How to remove a block of data in memory?

Question

hello:
there is a block of data in memory, now i should add 4 bytes in them , so i should remove some data behind, i don't know what function i should use?
i think remove some data from one place to another is copy data from one place to another , is that ok?
Best regards!
future

Answer 1

I have some records in the internal table t_int1. I want to retrieve some set records from that table and put them all in some other table, based on a single field which is not a key. Can i use READ statement to achieve this.
Could you please let me know any simple way of doin this.
Answer :
data:
itab2 like standard table of  t_int1 with header line.
Loop at t_int1.
read table t_int1 with index 1.
check ur condition----
check each line and insert it ---work out the syntax for this
IF t_int1-xyz = data1
append  line of t_int1 to itab2. or try insert
cnt = cnt + 1   -
u will get no. of records added to next itab.
else.
cnt1 = cnt1 + 1 -
u will get no. of records not added to next itab.
endif.
end loop.