colomn from the table , is the Filler working also to skip field from the File . i'll read the link to check this

How to retrieve lost data from the reset Blackberry?

Hi all, I accidentally reset my Blackberry curve 8250 when i wasnt sober and all my phone contacts, sms and notes were lost. basically i use my bb as a note pad so there were many info saved on the phone. i didnt do any backup before, but i really wanna retrieve the lost data desperately. is there any method or third party software which can retrieve the data or its not possible at all? please help me out w this. thank you!!!!!

Please see the answer to your duplicate post here:
http://supportforums.blackberry.com/t5/BlackBerry-Curve-BlackBerry-8500/URGENT-How-to-RETRIEVE-LOST-...
Please don't post duplicate questions.
Thanks!
Occam's Razor nearly always applies when troubleshooting technology issues!
If anyone has been helpful to you, please show your appreciation by clicking the button inside of their post. Please click here and read, along with the threads to which it links, for helpful information to guide you as you proceed. I always recommend that you treat your BlackBerry like any other computing device, including using a regular backup schedule...click here for an article with instructions.
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How to select a row from duplicate set of records?

I want to select a row from a duplicate set of records.
below is the explanation of my requirement.
select * from test_dup;
COL_BILL     COL_SERV     COL_SYS
b1     s1     c
b1     s1     g
b1     s2     c
b1     s2     g
b2     s2     g
b2     s3     c
b2     s3     g
b3     s3     c
Here what I want is, for a distinct col_sys if col_bill and col_serv is same then I need the row where col_sys='c'
from the above result set I need the following:
b1     s1     c
b1     s2     c
b2     s3     c
I am using the following SQL query which is giving me the correct result set. But it will hamper the performance because there are total 45 columns in the table and total volume is around 50 million.
select * from test_dup where col_bill||col_serv in (
select col_bill||col_serv from (
select col_bill,col_serv,count(*) from test_dup
where col_sys in ('c','g')
group by col_bill,col_serv having count(*) >1)) and
col_sys='c';
Can anyone please provide me the optimize SQL query for the same.

Hi,
Another way,
SQL> with test_dup
as
     select 'b1' col_bill, 's1' col_serv, 'c' col_sys from dual union all
     select 'b1', 's1', 'g' from dual union all
     select 'b1', 's2', 'c' from dual union all
     select 'b1', 's2', 'g' from dual union all
     select 'b2', 's2', 'g' from dual union all
     select 'b2', 's3', 'c' from dual union all
     select 'b2', 's3', 'g' from dual union all
     select 'b3', 's3', 'c' from dual
select col_bill, col_serv, min(col_sys) col_sys
    from test_dup
   where col_sys in ('c', 'g')
group by col_bill, col_serv
having count( * ) > 1
     and count(nullif(col_sys, 'g')) > 0;
CO CO C
b1 s1 c
b2 s3 c
b1 s2 c
3 rows selected.Regards
Peter
Edited by: Peter on Feb 18, 2009 1:10 AM
- Added test data, thanks Karthick

How to retrieve characters like '£' from the database and write to xml file

Hi ,
I have a requirement to retrieve the data from database and write to files in XML format.
I am able to do so successfuly by using XMLElement tag and writing to file through UTL_File package.
All characters like <&@^ get converted properly, but when it comes to multibyte chars like '£', they are not able to get converted as it is.
Can somebody please advise me how to go ahead.
Regards

Thanks odie.
The nls_charset for my database is WE8ISO8859P1 and database version is Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bi.
The data (with pound sign) is sitting in one of the columns of the table and when i query it directly, I am able to view it properly.
However when I use the below code to retrieve in XML format and print it to file, it gets changed. This file is also passed to one of the application GUI where this XML gets processsed and it is not visible properly.
below id the sample abstract of code I am using.
Declare
l_file UTL_FILE.FILE_TYPE;
l_clob CLOB;
l_buffer VARCHAR2(32767);
l_amount BINARY_INTEGER := 32767;
l_pos INTEGER := 1;
Begin
SELECT XMLElement("case",
XMLElement("comments",
XMLElement("comment",
XMLElement("comments",a.COMMENTS)
).getClobVal() val1 into l_clob
FROM TO_COMMENTS a
l_file :=
UTL_FILE.fopen (XMLDIR,
test.xml,
'w',
32767);
LOOP
DBMS_LOB.read (l_clob,
l_amount,
l_pos,
l_buffer);
UTL_FILE.put_line (l_file, l_buffer);
l_pos := l_pos + l_amount;
END LOOP;
EXCEPTION
WHEN NO_DATA_FOUND THEN
DBMS_OUTPUT.NEW_LINE('Reached end of file');
END;
The comments column given contains the character like pound.
And once the file is generated and i see using the vi editor, the char is not viewable properly like Â£
And when the same is passed to GUI application to be processed, its not viewable propely in GUI from IE as well like �.

How to retrieve invoice details from the sales order .. urgent..

hi,
i am retrieving vbak-vbeln with this i should retreive invoice details
how to relate vbak with abrk table
i have vbak -vbeln,erdat,VBAK- VKORG,VBAK-KUNNR,VBAK-VTWEG,VBAK- SPART.
its urgent..

Hi
U can see the sales order number in VBRP table, fields:
VBRP-AUBEL and VBRP-AUPOS.
But if u have the sales order number it's better to use VBFA table.
SELECT * FROM VBFA WHERE VBELV = VBAK-VBELN
AND VBTYP_N = 'M'
SELECT SINGLE * VBRK WHERE VBELN = VBFA-VBELN.
IF SY-SUBRC = 0.
WRITE: 'Bill number:', VBRK-VBELN.
ENDIF.
ENDSELECT.
U have to make sure to use the right document type:
M = Invoice
N = Invoice cancellation
So the bill type depends on the sales order type
Max

How to retrieve one row from the number of records in a table

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