How can i dynamically select columns based on the input parameter?

I have an input parameter which takes single numeric value.
Based on this value i have to dynamically select table-columns .
For eg: if i have following fields in my table :
SEM_1
SEM_2
SEM_3 and SEM_4.
And if i give numeric input as 2 , then i have to select "SEM_2" column only.
if the input is 3 then i have to select "SEM_3" only and leave the rest of the columns.
how do i achieve this dynamic feature in the "Select ..... From...... table...." statement in the ABAP??

Hi,
you should try something like this.
TYPES: cond(72) TYPE c.
data: condtab TYPE TABLE OF cond,
condw type cond.
data: lv_field(30) type c value 'SEM_'.
write p_num to lv_field+4(1).
condw = lv_field.
append condw to condtab.
SELECT (CONDTAB) FROM table INTO.....
Kostas
Message was edited by:
Kostas Tsioubris

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How can i dynamically select columns based on the input parameter?

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