How to prevent duplicate records
Hello all,
This is just a general query. How do we prevent duplicate records at data target level(ODS/InfoCube).
Thanks
S N
Hi,
for ODS you can either specify in settings option "unique records" (only first combination of keys is saved, second one throws error message) or you can define "overwrite" for update rules to ODS (last occurrence of record is saved).
For InfoCubes I think there isn't such setting and there is no possibility of overwriting existing records. So you have to load first to an ODS object to ensure unique records and update from ODS to InfoCube.
Best regards,
Björn
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How to delete duplicate records in 10 G.
how to delete duplicate records in 10 G.
--Here is one way to do it using a second table
create table temp1
(col1 char(1));
--Table created.
insert into temp1 (col1) values('A');
insert into temp1 (col1) values('B');
insert into temp1 (col1) values('B');
--1 row created.
--1 row created.
--1 row created.
create table temp2 as select distinct * from temp1;
--Table created.
--now you have a second table with no duplicates
--truncate your old table
truncate table temp1;
--Table truncated.
--and reload it with data from the new table
insert into temp1 select * from temp2;
--2 rows created.
--then drop the temp2 table
drop table temp2 -
How to remove duplicates records from output ?
how to remove duplicates records from output ? i used delete adjacent but duplicates records are coming again ..suggest me
hi shruthi,
thanks for ur answer ..but duplicates records coming again
here is my code >> plz check it out
*& Report ZCRM_TROUBLE_TICKET
REPORT zcrm_trouble_ticket.
TYPES : BEGIN OF ty_qmih,
qmnum TYPE qmnum,
equnr TYPE equnr,
iloan TYPE iloan,
ausvn TYPE ausvn,
ausbs TYPE ausbs,
auztv TYPE auztv,
auztb TYPE auztb,
iwerk TYPE iwerk,
END OF ty_qmih,
BEGIN OF ty_qmel,
qmnum TYPE qmnum,
qmtxt TYPE qmtxt,
indtx TYPE indltx,
priok TYPE priok,
strmn TYPE strmn,
strur TYPE strur,
ltrmn TYPE ltrmn,
ltrur TYPE ltrur,
objnr TYPE qmobjnr,
arbpl TYPE lgwid,
vkorg TYPE vkorg,
vtweg TYPE vtweg,
spart TYPE spart,
END OF ty_qmel,
BEGIN OF ty_ihpa,
parnr TYPE i_parnr,
parvw TYPE parvw,
objnr TYPE qmobjnr,
END OF ty_ihpa,
BEGIN OF ty_crhd,
arbpl TYPE arbpl,
objid TYPE cr_objid,
END OF ty_crhd,
BEGIN OF ty_crtx,
ktext TYPE cr_ktext,
objid TYPE cr_objid,
END OF ty_crtx,
BEGIN OF ty_qmfe,
fecod TYPE fecod,
fegrp TYPE fegrp,
qmnum TYPE qmnum,
END OF ty_qmfe,
BEGIN OF ty_qmur,
urcod TYPE urcod,
urgrp TYPE urgrp,
urtxt TYPE urstx,
qmnum TYPE qmnum,
END OF ty_qmur,
BEGIN OF ty_iloa,
tplnr TYPE tplnr,
iloan TYPE iloan,
END OF ty_iloa,
BEGIN OF ty_output,
qmnum TYPE qmnum,
equnr TYPE equnr,
iloan TYPE iloan,
ausvn TYPE ausvn,
ausbs TYPE ausbs,
auztv TYPE auztv,
auztb TYPE auztb,
iwerk TYPE iwerk,
qmtxt TYPE qmtxt,
indtx TYPE indltx,
priok TYPE priok,
strmn TYPE strmn,
strur TYPE strur,
ltrmn TYPE ltrmn,
ltrur TYPE ltrur,
objnr TYPE qmobjnr,
arbpl TYPE lgwid,
vkorg TYPE vkorg,
vtweg TYPE vtweg,
spart TYPE spart,
parnr TYPE i_parnr,
parvw TYPE parvw,
arbpl TYPE arbpl,
objid TYPE cr_objid,
arbpl1 TYPE arbpl,
ktext TYPE cr_ktext,
fecod TYPE fecod,
fegrp TYPE fegrp,
urcod TYPE urcod,
urgrp TYPE urgrp,
urtxt TYPE urstx,
tplnr TYPE tplnr,
END OF ty_output.
