About for all entries

Question

can u give the information abt the FOR ALL ENTRIES and the conditions.

Answer 1

HI
GOOD
Use of FOR ALL Entries
Outer join can be created using this addition to the where clause in a select statement. It speeds up the performance tremendously, but the cons of using this variation are listed below
Duplicates are automatically removed from the resulting data set. Hence care should be taken that the unique key of the detail line items should be given in the select statement.
If the table on which the For All Entries IN clause is based is empty, all rows are selected into the destination table. Hence it is advisable to check before-hand that the first table is not empty.
If the table on which the For All Entries IN clause is based is very large, the performance will go down instead of improving. Hence attempt should be made to keep the table size to a moderate level.
Not Recommended
            Loop at int_cntry.
             Select single * from zfligh into int_fligh
where cntry = int_cntry-cntry.
Append int_fligh.
            Endloop.
Recommended
            Select * from zfligh appending table int_fligh
            For all entries in int_cntry
            Where cntry = int_cntry-cntry.
GO THROUGH THESE LINKS
http://www.thespot4sap.com/articles/SAPABAPPerformanceTuning_ForAllEntries.asp
CODE
Code to demonstrate Select FOR ALL ENTRIES command
The FOR ALL ENTRIES comand only retrieves data which matches  
entries within a particular internal table.
TYPES: begin of t_bkpf,
include structure bkpf.
  bukrs like bkpf-bukrs,
  belnr like bkpf-belnr,
  gjahr like bkpf-gjahr,
  BLDAT like bkpf-BLDAT,
  monat like bkpf-monat,
  budat like bkpf-budat,
  xblnr like bkpf-xblnr,
  awtyp like bkpf-awtyp,
  awkey like bkpf-awkey,
end of t_bkpf.
data: it_bkpf type standard table of t_bkpf initial size 0,
      wa_bkpf type t_bkpf.
TYPES: begin of t_bseg,
*include structure bseg.
  bukrs     like bseg-bukrs,
  belnr     like bseg-belnr,
  gjahr     like bseg-gjahr,
  buzei     like bseg-buzei,
  mwskz     LIKE bseg-mwskz,         "Tax code
  umsks     LIKE bseg-umsks,         "Special G/L transaction type
  prctr     LIKE bseg-prctr,         "Profit Centre       
  hkont     LIKE bseg-hkont,         "G/L account
  xauto     like bseg-xauto,
  koart     like bseg-koart,
  dmbtr     like bseg-dmbtr,
  mwart     like bseg-mwart,
  hwbas     like bseg-hwbas,
  aufnr     like bseg-aufnr,
  projk     like bseg-projk,
  shkzg     like bseg-shkzg,
  kokrs     like bseg-kokrs,
end of t_bseg.
data: it_bseg type standard table of t_bseg initial size 0,
      wa_bseg type t_bseg.
select bukrs belnr gjahr BLDAT monat budat xblnr awtyp awkey
  up to 100 rows
  from bkpf
  into table it_bkpf.
if sy-subrc EQ 0.
  select bukrs belnr gjahr buzei mwskz umsks prctr hkont xauto koart
         dmbtr mwart hwbas aufnr projk shkzg kokrs
    from bseg
    into table it_bseg
    FOR ALL ENTRIES in it_bkpf
    where bukrs eq it_bkpf-bukrs and
          belnr eq it_bkpf-belnr and
          gjahr eq it_bkpf-gjahr.
endif.
CODE
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 sflight INTO wa_sflight 
                 FOR ALL ENTRIES IN ftab 
                 WHERE CARRID = ftab-carrid AND 
                  CONNID = ftab-connid AND 
                         fldate = '20010228'. 
    this condition, return all entries of the sflight 
THANKS
MRUTYUN