Is it possible to pass a variable in FROM clause in SQL?

Question

Hi Experts,
<i><b>loop at it_db_table.
select field1 from it_db_table-table_name into my_it.
endloop.</b></i>
I mean, Is it pass a variable value to FROM clause in SQL?
I got the info from SAP as,
<i><b>Works like variants 1-3, provided the source_text varialb contains the table name or a join expression as ABAP source text.
Examples
Output of a list of all customers:
DATA  tabname(10).
DATA: BEGIN OF wa,
        id   TYPE scustom-id,
        name TYPE scustom-name,
      END OF wa.
tabname = 'SCUSTOM'.
SELECT id name INTO CORRESPONDING FIELDS OF wa FROM (tabname).
  WRITE: / wa-id, wa-name.
ENDSELECT.</b></i>
thanq.

Answer 1

Here is a short sample of a dynamic select statement.
Enter your table name in the parameter on selection screen. Enter you where clause in the select-option on selection screen.
I used.....
MARA
MTART = 'HALB'
report zrich_0004 .
data: xwhere(30) type c.
data: iwhere(30) type c occurs 0.
data:itab(1000) type c occurs 0 with header line.
parameters: p_table(30) type c.
select-options: s_where for xwhere.
loop at s_where.
  clear iwhere.
  xwhere = s_where-low.
  append xwhere to iwhere.
endloop.
select * up to 100 rows into table itab
          from (p_table)
                where (iwhere).
loop at itab.
  write:/ itab.
endloop.
Regards
vasu