Multiple rows of output

Playing with the InsertUpdateDelete Tutorial
How do I output the data in two or more rows and two or more columns - versus one row two or more columns?
Thanks...

Ok, Thanks..
However, I am still left with how to display 12 fields from a database select statement.. on one xhtml page..
Is there a tutorial, example somewhere to show how to "bind" database fields to multiple - another JSF Standard Component such as an - Output Text Field(s).
example: bind table "taxonomy" field "family" to "outputText1," field "genus" to "outputText2," field "species" to "outputText3" etc.. and table "character" field "exposure" to "outputText10", etc.
Thanks...

Similar Messages

VC 7.2 webservice multiple rows output - problem

I found a wiki which tells about solving the problem about a webservice output.
i am having a ws with multiple rows as output, but in VC I am getting only the first row.
I found a solution, but I am not able see the options given to Add fields.
please suggest me.
http://wiki.sdn.sap.com/wiki/display/VC/Outputfieldnotseenas+array

solved myself
solution:
the output of the webservice I had like below
--a
---b
node be returns field1, field2, field3
I was selecting a as my entry point(current node as context), so the table was showing only the first row.
The solution is, make b node as your entry point(current node as context), it will show all rows.
Enjoy

Oracle query - Merging multiple rows into a single row output

Hi All,
I have to have a multiple row output to be converted into a single row output.My current output looks as follows:
ID YR INC_CODE OFFN SCHOOLNO
8006 2002 00175 SC03 12
8006 2002 00175 DC06 12
8006 2002 00175 DC03 12
8006 2002 00175 DC02 12
ID,INCIDENT CODE,OFFENSE are all Primary keys
So I need the output as follows:(IN ONE ROW)
ID YR INC_CODE OFFN1 OFFN2 OFFN3 OFFN4 SCHOOLNO
8006 2002 00175 SC03 DC06 DC03 DC02 12
Can you help me on this since have been spinning the wheel and this has to be a query since will have couple of tables join to produce a materialized view.
Thanks in advance

Hi Nigel,
Thanks for the reply I tested out the portion having the decode and I get the output as follows:
ID YR INC_CODE OFFN1 OFFN2 OFFN3 OFFN4 OFFN5
8982 2002 2175 DOC01 -----------------------
8982 2002 2175 DOC02-------------------
8982 2002 2175 DOC03------------
8982 2002 2175 DOC06-------
8982 2002 2175 SCV03
There is no value as max for OFFN and each INC_CODE MAY HAVE UP TO A MAX OF 5 OFFN.My query is as follows:
select distinct STU_STUDENT_ID, INC_BEG_SCH_YR,INC_INCIDENT_CODE
, decode(rank() over (partition by INC_CODE order by OFFN),1,OFFN,null) as offn1
, decode(rank() over (partition by INC_CODE order by OFFN),2,OFFN,null) as offn2
, decode(rank() over (partition by INC_CODE order by OFFN),3,OFFN,null) as offn3
, decode(rank() over (partition by INC_CODE order by OFFN),4,OFFN,null) as offn4
, decode(rank() over (partition by INC_CODE order by OFFN),5,OFFN,null) as offn5
from stu_offn where
stu_offn.ID = '8982' and stu_offn.INC_CODE = '2175'
(****Where clause is just given to just check a value)
So as you know I need to just have all the OFFN in a single row ie as follows:
ID YR INC_CODE OFFN1 OFFN2 OFFN3 OFFN4 OFFN5
8982 2002 2175 DOC01 DOC02 DOC03 DOC06 SCV03
Can you just give me a step by step procedure to go through this and the table in this case is just 'STU_OFFN'
Thanks for the earlier reply appreciate it!
****Sending this again to show the exact way the output is coming

Retrieve multiple row single column output as single string

hii
I have query like "select country_name from country_master where <condition>".
This query results in multiple rows. I want those multiple rows as a string like "country1, country2, contry3".
I know i can write a function/cursor to achieve that but want to know if we have a way to get that within the query itself.
Thanks

In 10g...
SQL> select dname from dept;
DNAME
ACCOUNTING
RESEARCH
SALES
OPERATIONS
IT SUPPORT
SQL> ed
Wrote file afiedt.buf
1 select ltrim(sys_connect_by_path(dname,','),',') as depts
2 from (select dname, row_number() over (order by deptno) rn from dept)
3 where connect_by_isleaf = 1
4 connect by rn = prior rn + 1
5* start with rn = 1
SQL> /
DEPTS
ACCOUNTING,RESEARCH,SALES,OPERATIONS,IT SUPPORTIn 11g, you can use the LISTAGG analytical function.

