ABAP Operation on Internal Tables

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COPYING (Adding Multiple Records):

  • Copy at the END of Internal Table

APPEND LINES OF <ITAB1> FROM <N1> TO <N2> TO <ITAB2>.

  • Copy From the given Location

INSERT LINES OF <ITAB1> FROM <N1> TO <N2> TO <ITAB2> INDEX <N>.

NOTE: INSERT

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With NO INDEX Acts as APPEND Only.

FROM <N1> TO <N2> is Optional, If We Ignore it, All the Records are Transferred, Else Only the records from <N1> TO <N2> are transferred.

ADDING SINGLE RECORD:

  • ADD at the END of Internal Table

ADDPEND <WA> TO <ITAB>.

  • ADD at the given Location

INSERT <WA> INTO <ITAB> INDEX <N>. ( N>0 )

NOTE: INSERT With NO INDEX Acts as APPEND Only.

NOTE: Fill the Data into <WA> and Transfer to <ITAB>.

Finding No Of Records

DESCRIBE TABLE <ITAB> LINES <V_LINES> ( V_LINES TYPE I).

The no of records from <ITAB> is collected into V_LINES.

SORTING: To arrange the records into Ascending / Descending Groups.

SORT <ITAB> ASCENDING / DESCENDING BY <F1><F2>……

NOTE: Sorting is Asecnding by Default.

NOTE: The default key is made up of the Non-Numeric fields of the table line in the order in which they occur.

Accessing/ Reading Single Record:

READ TABLE <ITAB> INTO <WA> INDEX <N>.

OR

READ TABLE <ITAB> INTO <WA> WITH KEY <Condition> BINARY SEARCH.

NOTE: Make sure that the Internal Tabel is Sorted to Apply BINARY SEARCH.

Accessing Multiple Records:

LOOP AT >ITAB> INTO <WA> FROM <N1> TO <N2>.

*Process the Data from <WA>

ENDLOOP.

OR

LOOP AT <ITAB> INTO <WA> WHERE <Condition>

*Process the Data From <WA>

ENDLOOP.

DELETING Records:

Single Record: DELETE <ITAB>

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INDEX <N>.

Multiple Record: DELETE <ITAB> WHERE <Condition>

DELETE <ITAB> FROM <N1> TO <N2>.

DELETING ADJACENT DUPLICATES:

NOTE: Make Sure that the Duplicates should be Adjacent, which can be done through SORTING.

So that, Sorting the <ITAB> is Mandatory.

NOTE: The Duplication of Records(s) depends on the comparing fileds.

DELETE ADJACENT DUPLICATES FROM <ITAB>

COMPARING <F1><F2>……..

NOTE: Make sure that the <ITAB> is Sorted by all the comparing fields in the same order…

MODIFY:

Either Single/Multiple records modification is always through <WA>.

*Fill the new data into <WA> fields.

MODIFY <ITAB> FROM <WA> TRANSPORTING <F1><F2>…

WHERE <Condition>.

NOTE: The Where condition, decides the no of records to be modified.

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