DATA : it_qmih TYPE STANDARD TABLE OF ty_qmih,
it_qmel TYPE STANDARD TABLE OF ty_qmel,
it_ihpa TYPE STANDARD TABLE OF ty_ihpa,
it_crhd TYPE STANDARD TABLE OF ty_crhd,
it_crtx TYPE STANDARD TABLE OF ty_crtx,
it_qmfe TYPE STANDARD TABLE OF ty_qmfe,
it_qmur TYPE STANDARD TABLE OF ty_qmur,
it_iloa TYPE STANDARD TABLE OF ty_iloa,
it_output TYPE STANDARD TABLE OF ty_output,
wa_qmih TYPE ty_qmih,
wa_qmel TYPE ty_qmel,
wa_ihpa TYPE ty_ihpa,
wa_crhd TYPE ty_crhd,
wa_crtx TYPE ty_crtx,
wa_qmfe TYPE ty_qmfe,
wa_qmur TYPE ty_qmur,
wa_iloa TYPE ty_iloa,
wa_output TYPE ty_output.
INITIALIZATION.
REFRESH : it_qmih,
it_qmel,
it_ihpa,
it_crhd,
it_crtx,
it_qmfe,
it_qmur,
it_iloa,
it_output.
CLEAR: wa_qmih,
wa_qmel,
wa_ihpa,
wa_crhd,
wa_crtx,
wa_qmfe,
wa_qmur,
wa_iloa,
wa_output.
start-of-selection.
SELECT qmnum
equnr
iloan
ausvn
ausbs
auztv
auztb
iwerk
FROM qmih
INTO TABLE it_qmih.
SORT it_qmih BY qmnum .
DELETE ADJACENT DUPLICATES FROM it_qmih COMPARING qmnum equnr iloan ausvn ausbs auztv auztb iwerk.
SELECT qmnum
qmtxt
indtx
priok
strmn
strur
ltrmn
ltrur
objnr
arbpl
vkorg
vtweg
spart
FROM qmel
INTO TABLE it_qmel
FOR ALL ENTRIES IN it_qmih
WHERE qmnum = it_qmih-qmnum.
SORT it_qmel BY qmnum.
DELETE ADJACENT DUPLICATES FROM it_qmel COMPARING qmnum
qmtxt
indtx
strmn
strur
ltrmn
ltrur
objnr
arbpl
vkorg
vtweg
spart.
IF it_qmel IS NOT INITIAL.
SELECT parnr
parvw
objnr
FROM ihpa
INTO TABLE it_ihpa
FOR ALL ENTRIES IN it_qmel
WHERE objnr = it_qmel-objnr.
ENDIF.
DELETE ADJACENT DUPLICATES FROM it_ihpa COMPARING parnr
parvw
objnr.
IF it_qmel IS NOT INITIAL.
SELECT arbpl
objid
FROM crhd
INTO TABLE it_crhd
FOR ALL ENTRIES IN it_qmel
WHERE objid = it_qmel-arbpl.
ENDIF.
DELETE ADJACENT DUPLICATES FROM it_crhd COMPARING arbpl
objid.
IF it_qmel IS NOT INITIAL.
SELECT ktext
objid
FROM crtx
INTO TABLE it_crtx
FOR ALL ENTRIES IN it_crhd
WHERE objid = it_crhd-objid.
ENDIF.
DELETE ADJACENT DUPLICATES FROM it_crtx COMPARING ktext
objid.
IF it_qmih IS NOT INITIAL.
SELECT fecod
fegrp
qmnum
FROM qmfe
INTO TABLE it_qmfe
FOR ALL ENTRIES IN it_qmih
WHERE qmnum = it_qmih-qmnum.
ENDIF.
SORT it_qmfe BY qmnum.
DELETE ADJACENT DUPLICATES FROM it_qmfe COMPARING fecod
fegrp.
IF it_qmih IS NOT INITIAL.
SELECT urcod
urgrp
urtxt
qmnum
FROM qmur
INTO TABLE it_qmur
FOR ALL ENTRIES IN it_qmih
WHERE qmnum = it_qmih-qmnum.
ENDIF.
SORT it_qmur BY qmnum.
DELETE ADJACENT DUPLICATES FROM it_qmur COMPARING urcod
urgrp
urtxt.
IF it_qmih IS NOT INITIAL.