Multiple rows Converge to Single row and join

Hi Folks,
I am facing a tricky challenge to join a table with multiple rows and converge into a single row (based on ID, period) and join with another table to get a single row. Let me explain.
Table 1: DTL_TABLE (id, period, course, names, title, type)
1 2010 mat john null null
1 2010 mat jim null null
1 2010 cam null officer null
1 2010 cam null Prof null
1 2010 phy null null Inclass
1 2010 phy null null Online
Join with
Table 2: ID_TABLE(id, period, Loc, Dept, Code)
1 2010 nj 101 CC.
Output format (id, period, course, names, title, type, Loc, Dept, Code)
result : 1 2010 mat,cam,phy john,jim officer,prof inclass,online nj 101 CC
I have created all the DDLs and DMLs if that help. Kindly let me know if a Join SQL query is possible.
Thank you,
Aj
CREATE TABLE DTL_TABLE
   ids      VARCHAR2 (10),
   period   VARCHAR2 (10),
   course   VARCHAR2 (10),
   names    VARCHAR2 (10),
   title    VARCHAR2 (10),
   TYPE     VARCHAR2 (10)
INSERT INTO DTL_TABLE
     VALUES ('1',
             '2010',
             'mat',
             'jim',
             NULL,
             NULL);
INSERT INTO DTL_TABLE
     VALUES ('1',
             '2010',
             'mat',
             'john',
             NULL,
             NULL);
INSERT INTO DTL_TABLE
     VALUES ('1',
             '2010',
             'mat',
             'kale',
             NULL,
             NULL);
INSERT INTO DTL_TABLE
     VALUES ('1',
             '2010',
             'cam',
             NULL,
             'officer',
             NULL);
INSERT INTO DTL_TABLE
     VALUES ('1',
             '2010',
             'cam',
             NULL,
             'prof',
             NULL);
INSERT INTO DTL_TABLE
     VALUES ('1',
             '2010',
             'phy',
             NULL,
             NULL,
             'inclass');
INSERT INTO DTL_TABLE
     VALUES ('1',
             '2010',
             'phy',
             NULL,
             NULL,
             'online');
COMMIT;
CREATE TABLE id_table
   ids      VARCHAR2 (10),
   period   VARCHAR2 (10),
   loc      VARCHAR2 (10),
   dept     VARCHAR2 (10),
   code     VARCHAR2 (10)
INSERT INTO id_table
     VALUES ('1',
             '2010',
             'nj',
             '101',
             'cc');
COMMIT;

Aj09 wrote:
Hi Folks,
I am facing a tricky challenge to join a table with multiple rows and converge into a single row (based on ID, period) and join with another table to get a single row. Let me explain.
Table 1: DTL_TABLE (id, period, course, names, title, type)
1 2010 mat john null null
1 2010 mat jim null null
1 2010 cam null officer null
1 2010 cam null Prof null
1 2010 phy null null Inclass
1 2010 phy null null Online
Join with
Table 2: ID_TABLE(id, period, Loc, Dept, Code)
1 2010 nj 101 CC.
Output format (id, period, course, names, title, type, Loc, Dept, Code)
result : 1 2010 mat,cam,phy john,jim officer,prof inclass,online nj 101 CC
I have created all the DDLs and DMLs if that help. Kindly let me know if a Join SQL query is possible.
SELECT TBL.id,
       DTLperiod,
       course,
       names,
       title,
       TYPE,
       Loc,
       Dept,
       Code
FROM   ID_TABLE TBL,
       DTL_TABLE DTL
WHERE TBL.ID = DTL.ID
       AND TBL.PERIOD = DTL.PERIOD; it not good to use RESERVED WORDS like "ID" or "TYPE" as column names

Query multiple rows

Hi, need some help on XML and XSD.
say I have a table in the database with 3 columns: a, b, c
on my XDP form, I have a table, like a spreadsheet, with 3 columns too: x, y, z
and it has 10 rows.
I want to pre-fill the form with 10 rows of data,
so, in my Process's action profile,
I use JDBC's query multiple rows to get the first 10 records of my database table.
how do I put these 10 rows of data into the table on my form?
TIA for helping me.
Happy New Year!

