How do i remove duplicate records?

I have a table in which almost all the records have been duplicated. I want to remove the duplicates now. How do i remove them?

Hi,
Here is the select stmt which will remove duplicate rows from table.
delete table_name a
where rowid not in (select max(rowid) from tablename b where a.rep_col = b.rep_col);
Hope this Helps.
Regards,
Ganesh R

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    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.
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      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.
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    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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    HOw can I remove duplicate photos I seem to have done something wrong and have 5 duplicates of everything

    The best option in that case is to restore your iPhoto library from your backup.
    If your backup is not current it will be a lot of work and a risky operation, even with tools like iPhoto library Manager or Duplicate Annihilator.
    Before you start deleting duplicates make a backup copy of the current state, so you have a fall back option in case you delete accidentally too much.
    Old Toad has posted a list of tools to identify duplicates here:  Re: eliminating iphoto duplicates

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