Problem in select statment & loop of itab.

Question

Hi all,
      I am having on ITAB1  for, ex which is having five line items or more  .
iam also using select statment SINGLE statment for 7 times ,to select values for
different data base  table.
for ex,
loop at itab.
   1---> SELECT SINGLE Z_CTRY_ORIG INTO LS_PSHDESN-Z_CTRY_ORIG FROM ZLE_PART_MST
  WHERE                           WERKS        = ITAB1-LGNUM
  AND                                 MATNR        = ITAB1-MATNR .
2---
3---
4---
endloop
i want to remove from the loop statment  and i have to select  the datas ..
can any one sugesset some possible ways....
regards
veera

Answer 1

hi,
Solution:
Never use select single in loop at itab!! for that :
Solution 1:
say ur main table is ITAB and rferring  this u want to select data from other tables.
SELECT SINGLE Z_CTRY_ORIG INTO LS_PSHDESN-Z_CTRY_ORIG FROM ZLE_PART_MST
into table itab2
FOR ALL ENTRIES IN ITAB
WHERE WERKS = ITAB-LGNUM
AND MATNR = ITAB-MATNR.
With this what will hapeen , u will get all records in itab2 which u can update itab1(master) using loop.
solution 2:
Instead of all this use JOINs in select statement properly and u can fetch data in one shot this will reduce database load as well as abap load ( More than 3 joins in SELECT stmt  are not recommeded but can be used)
I believe this is perfect solution if and only if u are giving joins on KEY fields only.  Same is applied for wherer clause.
Hope this will help u, if not revert.
Jogdand M B