Step1: Use SQL Query Multiple results as XML activity
Step2: Define the output of SQL activity to look similar to
<table>
    <row>row1 value</row>
    <row>row2 value</row>
    <row>row3 value</row>
    <row>row4 value</row>
    <row>row5 value</row>
    <row>row6 value</row>
    <row>row7 value</row>
    <row>row8 value</row>
    <row>row9 value</row>
    <row>row10 value</row>
</table>
Step3: arrange your forms fields (Table and rows) in the same way as mentioned above.
Nith

Splitting comma seperated column data into multiple rows

Hi Gurus,
Please help me for solving below scenario. I have multiple value in single column with comma seperated values and my requirement is load that data into multiple rows.
Below is the example:
Source Data:
Product         Size                                 Stock
ABC              X,XL,XXL,M,L,S                 1,2,3,4,5,6
Target Data:
Product         Size                                 Stock
ABC              X                                     1
ABC              XL                                   2
ABC              XXL                                 3
ABC              M                                    4
ABC              L                                      5
ABC             S                                        6
Which transformation we need to use for getting this output?
Thanks in advance !

Hello,
Do you need to do this tranformation through OWB mapping only? And can you please tell what type of source you are using? Is it a flat file or a table?
Thanks

Depicting multiple rows' data in one row

Hi All,
Pls. check the below query:
select manager_id mg_id, employee_id emp_id, last_name name from employees
where manager_id = '100'
and DEPARTMENT_ID = '80'if i run the following query, then o/p comes row wise; like below:
       mg_id           emp_id            name
       100             145                     Russell
       100             146                     Partners
       100             147                     Errazuriz
       100             148                     Cambrault
       100             149                     Zlotkeybut if i want the o/p like below; i.e; under manager # 100, all employees' emp_id and name should come in only ONE row NOT in multiple rows:
mg_id                   emp_id     name          emp_id       name       emp_id     name        emp_id     name                emp_id         name
100                             145             Russell     146       Partners        147     Errazuriz       148              Cambrault        149        Zlotkeypls. help me to sort out the above sought o/p.
kindly tell me if there is any posting guidelines (except "Plain Text Help" on the right side) in this forum. i tried a lot to post above two o/p in easily readable format, but couldn't do that.
Edited by: Shariful on Sep 20, 2009 4:28 AM
Edited by: Shariful on Sep 20, 2009 4:29 AM

Hi,
Shariful wrote:
Hi All,
Pls. check the below query:
select manager_id mg_id, employee_id emp_id, last_name name from employees
where manager_id = '100'
and DEPARTMENT_ID = '80'
if i run the following query, then o/p comes row wise; like below:
mg_id           emp_id            name
100     145     Russell
100     146     Partners
100     147     Errazuriz
100     148     Cambrault
100     149     Zlotkey
but if i want the o/p like below; i.e; under manager # 100, all employees' emp_id and name should come in only ONE row NOT in multiple rows:
mg_id                   emp_id     name          emp_id       name       emp_id     name        emp_id     name                emp_id         name
100     145     Russell     146     Partners     147     Errazuriz     148     Cambrault     149     ZlotkeyIf you want all the emp_ids and names concatenated into one big VARCHAR2 column, that's called String Aggregation
[AskTom.oracle.com|http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:2196162600402] shows several different ways to do it.
You can format that one big column so that it looks like separate columns.
If you want each emp_id and name in its own column, that's called Pivoting .
Look up "pivot" for various techniques. If you do not know exactly how many rows were in the original query (and therefore how many columns you'll need in the output), then it will require Dynamic SQL , which can be complicated.
Unfortunately, when you do search for "pivot", mlost of the hits will be things like "Search for pivot and you'll get lots of examples".
Re: Help for a query to add columns is one that actually has some information. It was a question very much like yours.
kindly tell me if there is any posting guidelines (except "Plain Text Help" on the right side) in this forum. i tried a lot to post above two o/p and query in easily readable format, but couldn't do that.Type these 6 characters:
(small letters only, inside curly brackets) before and after formatted text, to preserve spacing.

