Dynamic select sql statement

Question

Hi currently i have a problem with the sql statement.
The field name and the table name of the sql statement will depend on what the user input. We need to find out what records is in tableA columnA and not in tableB columnB.
Below is my sql statement:
SELECT * FROM (TABLEA) INTO TABLE ITABA
WHERE (COLUMNA)
NOT IN ( SELECT (COLUMNB) FROM (TABLEB) ).
=============================================
ColumnA = "the user input the field name"
TableA = " the user input the table name"
TableB = " the user input the table name"
The problem lies at the WHERE clause. The system generate a sql error which says "unable to find the field name".

Answer 1

Hi,
Check the following code:
For dynamic table name....
REPORT demo_select_dynamic_database .
DATA wa TYPE scarr.
DATA name(10) TYPE c VALUE 'SCARR'.
SELECT *
INTO wa
FROM (name) CLIENT SPECIFIED
WHERE mandt = '000'.
WRITE: / wa-carrid, wa-carrname.
ENDSELECT.
For dynamic field list
REPORT demo_select_dynamic_columns .
DATA: itab TYPE STANDARD TABLE OF spfli,
            wa LIKE LINE OF itab.
DATA: line(72) TYPE c,
list LIKE TABLE OF line(72).
line = ' CITYFROM CITYTO '.
APPEND line TO list.
SELECT DISTINCT (list)
INTO CORRESPONDING FIELDS OF TABLE itab
FROM spfli.
IF sy-subrc EQ 0.
LOOP AT itab INTO wa.
WRITE: / wa-cityfrom, wa-cityto.
ENDLOOP.
ENDIF.
Regards,
Bhaskar