SQL dynamic query returning (problem with list of value)

Question

Hi, I'm having trouble with my query. I want to make where statement based on my selectlist, but the problem is that I couldnt write the correct string in my where condition.
:P61_STATUS has this following display, return value
Bewerber     Bewerber     
PRA_Kandidat     PRA_Kandidat          
abgelehnt     abgelehnt          
angenommen     angenommen          
Thema     Thema     
angemeldet     angemeldet          
abgegeben     abgegeben          
abgeschlossen     abgeschlossen          
bestätigt     bestätigt
DECLARE
  q varchar2(4000);
  list_betreuer htmldb_application_global.vc_arr2;
  list_semester htmldb_application_global.vc_arr2;
  list_status htmldb_application_global.vc_arr2;
BEGIN
-- variable to store the list
list_betreuer := HTMLDB_UTIL.STRING_TO_TABLE(:P61_BETREUER);
list_semester := HTMLDB_UTIL.STRING_TO_TABLE(:P61_SEMESTER);
list_status := HTMLDB_UTIL.STRING_TO_TABLE(:P61_STATUS);
-- Query begins
q:= 'select p1.name, p1.vorname , a1.tel, a2.tel, ';
q:= q||'ab.thema, ab.status, ab.typ, s.bezeichnung, p2.name ';
q:= q||'from person p1, person p2, adresse a1, adresse a2, ';
q:= q||'zuordnungp_a zpa1,zuordnungp_a zpa2, ';
q:= q||'abschlussarbeit ab, semester s ';
q:= q||'WHERE ab.SEMESTER = s.OBJECTID (+) ';
q:= q||'AND ab.STUDENT = p1.OBJECTID (+) ';
q:= q||'AND ab.BETREUER = p2.OBJECTID (+) ';
q:= q||'and p1.objectid = zpa1.person (+) ';
q:= q||'and zpa1.adresse  = a1.objectid (+) ';
q:= q||'and zpa1.art (+)= ''Privat'' ';
q:= q||'and p1.objectid = zpa2.person (+) ';
q:= q||'and zpa2.adresse  = a2.objectid (+) ';
q:= q||'and zpa2.art (+)= ''Geschäft'' ';
-- Loop for betreuer list
FOR i in 1..list_betreuer.count
LOOP
    IF i = 1 THEN
    q:= q||'AND (ab.betreuer = '||list_betreuer(i);
    ELSE
    q:= q||' OR ab.betreuer  = '||list_betreuer(i);
    END IF;
END LOOP; if (list_betreuer.count>0)THEN q:= q||')'; END IF;
  -- Loop for semester list
FOR i in 1..list_semester.count
LOOP
    IF i = 1 THEN
    q:= q||'AND (ab.semester = '||list_semester(i);
    ELSE
    q:= q||'OR ab.semester = '||list_semester(i);
    END IF;
END LOOP; if (list_semester.count>0)THEN q:= q||')'; END IF;
-- Loop for status list
FOR i in 1..list_status.count
LOOP
    IF i = 1 THEN
    q:= q||'AND (ab.status = '||list_status(i)||'';
    ELSE
    q:= q||'OR ab.status = '||list_status(i)||'';
    END IF;
END LOOP; if (list_status.count>0)THEN q:= q||')'; END IF;
  htp.p(q);
return q;
END;result
select p1.name, p1.vorname , a1.tel, a2.tel, ab.thema, ab.status, ab.typ, s.bezeichnung, p2.name from person p1, person p2, adresse a1, adresse a2, zuordnungp_a zpa1,zuordnungp_a zpa2, abschlussarbeit ab, semester s WHERE ab.SEMESTER = s.OBJECTID (+) AND ab.STUDENT = p1.OBJECTID (+) AND ab.BETREUER = p2.OBJECTID (+) and p1.objectid = zpa1.person (+) and zpa1.adresse = a1.objectid (+) and zpa1.art (+)= 'Privat' and p1.objectid = zpa2.person (+) and zpa2.adresse = a2.objectid (+) and zpa2.art (+)= 'Geschäft' AND (ab.status = abgegeben) the problem is in this statement
q:= q||'AND (ab.status = '||list_status(i)||'';that statement produce this following statement
ab.status = abgegebenbut what I need is this statement
ab.status = 'abgegeben';how can I achieve this statement?
thank you very much

Answer 1

raitodn wrote:
ah ok , I was confused with this q:= q||'AND (ab.status = '''||list_status(i)||'''';I think I get it now
basically stop the string and write double quotes before the variable
'AND (ab.status = ' + ''||list_status(i)||'' + ''No, more like "wherever I want a single quote within a string, I put two single quotes instead and that tells oracle it's a quote and not the end of the string".
q:= q||'AND (ab.status = '''||list_status(i)||'''';
       ^                 ^^^                  ^^^^
       |                 |/|                  ||/|
       |                 | |                  || \-- single quote indicates end of string
       |                 | |                  ||
       |                 | |                  |\-- two quotes indicate a single quote required
       |                 | |                  |
       |                 | |                  \-- single quote to open a new string
       |                 | |
       |                 | \-- single quote indicates end of string
       |                 |
       |                 \-- two quotes indicate single quote required
       \-- Open String