Collecting data from multiple rows into one column

I'd like to run a query and put a collection of items into one output column instead of multiple rows. See the example below:
Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - Prod
PL/SQL Release 10.2.0.5.0 - Production
"CORE     10.2.0.5.0     Production"
TNS for 32-bit Windows: Version 10.2.0.5.0 - Production
NLSRTL Version 10.2.0.5.0 - Production
     CREATE TABLE "SKIP"."INGREDIENTS"
   (     "INGRED_ID" NUMBER,
     "INGRED_NAME" VARCHAR2(20 BYTE),
     "STORES" VARCHAR2(20 BYTE)
   ) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOGGING
STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
TABLESPACE "USERS" ;
REM INSERTING into SKIP.INGREDIENTS
Insert into SKIP.INGREDIENTS (INGRED_ID,INGRED_NAME,STORES) values (1,'SEA SALT','Food lion');
Insert into SKIP.INGREDIENTS (INGRED_ID,INGRED_NAME,STORES) values (2,'TABLE SALT','Food lion');
Insert into SKIP.INGREDIENTS (INGRED_ID,INGRED_NAME,STORES) values (3,'FLOUR','Piggly Wiggly');
Insert into SKIP.INGREDIENTS (INGRED_ID,INGRED_NAME,STORES) values (4,'YEAST',null);
Insert into SKIP.INGREDIENTS (INGRED_ID,INGRED_NAME,STORES) values (5,'BEER','ABC Store');
CREATE TABLE "SKIP"."PRETZELS"
   (     "PRETZEL_ID" NUMBER,
     "PRETZEL_NAME" VARCHAR2(20 BYTE),
     "PRETZEL_DESC" VARCHAR2(100 BYTE)
   ) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOGGING
STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
TABLESPACE "USERS" ;
REM INSERTING into SKIP.PRETZELS
Insert into SKIP.PRETZELS (PRETZEL_ID,PRETZEL_NAME,PRETZEL_DESC) values (1,'CLASSIC','Classic knot pretzel');
Insert into SKIP.PRETZELS (PRETZEL_ID,PRETZEL_NAME,PRETZEL_DESC) values (2,'THICK STICK','Straight pretzel, abt 1/2" in dia');
CREATE TABLE "SKIP"."INGRED_XREF"
   (     "PRETZEL_ID" NUMBER,
     "INGRED_ID" NUMBER
   ) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOGGING
STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
TABLESPACE "USERS" ;
REM INSERTING into SKIP.INGRED_XREF
Insert into SKIP.INGRED_XREF (PRETZEL_ID,INGRED_ID) values (1,1);
Insert into SKIP.INGRED_XREF (PRETZEL_ID,INGRED_ID) values (1,2);
Insert into SKIP.INGRED_XREF (PRETZEL_ID,INGRED_ID) values (1,4);
Insert into SKIP.INGRED_XREF (PRETZEL_ID,INGRED_ID) values (2,2);
Insert into SKIP.INGRED_XREF (PRETZEL_ID,INGRED_ID) values (2,3);
Insert into SKIP.INGRED_XREF (PRETZEL_ID,INGRED_ID) values (2,5);
-- Constraints for Table INGRED_XREF
ALTER TABLE "SKIP"."INGRED_XREF" MODIFY ("PRETZEL_ID" NOT NULL ENABLE);
ALTER TABLE "SKIP"."INGRED_XREF" MODIFY ("INGRED_ID" NOT NULL ENABLE);
{code}
Desired output (note how the ingredients are all listed in one column, separated by commas):
{code}
PRETZEL_ID PRETZEL_NAME     PRETZEL_DESC                        INGREDIENTS
1          CLASSIC          Classic knot pretzel                SEA SALT, TABLE SALT, YEAST
2          THICK STICK      Straight pretzel, abt 1/2" in dia   TABLE_SALT, FLOUR, BEER

See the FAQ : {message:id=9360005}
Especially links concerning string aggregation.

Interactive report – column heading in multiple rows

I am using interactive report. My question to the expert/guru’s is: - How do I change column heading into multiple row with text wrap.
For example:- My column heading is
Is Employee Trained ? -------> (single row display)
I want to make it display like
Is Employee
Trained ? ------> (Multi row display)
Sagar

Hi,
What you could do is, disable the download csv function from IR (Interactive Report Attributes--> Search Bar-- Uncheck Download) and in the region header create a link and redirect it to another page which will have the csv report output.
e.g. <a href="#" onclick="javascript:redirect('f?p=&APP_ID.:3:&SESSION.::&DEBUG.:3::');"" >Download Report </a>
Here I am redirecting the link to Page 3. On Page 3 create a sql report with the same query and make report template to csv. Thanks,
Manish

