How do i transfer data from one internal tabe to another.

Question

Hi All,
         How do i transfer data from one internal tabe to another.
         Can i do it ebven if he tables are different in structure.
Please Advice.
Thanks in advance.

Answer 1

Hi Saket Tiwari,
I hope the earlier post by kashyap is good enough an answer. anywas in addition to it let me give a detailed
explanation of how you can populate an internal table.
1) Append data line by line.
     Syntax :  APPEND [<wa> TO / INITIAL LINE TO] <itab>.
this appends new line to internal table <itab>.
2) Using COLLECT statement.
             COLLECT is another form of statement used for populating the internal tables.  Generally COLLECT is used while inserting lines into an internal table with unique standard key. The syntax for COLLECT statement is as shown
     Syntax : COLLECT [<wa> INTO] <itab>.
3) Using INSERT statement
     Syntax  INSERT [<wa> INTO / INITIAL LINE INTO] <itab> [index <idx>].
INSERT statement adds a line/work area to the internal table. You can specify the position at which the new line is to be added by using the INDEX clause with the INSERT statement.
Now coming to your request..
To append part or all of an internal table
     Syntax
              APPEND LINES OF <itab1> [FROM <n1>] [TO <n2>] TO <itab2>.
*     Note:
Without the FROM and TO options, this statement appends the entire table <itab1> to <itab2>.*
b) To insert part or all of an internal table into another internal table
     Syntax
          INSERT LINES OF <itab1> [FROM <n1>] [TO <n2>]
          INTO <itab2> [INDEX <idx>].
c) Using Move statement.
To copy entire contents of one table into another in one execution
     Syntax MOVE  <itab1> To <itab2>.
               OR
          <itab1> = <itab2>.
but u hav to be careful because he contents of itab2 will eb overwritten on the execution of this statement.
These copy the contents of ITAB1 to ITAB2. Incase of internal tables with header line we have to use [] inorder to distinguish from work area. So, to copy contents of internal tables with header line  the syntax becomes,
ITAB1[] = ITAB2[].
Coming to the letter part of your question, Yes, we can copy values between tables having different structures.
for this we use    
                            MOVE-CORRESPONDING <itab1> TO <itab2>
    this executes the statement for their header lines. Searches for the sub-fields which occur both in itab1 and itab2 and then generates, for all relevant field pairs which correspond to the
        sub-fields ni , statements of the form MOVE itab1-ni TO itab2-ni. The other fields remain unchanged.
I hope the information provided has been of your help.
Reward if useful.
Regards,
Jose