What this SQL statement is doing?

Question

Hi ABAPers,
Can somebody help me in understanding what the below SQL statement is doing..
  SELECT * FROM /BIC/ADSO00 AS tb1
      INNER JOIN /BIC/PMASTER as tbl2
      ON tbl1~field1 = tbl2~field1
      AND tbl12~field2 = tbl2~field2
      INTO CORRESPONDING FIELDS OF TABLE gt_itab
      FOR ALL ENTRIES IN SOURCE_PACKAGE
      WHERE tbl1~field3 = SOURCE_PACKAGE-field3
      AND tbl1~field4 BETWEEN lv_minper AND lv_maxper
      AND tbl1~field5 = SOURCE_PACKAGE-field5
      AND tbl1~field6 = '0100'
      AND tbl2~OBJVERS = 'A'.
thanks in advance !!
Bharath S

Answer 1

Hi Bharath,
tb1 is your /BIC/ADSO00 table
tbl2 is your  /BIC/PMASTER second table.
It is selecting all contents from /BIC/ADSO00 table available and is selecting respective contents from /BIC/PMASTER second table using field 1 and field2 as key(unique in two tables) and moving into an internal table(structures used in program for holding values similar to DB and can hold values till program execution ends) and selection is valid only for entries in source_package another internal table.
Conditions for the selections are
tbl1~field3 = SOURCE_PACKAGE-field3
      AND tbl1~field4 BETWEEN lv_minper AND lv_maxper
      AND tbl1~field5 = SOURCE_PACKAGE-field5
      AND tbl1~field6 = '0100'
      AND tbl2~OBJVERS = 'A'.
Hope it will be helpful.
Regards,
Kannan