compare records within single internal table

[Former Member]

Can we compare records within single internal table.how to do it.

[Former Member]

Can we compare records within single internal table.how to do it.

[Former Member]

loop at it into wa. "read same itenal table

read table itab from wa with key wa-field wa-field.

endloop.

[Former Member]

Do you want to compare the same field or different fields from the internal table.?

Regards,

Atish

[Former Member]

data : l_lines type sy-tabix.
describe table itab lines l_lines.
loop at itab into watab.
l_tabix = sy-tabix + 1.
loop at itab into wtemp from l_tabix to l_lines where matnr = watab-matnr.
write :/ 'duplicate record exists'.
endloop.
clear : l_tabix,
          watab,
          wtemp.
endloop.

[Former Member]

Hi Suganya,

Yes, we can compare records within single internal table.

ex:

Case1: Want to compare only the key fields.

i_tab is the internal table without work area.

w_tab is the external work area for the table i_tab.

w2_tab is the second external work area for the table i_tab.

loop at i_tab into w_tab.

loop at i_tab into w2_tab where field1 = w_tab-field and

field2 = w_tab-field.

• If the control enter the second loop, the duplicate record exits.

endloop.

endloop.

If u want to count the number of duplicate records exist in the single internal record, then set a counter.

ex : i_tab is the internal table without work area.

w_tab is the external work area for the table i_tab.

w2_tab is the second external work area for the table i_tab.

• Declare the structure to count the dup records in the same internal table

types : begin of s_dup_cnt ,

record type i,

count type i.

end of s_dup_cnt.

• Declare the internal table & work area

data : t_dup_cnt type standard table of s_dup_cnt.

w_dup_cnt type s_dup_cnt.

loop at i_tab into w_tab.

• get the record number

w_dup_cnt-record = SY-TABIX.

w_dup_cnt-count = 0.

loop at i_tab into w2_tab where field1 = w_tab-field and

field2 = w_tab-field.

w_dup_cnt-count = w_dup_cnt-count + 1.

endloop.

append w_dup_cnt to t_dup_cnt.

clear w_dup_cnt.

endloop.

loop at t_dup_cnt into w_dup_cnt.

write w_dup_cnt-record .

write w_dup_cnt-count.

endloop.

• t_dup_cnt now contains the record number & the number of times the record repeated * in the same internal table,