Read data : for all entries

Question

wht happens if v read data using FOR ALL ENTRIES in select statement

Answer 1

Hi Ankur,
You can only use FOR ALL ENTRIES IN ...WHERE ...in a SELECT statement.
SELECT ... FOR ALL ENTRIES IN itab WHERE cond returns the union of the solution sets of all SELECT statements that would result if you wrote a separate statement for each line of the internal table replacing the symbol itab-f with the corresponding value of component f in the WHERE condition.Duplicates are discarded from the result set. If the internal table itab does not contain any entries, the system treats the statement as though there were no WHERE cond condition, and selects all records (in the current client).
For Example:
SELECT *
  FROM SCARR
  INTO TABLE t_scarr.
LOOP AT t_SCARR INTO wa_scarr.
  SELECT SINGLE *
    FROM sflight
    INTO wa_sflight
   WHERE carrid EQ wa_scarr-carrid.
  APPEND wa_sflight TO t_sflight.
ENDLOOP.
Instead of the Above use below code:
SELECT *
  FROM SCARR
  INTO TABLE t_scarr.
SELECT *
  FROM SFLIGHT
  INTO TABLE t_sflight
   FOR ALL ENTRIES IN scARR
WHERE carrid EQ t_scarr.
this condition, return all entries of the sflight
Refer the Below Links for more Info:
http://help.sap.com/saphelp_nw04/helpdata/en/fc/eb3a1f358411d1829f0000e829fbfe/content.htm
Regards,
Sunil