SELECT tplnr
iloan
FROM iloa
INTO TABLE it_iloa
FOR ALL ENTRIES IN it_qmih
WHERE iloan = it_qmih-iloan.
ENDIF.
DELETE ADJACENT DUPLICATES FROM it_iloa COMPARING tplnr
iloan.
LOOP AT it_qmih INTO wa_qmih.
wa_output-qmnum = wa_qmih-qmnum.
wa_output-equnr = wa_qmih-equnr.
wa_output-iloan = wa_qmih-iloan.
wa_output-ausvn = wa_qmih-ausvn.
wa_output-ausbs = wa_qmih-ausbs.
wa_output-auztv = wa_qmih-auztv.
wa_output-auztb = wa_qmih-auztb.
wa_output-iwerk = wa_qmih-iwerk.
APPEND wa_output TO it_output.
CLEAR wa_output.
READ TABLE it_qmel INTO wa_qmel WITH KEY qmnum = wa_qmih-qmnum.
wa_output-qmtxt = wa_qmel-qmtxt.
wa_output-indtx = wa_qmel-indtx.
wa_output-priok = wa_qmel-priok.
wa_output-strmn = wa_qmel-strmn.
wa_output-strur = wa_qmel-strur.
wa_output-ltrmn = wa_qmel-ltrmn.
wa_output-ltrur = wa_qmel-ltrur.
wa_output-objnr = wa_qmel-objnr.
wa_output-arbpl = wa_qmel-arbpl.
wa_output-vkorg = wa_qmel-vkorg.
wa_output-vtweg = wa_qmel-vtweg.
wa_output-spart = wa_qmel-spart.
APPEND wa_output TO it_output.
CLEAR wa_output.
READ TABLE it_ihpa INTO wa_ihpa WITH KEY objnr = wa_qmel-objnr.
wa_output-parnr = wa_ihpa-parnr.
wa_output-parvw = wa_ihpa-parvw.
APPEND wa_output TO it_output.
CLEAR wa_output.
READ TABLE it_crhd INTO wa_crhd WITH KEY objid = wa_qmel-arbpl.
wa_output-arbpl = wa_crhd-arbpl.
APPEND wa_output TO it_output.
CLEAR wa_output.
READ TABLE it_crtx INTO wa_crtx WITH KEY objid = wa_crhd-objid.
wa_output-ktext = wa_crtx-ktext.
APPEND wa_output TO it_output.
CLEAR wa_output.
READ TABLE it_qmfe INTO wa_qmfe WITH KEY qmnum = wa_qmih-qmnum.
wa_output-fecod = wa_qmfe-fecod.
wa_output-fegrp = wa_qmfe-fegrp.
APPEND wa_output TO it_output.
CLEAR wa_output.
READ TABLE it_qmur INTO wa_qmur WITH KEY qmnum = wa_qmih-qmnum.
wa_output-urcod = wa_qmur-urcod.
wa_output-urgrp = wa_qmur-urgrp.
wa_output-urtxt = wa_qmur-urtxt.
APPEND wa_output TO it_output.
CLEAR wa_output.
READ TABLE it_iloa INTO wa_iloa WITH KEY iloan = wa_qmih-iloan.
wa_output-tplnr = wa_iloa-tplnr.
APPEND wa_output TO it_output.
CLEAR wa_output.
ENDLOOP.
DELETE ADJACENT DUPLICATES FROM it_output COMPARING qmnum
equnr
ausvn
ausbs
auztv
auztb
iwerk
qmtxt
indtx
priok
strmn
strur
ltrmn
ltrur
vkorg
vtweg
spart
parnr
parvw
arbpl
ktext
fecod
fegrp
urcod
urgrp
urtxt
tplnr.
*CALL FUNCTION 'STATUS_TEXT_EDIT'
EXPORTING
CLIENT = SY-MANDT
FLG_USER_STAT = ' '
objnr =
ONLY_ACTIVE = 'X'
spras = en
BYPASS_BUFFER = ' '
IMPORTING
ANW_STAT_EXISTING =
E_STSMA =
LINE =
USER_LINE =
STONR =
EXCEPTIONS
OBJECT_NOT_FOUND = 1
OTHERS = 2
*IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
*ENDIF.
