Select ... Into Table

SELECT * FROM TABLE1 INTO TABLE itab1
         WHERE fld1 = ’AA’.

Select ... Appending Table

SELECT * FROM TABLE1 APPENDING TABLE itab1
         WHERE fld1 = ’AA’. 

Two statements are similar if itab1 has no entry.

But if itab1 has at least one row before select clause:

• Select ... Into Table
  The entries of internal table will be cleared before adding new records.
• Select ... Appending Table
  System don’t touch old records and append new records to internal table.