I wanted to display the multiple rows in one row but column should be diff

Hi
Could any body help me regarding this query how to write to get the multiple rows in one row.
eg.
i have one table tab1(eno number,ename varchar2,uid1 varchar2,uid2 varchar2,uid3 varchar4)
but when i am runing the query I am getting multiple record against one eno number because of uid1,uid2,uid3
suppose value of table is
eno ename uid1 uid2 uid3
1 a u1
1 a u2
1 a u3
when i am quering it is coming same as above but I want in one row
eno ename uid1 uid2 uid3
1 a u1 u2 u3
can any onle help me how to write the query for this requirement.
thanks
saif

which is hard coded in my code? Here another approach, but fail for c as there is no information for the value of a column: does 1 in u1 means col 1, etc.
/* Formatted on 2012/05/29 16:29 (Formatter Plus v4.8.8) */
WITH t AS
     (SELECT 1 col1, 'a' col2, 'u1' col3
        FROM DUAL
      UNION ALL
      SELECT 1 col1, 'a' col2, 'u2' col3
        FROM DUAL
      UNION ALL
      SELECT 1 col1, 'a' col2, 'u3' col3
        FROM DUAL
      UNION ALL
      SELECT 1 col1, 'b' col2, 'u1' col3
        FROM DUAL
      UNION ALL
      SELECT 1 col1, 'b' col2, 'u3' col3
        FROM DUAL
      UNION ALL
      SELECT 1 col1, 'b' col2, 'u2' col3
        FROM DUAL
      UNION ALL
      SELECT 1 col1, 'c' col2, 'u1' col3
        FROM DUAL
      UNION ALL
      SELECT 1 col1, 'c' col2, 'u3' col3
        FROM DUAL)
SELECT   xx.col1, xx.col2, MAX (DECODE (xx.rn, 1, col3)) AS uid1, MAX (DECODE (xx.rn, 2, col3)) AS uid2,
         MAX (DECODE (xx.rn, 3, col3)) AS uid3
    FROM (SELECT t.col1, t.col2, t.col3, ROW_NUMBER () OVER (PARTITION BY col1, col2 ORDER BY col3) rn
            FROM t) xx
GROUP BY col1, col2;output:
COL1     COL2     UID1     UID2     UID3
1     a     u1     u2     u3
1     b     u1     u2     u3
1     c     u1     u3
Edited by: ʃʃp on May 29, 2012 2:30 AM

Formula to calculate SUM of multiple sheets of excel and the result to be stored in another excel sheet and pop up alerts for multiple rows

I have a excel with multiple
sheets with data as shown below
SHEET 1
A 1
B 2
C 3
SHEET 2
B 1
C 2
A 3
SHEET 3
C 1
A 2
B 3
My
query is splitted into 3 categories
I want to have a formula to do math calculation such that data of "A" of SHEET 1 is calculated with "A" of SHEET2 irrespective of the location of "A".
When I include SHEET3, the formula should automatically identify the location of "A" or "B" or "C" and give the result corresponding to A, B or C. Since I want to bifurcate daily report and output printed. I want to use another
excel for output. How to link multiple sheets of one excel and print the output of above in
another excel?
Assume, I have 4 SHEETS, "SHEET 1", "SHEET 2", "SHEET 3" and "SHEET 4". Math calculation need to be done using all 4 sheets. If
I include "SHEET 5", the formula should ignore SHEET 1 automatically and give the results of SHEETS 2 to 5. Similarly, if I include SHEET 6, SHEET 1 and 2 need to be ignored for further calculation and SHEET 3-6 need to be used. How to write
such formula?
How to get pop up alert for multiple rows, if a specific condition is hit?

Maybe VBA Code should be a good option for you. I suggest you post you issue to
Excel for Developers forum.
The reason why we recommend posting appropriately is you will get the most qualified pool of respondents, and other partners who read the forums regularly can either share their knowledge or learn from your interaction with us.
Thanks for your understanding.
Best Regards,
Wind

Merging multiple rows in to a single row (when rows meet merging criteria)

Hi
I have a scenario to merge multiple rows in to a single rows when the data in those rows fall in merge criteria .Below is how my data is
Now the merging logic for the above rows is , we need to combine multiple rows in to a single row when the data in those rows permits us to do in that way. Simply saying , its like sandwich where we combine multiple things to a single piece.The output for
the above rows should be
Here we combined Row 1 ,2, 3 in to a single row as the data in those rows permits to merge in to single row. But the row 4 cannot be combined to any of those rows because the data in those rows doesn't permits us do a merge ( As the value of the column
JobSource for the row 4 is different from the other rows ) .
My original data has 56 columns , but for readability i kept only 9 columns.
can you please throw some idea on how to achieve this scenario. I know we need to use CTE for achieving this, but i am not able succeed in doing an iteration on multiple rows.
Appreciate your response .