*CALL FUNCTION 'READ_TEXT'
EXPORTING
CLIENT = SY-MANDT
id =
language =
name =
object =
ARCHIVE_HANDLE = 0
LOCAL_CAT = ' '
IMPORTING
HEADER =
tables
lines =
EXCEPTIONS
ID = 1
LANGUAGE = 2
NAME = 3
NOT_FOUND = 4
OBJECT = 5
REFERENCE_CHECK = 6
WRONG_ACCESS_TO_ARCHIVE = 7
OTHERS = 8
*IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
*ENDIF.
*LOOP AT IT_OUTPUT INTO WA_OUTPUT.
*WRITE : / WA_OUTPUT-qmnum,
WA_OUTPUT-equnr,
WA_OUTPUT-iloan,
WA_OUTPUT-ausvn,
WA_OUTPUT-ausbs,
WA_OUTPUT-auztv,
WA_OUTPUT-auztb,
WA_OUTPUT-qmtxt,
WA_OUTPUT-indtx,
WA_OUTPUT-strmn,
WA_OUTPUT-strur,
WA_OUTPUT-ltrmn,
WA_OUTPUT-ltrur,
WA_OUTPUT-objnr,
WA_OUTPUT-arbpl,
WA_OUTPUT-parnr,
WA_OUTPUT-parvw,
WA_OUTPUT-objid,
WA_OUTPUT-ktext,
WA_OUTPUT-fecod,
WA_OUTPUT-fegrp,
WA_OUTPUT-urcod,
WA_OUTPUT-urgrp,
WA_OUTPUT-urtxt,
WA_OUTPUT-tplnr.
*ENDLOOP.
CALL FUNCTION 'GUI_DOWNLOAD'
EXPORTING
BIN_FILESIZE =
filename = 'E:\CRM1.TXT'
FILETYPE = 'ASC'
APPEND = ' '
write_field_separator = '|'
HEADER = '00'
TRUNC_TRAILING_BLANKS = ' '
WRITE_LF = 'X'
COL_SELECT = ' '
COL_SELECT_MASK = ' '
DAT_MODE = ' '
CONFIRM_OVERWRITE = ' '
NO_AUTH_CHECK = ' '
CODEPAGE = ' '
IGNORE_CERR = ABAP_TRUE
REPLACEMENT = '#'
WRITE_BOM = ' '
TRUNC_TRAILING_BLANKS_EOL = 'X'
WK1_N_FORMAT = ' '
WK1_N_SIZE = ' '
WK1_T_FORMAT = ' '
WK1_T_SIZE = ' '
WRITE_LF_AFTER_LAST_LINE = ABAP_TRUE
IMPORTING
FILELENGTH =
TABLES
data_tab = it_output
FIELDNAMES =
EXCEPTIONS
FILE_WRITE_ERROR = 1
NO_BATCH = 2
GUI_REFUSE_FILETRANSFER = 3
INVALID_TYPE = 4
NO_AUTHORITY = 5
UNKNOWN_ERROR = 6
HEADER_NOT_ALLOWED = 7
SEPARATOR_NOT_ALLOWED = 8
FILESIZE_NOT_ALLOWED = 9
HEADER_TOO_LONG = 10
DP_ERROR_CREATE = 11
DP_ERROR_SEND = 12
DP_ERROR_WRITE = 13
UNKNOWN_DP_ERROR = 14
ACCESS_DENIED = 15
DP_OUT_OF_MEMORY = 16
DISK_FULL = 17
DP_TIMEOUT = 18
FILE_NOT_FOUND = 19
DATAPROVIDER_EXCEPTION = 20
CONTROL_FLUSH_ERROR = 21
OTHERS = 22
IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF. -
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select
e.id,
e.seqNo,
e.name,
d.resDate,
d.details
from employees e,
((select * from dept)union(select * from dept_hist)) d
join on d.id=e.id and e.seqno=d.seqno
but this returing duplicate records.
Could anyone please tell me how to avoid duplicate records of this query.Actually it is like if the record is processed it will be moved to hist table, so both table will not have same records and I need the record from both the tables so i have done the union of both the tables, so d will have the union of both records.
But I am getting duplicate records if even I am distinct. -
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Dear All
I am using Forms 10g.
I have a detail block.
There is a column called Ip_Address.
There i want to prevent duplicate entry .
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EMP(DETAIL)
the associated fieds in master block DEPT.DEPT_NO,in detail EMP.EMP_ID .
I have done' Kevin D Clarke’s calculated item ' both in master and detail block
its working fine for master block but in case of detail block its only respond to the current session(i.e. if the new value is inserted or save it will restrict another record to be inserted of that last record's value),it does not restrict duplicate value enter ,checking with other existing records(which are saved in earlier session,though after query it is shown on the form)
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Hello,
Can someone suggest to me how I can check a form such that it does not have a duplicate record, when a user either saves or creates the record?
In particular, I am looking at 2 fields in a record as the criterai for determine duplicity:
select PEOPLE_ID, DEPT_ID
from AN_PEOPLEDEPT
where PEOPLE_ID = :P12_PEOPLE_ID and
DEPT_ID = :P12_DEPT_ID
It would be nice to know how to make this work with only one validation in a page definition.
Thank you for your comments.
Regards,
Colin.1. Create a validation.
2. Choose "Page Level"
3. Choose "SQL"
4. Choose "Exists"
5. Give it a name and choose "Inline in notification"
6. Enter your query, simaler to the one I posted before but using your table name and your items
That's it. Essentially, you can create validations that display the error next to the item (won't work for you as it's just one item), display the error on an error page forcing the user to go back a page to edit the form (not ideal), or in the Notification area at the top of the page (as determined by your page template). The latter is the one your want. The validation will query your table based on the values of your two items. If there is a row that matches the values of the 2 items, then it will show the form again with an error message at the top. Just try following the steps I detailed above. After you create a validation or two, this should make sense.
Please listen to my advice about adding a unique index on the table as well. An ORA-XXXX error is ugly which is why I'm glad you're doing it with an HTML DB validation too, but the unique index will insure that you NEVER have dupes in your table. I can't stress this enough. Think about the check engine light on a modern car. It gives you a "pretty" reminder that something is wrong (low oil, too hot), but will typically shut the engine down before any real damage is done. We want the friendly reminder so we can get it to a mechanic, but the real safe-guard is under the covers and prevents any real damage from occuring, even if people ignore the warning light (no "wife ignoring the low oil light" jokes here please).
Tyler -
hi
can any one tell me
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>>
Although you cannot normally read other records in a multi row block without navigating to them, I have found a cunning method to do this validation using the power of calculation properties. You need three extra hidden fields, two of which have calculation properties, and a little function. (If you want to see how it works, try making the hidden fields visible).
Form program unit:
function COMPARISON (in1 number, in2 number) is
if in1 = in2 then
return(1);
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return(0);
end if;
end;
3 new hidden fields:
CONTROL.PK_COPY
DATABLOCK.MATCH_FOUND
calculation mode: formula
formula: COMPARISON(:control.PK_COPY, :datablock.PK)
CONTROL.NUMBER_OF_MATCHES
calculation_mode: summary
summary_function: Sum
summarised_block: DATABLOCK
summarised_item: MATCH_FOUND
WHEN_VALIDATE_ITEM on DATABLOCK.PK
:control.pk_copy := :datablock.pk;
if :control.number_of_matches > 1 then
message('matching key found');
end if;
(DATABLOCK must have query_all_records = TRUE)
<<
what do i have to name my fields and what to do in each field?
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Dear Experts
We have a situation like where we have duplicate records with same start and end dates in IT2006. This is because of the incorrect configuration which we have corrected now, but we need to do a clean-up for the existing duplicate records. Any idea on how to clean it? I ran report RPTKOK00 to find these duplicates but I could not delete the duplicate/inconsistenct record using report RPTBPC10 or HNZUPTC0, i Could only delete the deductions happened in the record.
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Vignesh.You could probably use se16n to identify the duplicates and create the list of quotas to delete, and you could probably use t-code lsmw to write up a script to delete them, but be aware that you can't delete a Quota if it's been deducted from.
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How to delete duplicate records in cube
Hi,
can u help me how to delete the duplicate records in my cube
and tell me some predifined cubes and data sourcess for MM and SD modulesHi Anne,
about "duplicate records" could you be more precise?.
The must be at least one different Characteristic to distinguish one record from the other (at least Request ID). In order to delete Data from InfoCubes (selectively) use ABAP Report RSDRD_DELETE_FACTS (be carefull it does not request any confirmation as in RSA1 ...).
About MM and SD Cubes see RSA1 -> Business Content -> InfoProvider by InfoAreas. See also for MetadataRepository about the same InfoProviders.
About DataSources just execute TCode LBWE in you source sys: there you see all LO-Cockipt Extrators.