Thanks for your reply .
Rule for merging is simple . First of all there is no unique row identifier for each row , the fact table is not having an identity column in the database . I called row 1 , row 2 etc in my post above only to make better explanation of my scenario.
The rule for merge is below.
1) we can combine only when the data in a column for one row is null & the data in same column for the other row is not null . It should also satisfy the condition where the data in other columns should conflict each other.
2) Data for all columns for the merging rows should not be conflicting (i.e. we should not merge the rows when the data in a column is not equal to the same column in the other row
,considering not null value)
Steps in merging the above source data :
1) Consider the case of row 1 and row 2 in the source, we can combine these rows as the data is satisfying the rule 1 for columns (Jobsource,Flight, Package,Update,Iscancelled
,Result, Severity) and columns (JobID and RuleName ) fall under rule 2. we merge these two rows in to a single row and keep in that in the table.
2) Then the resulting row is again merged with the second row which is present above by applying the rule 1 and rule 2 . Below would be output of merge operation.
Now there would be only two rows in the output . But these rows cannot be merged as the data doesn't satisfy the merge rules 2 . As Jobsource for the row 1 in the above output is "PresubmissionSource" which is not equal
to "PostSubmission" jobSource which is in row 2. So these two rows are left unmerged .So the above two rows would be the output of merge operation on my source data.
This process has to be repeated for all the rows in the table. As of now my table as 92 Million rows with 56 columns which need to be considered for merging rows. I replicated my scenario in 9 columns and 4 rows to understand better.

Get Multiple Rows into internal Table using Webdynpro Alv Display ..

Hi guys ,
I need to find out the logic for getting all the selected rows into the internal table.
When i display the ALV Output on webdypro screen .
USer Selects multiple rows for further processing ..
Ineed to get all the rows selected by user into an internal table .
Please let me know how to achive this ...
Thanks in advance for quick reply
Regards
Saurabh Goel

Hi,
You need to use the method GET_SELECTED of IF_WD_CONTEXT_NODE to get the rows selected. Also ccheck for the paramters of that method, this retruns the element set.
This meets your requirement.
Regards,
Lekha.

INSERT or UPDATE with multiple rows

Hi there!
I want to ask what I should do in the following case: I have to handle mutliple rows of data to insert OR to update into the database.
The first question is about how to decide whether I should take INSERT or UPDATE. I read here in the forum that I could take a SELECT-statement before, and, if it isn't null, I could update the resultset..if it is null I can make an INSERT-statement.
But now I a have multiple rows to update or to insert which I want to handle as a transaction (with a batch), so I don't want to check each row the way I described above. Does anyone has a hint ?
Thanks a lot in advance.

This is not a problem with java but rather a problem
with databases in general. The solution generally
depends on the data that is being operated on.
If there is a primary key involved, and most records
were expected to NOT be in the database, then you
could just insert them in blocks (transaction/batch).
Each block would fail when a primary key duplicate.
Then you can process each block as individual
l statements. The ones that fail are done as
inserts.
The reverse of the above is used if you expect most
records to be in the database. Do updates and the
break out the blocks with failures to locate the
inserts.
Keep in mind that queries for keys probably will be
faster, but that requires that your keys are ordered.
If you keys are ordered then you can get a range from
the initial data. Use that to query the database for
keys between that range (only return the keys.)
Using the returned keys you can decide whether each
h record needs to be an update or insert (presort the
data into each group and batch each group for more
speed.)
If the data is really mixed and the database supports
it then you can write a stored proc (MySQL does not)
which decides whether an insert/update is needed.
Finally if you have large amounts of data, bulk
operations especially inserts are better done with
tools supplied by the database vendor. Instead of
using JDBC to do the insert/updates you write the
output to a file and pass the file to the tool. You
might use JDBC (again with the ordered key query) to
decide which operation to do. Although faster for
large sets this is problematic due to the error
handling that you have to add.
Thanks for this, jschell. I look for your answers, because they're on the money and written well. I learn a lot from them. - MOD

Multiple rows of output

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