Hope it helps (and if so remember reward points)
GFV -
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Hi Experts,
I had created an infoset and query in my sap, but I want to delete some duplicate records before the list out put.Please can we add some further codes in the Extras code to delete duplicates? And how do it? Would you please give me a simple brief.
JoeHi,
You can try to restrict in the filter area in query designer with the values for characteristic which gives correct
result.
But still i would suggest that in the cube you keep not the duplicate records as this is not your requirement and giving
you wrong result.
So you can reload the correct records in the cube inorder to avoid such problems even in future.
Regards,
Amit -
How to avoid duplicate record in a file to file
Hi Guys,
Could you please provide a soultion
in order to avoid duplicate entries in a flat file based on key field.
i request in terms of standard functions
either at message mappingf level or by configuring the file adapter.
warm regards
mahesh.hi mahesh,
write module processor for checking the duplicate record in file adapter
or
With a JAVA/ABAP mapping u can eliminate the duplicate records
and check this links
Re: How to Handle this "Duplicate Records"
Duplicate records
Ignoring Duplicate Records--urgent
Re: Duplicate records frequently occurred
Re: Reg ODS JUNK DATA
http://help.sap.com/saphelp_nw2004s/helpdata/en/d0/538f3b294a7f2de10000000a11402f/frameset.htm
regards
srinivas -
Hi All,
I have list with some Lookup columns like City, Pin, and Text Column Name. All these are required columns.
Now I want to prevent duplicates while submitting InfoPath form if a Combination of City,Pin & Name. (like a Composite primary in Database is used.)
Can some one help me on how to achieve this using InfoPath 2010 Rules, writing rule in Xpath.
Thanks in Advance.1. Add a secondary data connection to the list where the form will be submitted.
2. Prior to submit via rules, set the query fields in the above connection: City, Pin & Name with values entered in the form. Query the data source and check if the result has values.
3. Show error messages accordingly if exists else continue with Submit.
This post is my own opinion and does not necessarily reflect the opinion or view of Slalom. -
How to delete Duplicate records from the informatica target using mapping?
Hi, I have a scenario like below: In my mapping I have a source, which may containg unique records or duplicate records. Source and target are different tables. I have a target in my mapping which contains duplicate records. Using Mapping I have to delete the duplicate records in the target table. Target table does not contain any surrogate key. We can use target table as a look up table, but target table cannot be used as source in the mapping. We cannot use post SQL.
Hi All, I have multiple flat files which i need to load in a single table.I did that using indirect option at session level.But need to dig out on how to populate substring of header in name column in target table. i have two columns Id and Name. in all input file I have only one column 'id' with header like H|ABCD|Date. I need to populate target like below example. File 1 File2 H|ABCD|Date. H|EFGH|Date.1 42 5 3 6 Target tale: Id Name1 ABCD2 ABCD3 ABCD4 EFGH5 EFGH6 EFGH can anyone help on what should be the logic to get this data in a table in informatica.
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How to remove duplicate records? Please help!
^
Dear Friends
I am new comer to this forum and had a simple SQL question. I would appreciate if anyone can help.
Many Thanx!
[email protected]
The Question:
Suppose we have some interviewers who specify the times they are available. At each interview 2 interviewers must be present.
A relation is set up to contain the available times for each interviewer, which has these fields: interviewerID, date, time. For example:
1, 14/12/04, 9:00-10:00
1, 14/12/04, 12:00-1:00
2, 12/11/04, 11:00-12:00
etc.
Then how can we write a SQL query that produces the times during which 2 interviewers are available?
A Possible Answer:
The following query produces the times during which 2 interviewers are available, however it has duplicate records:
SELECT a1.interviewerID, a2.interviewerID, a1.date, a1.time
FROM AvailabileTimes as a1, AvailableTimes as a2
WHERE a1.date = a2.date AND a1.time = a2.time AND a1.interviewerID <> a2.interviewerID
An example of the output is:
1, 2, 12/12/04, 10:00-11:00
1, 3, 14/10/03, 12:00-1:00
2, 1, 12/12/04, 10:00-11:00
etc.
where line 3 is a duplicate of line 1 (only the place of interviewerID is changed)Thanx scott for your quick reply!!
this solves the problem for now, and is a very good idea!
But I was told this might have problems if interviewID field is later changed to something that contains letters instead of a pure numeric value e.g. staffAB-01-ZC.
Do you know what I should do to have a long term solution?
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